CVE-2023-53240 (GCVE-0-2023-53240)

Vulnerability from cvelistv5 – Published: 2025-09-15 14:22 – Updated: 2026-05-23 15:28
VLAI
Title
xsk: check IFF_UP earlier in Tx path
Summary
In the Linux kernel, the following vulnerability has been resolved: xsk: check IFF_UP earlier in Tx path Xsk Tx can be triggered via either sendmsg() or poll() syscalls. These two paths share a call to common function xsk_xmit() which has two sanity checks within. A pseudo code example to show the two paths: __xsk_sendmsg() : xsk_poll(): if (unlikely(!xsk_is_bound(xs))) if (unlikely(!xsk_is_bound(xs))) return -ENXIO; return mask; if (unlikely(need_wait)) (...) return -EOPNOTSUPP; xsk_xmit() mark napi id (...) xsk_xmit() xsk_xmit(): if (unlikely(!(xs->dev->flags & IFF_UP))) return -ENETDOWN; if (unlikely(!xs->tx)) return -ENOBUFS; As it can be observed above, in sendmsg() napi id can be marked on interface that was not brought up and this causes a NULL ptr dereference: [31757.505631] BUG: kernel NULL pointer dereference, address: 0000000000000018 [31757.512710] #PF: supervisor read access in kernel mode [31757.517936] #PF: error_code(0x0000) - not-present page [31757.523149] PGD 0 P4D 0 [31757.525726] Oops: 0000 [#1] PREEMPT SMP NOPTI [31757.530154] CPU: 26 PID: 95641 Comm: xdpsock Not tainted 6.2.0-rc5+ #40 [31757.536871] Hardware name: Intel Corporation S2600WFT/S2600WFT, BIOS SE5C620.86B.02.01.0008.031920191559 03/19/2019 [31757.547457] RIP: 0010:xsk_sendmsg+0xde/0x180 [31757.551799] Code: 00 75 a2 48 8b 00 a8 04 75 9b 84 d2 74 69 8b 85 14 01 00 00 85 c0 75 1b 48 8b 85 28 03 00 00 48 8b 80 98 00 00 00 48 8b 40 20 <8b> 40 18 89 85 14 01 00 00 8b bd 14 01 00 00 81 ff 00 01 00 00 0f [31757.570840] RSP: 0018:ffffc90034f27dc0 EFLAGS: 00010246 [31757.576143] RAX: 0000000000000000 RBX: ffffc90034f27e18 RCX: 0000000000000000 [31757.583389] RDX: 0000000000000001 RSI: ffffc90034f27e18 RDI: ffff88984cf3c100 [31757.590631] RBP: ffff88984714a800 R08: ffff88984714a800 R09: 0000000000000000 [31757.597877] R10: 0000000000000001 R11: 0000000000000000 R12: 00000000fffffffa [31757.605123] R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000000 [31757.612364] FS: 00007fb4c5931180(0000) GS:ffff88afdfa00000(0000) knlGS:0000000000000000 [31757.620571] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [31757.626406] CR2: 0000000000000018 CR3: 000000184b41c003 CR4: 00000000007706e0 [31757.633648] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [31757.640894] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [31757.648139] PKRU: 55555554 [31757.650894] Call Trace: [31757.653385] <TASK> [31757.655524] sock_sendmsg+0x8f/0xa0 [31757.659077] ? sockfd_lookup_light+0x12/0x70 [31757.663416] __sys_sendto+0xfc/0x170 [31757.667051] ? do_sched_setscheduler+0xdb/0x1b0 [31757.671658] __x64_sys_sendto+0x20/0x30 [31757.675557] do_syscall_64+0x38/0x90 [31757.679197] entry_SYSCALL_64_after_hwframe+0x72/0xdc [31757.687969] Code: 8e f6 ff 44 8b 4c 24 2c 4c 8b 44 24 20 41 89 c4 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 <48> 3d 00 f0 ff ff 77 3a 44 89 e7 48 89 44 24 08 e8 b5 8e f6 ff 48 [31757.707007] RSP: 002b:00007ffd49c73c70 EFLAGS: 00000293 ORIG_RAX: 000000000000002c [31757.714694] RAX: ffffffffffffffda RBX: 000055a996565380 RCX: 00007fb4c5727c16 [31757.721939] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003 [31757.729184] RBP: 0000000000000040 R08: 0000000000000000 R09: 0000000000000000 [31757.736429] R10: 0000000000000040 R11: 0000000000000293 R12: 0000000000000000 [31757.743673] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [31757.754940] </TASK> To fix this, let's make xsk_xmit a function that will be responsible for generic Tx, where RCU is handled accordingly and pull out sanity checks and xs->zc handling. Populate sanity checks to __xsk_sendmsg() and xsk_poll().
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-01-14 17:57 UTC
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 18b1ab7aa76bde181bdb1ab19a87fa9523c32f21 , < cecc68559cd57fffb2be50685f262b9af2318e16 (git)
Affected: 18b1ab7aa76bde181bdb1ab19a87fa9523c32f21 , < ffe19750e68d0bb21e8110b398346eef20b156a7 (git)
Affected: 18b1ab7aa76bde181bdb1ab19a87fa9523c32f21 , < 1596dae2f17ec5c6e8c8f0e3fec78c5ae55c1e0b (git)
Affected: ad7219cd8751bd258b9d1e69ae0654ec00f71875 (git)
Affected: d1579253ffce39986e7a6ab757ac93b2680a665f (git)
Affected: 8a2dea162b92c322f3e42eae0c4a74b8d20aa7a9 (git)
Affected: 5.15.33 , < 5.16 (semver)
Affected: 5.16.19 , < 5.17 (semver)
Affected: 5.17.2 , < 5.18 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (semver)
Unaffected: 6.1.16 , ≤ 6.1.* (semver)
Unaffected: 6.2.3 , ≤ 6.2.* (semver)
Unaffected: 6.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2023-53240",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-14T17:57:36.337425Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-476",
                "description": "CWE-476 NULL Pointer Dereference",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-01-14T18:02:50.570Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/xdp/xsk.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "cecc68559cd57fffb2be50685f262b9af2318e16",
              "status": "affected",
              "version": "18b1ab7aa76bde181bdb1ab19a87fa9523c32f21",
              "versionType": "git"
            },
            {
              "lessThan": "ffe19750e68d0bb21e8110b398346eef20b156a7",
              "status": "affected",
              "version": "18b1ab7aa76bde181bdb1ab19a87fa9523c32f21",
              "versionType": "git"
            },
            {
              "lessThan": "1596dae2f17ec5c6e8c8f0e3fec78c5ae55c1e0b",
              "status": "affected",
              "version": "18b1ab7aa76bde181bdb1ab19a87fa9523c32f21",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ad7219cd8751bd258b9d1e69ae0654ec00f71875",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "d1579253ffce39986e7a6ab757ac93b2680a665f",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "8a2dea162b92c322f3e42eae0c4a74b8d20aa7a9",
              "versionType": "git"
            },
            {
              "lessThan": "5.16",
              "status": "affected",
              "version": "5.15.33",
              "versionType": "semver"
            },
            {
              "lessThan": "5.17",
              "status": "affected",
              "version": "5.16.19",
              "versionType": "semver"
            },
            {
              "lessThan": "5.18",
              "status": "affected",
              "version": "5.17.2",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/xdp/xsk.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.18"
            },
            {
              "lessThan": "5.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.2.*",
              "status": "unaffected",
              "version": "6.2.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.16",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2.3",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.3",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.15.33",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.16.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.17.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: check IFF_UP earlier in Tx path\n\nXsk Tx can be triggered via either sendmsg() or poll() syscalls. These\ntwo paths share a call to common function xsk_xmit() which has two\nsanity checks within. A pseudo code example to show the two paths:\n\n__xsk_sendmsg() :                       xsk_poll():\nif (unlikely(!xsk_is_bound(xs)))        if (unlikely(!xsk_is_bound(xs)))\n    return -ENXIO;                          return mask;\nif (unlikely(need_wait))                (...)\n    return -EOPNOTSUPP;                 xsk_xmit()\nmark napi id\n(...)\nxsk_xmit()\n\nxsk_xmit():\nif (unlikely(!(xs-\u003edev-\u003eflags \u0026 IFF_UP)))\n\treturn -ENETDOWN;\nif (unlikely(!xs-\u003etx))\n\treturn -ENOBUFS;\n\nAs it can be observed above, in sendmsg() napi id can be marked on\ninterface that was not brought up and this causes a NULL ptr\ndereference:\n\n[31757.505631] BUG: kernel NULL pointer dereference, address: 0000000000000018\n[31757.512710] #PF: supervisor read access in kernel mode\n[31757.517936] #PF: error_code(0x0000) - not-present page\n[31757.523149] PGD 0 P4D 0\n[31757.525726] Oops: 0000 [#1] PREEMPT SMP NOPTI\n[31757.530154] CPU: 26 PID: 95641 Comm: xdpsock Not tainted 6.2.0-rc5+ #40\n[31757.536871] Hardware name: Intel Corporation S2600WFT/S2600WFT, BIOS SE5C620.86B.02.01.0008.031920191559 03/19/2019\n[31757.547457] RIP: 0010:xsk_sendmsg+0xde/0x180\n[31757.551799] Code: 00 75 a2 48 8b 00 a8 04 75 9b 84 d2 74 69 8b 85 14 01 00 00 85 c0 75 1b 48 8b 85 28 03 00 00 48 8b 80 98 00 00 00 48 8b 40 20 \u003c8b\u003e 40 18 89 85 14 01 00 00 8b bd 14 01 00 00 81 ff 00 01 00 00 0f\n[31757.570840] RSP: 0018:ffffc90034f27dc0 EFLAGS: 00010246\n[31757.576143] RAX: 0000000000000000 RBX: ffffc90034f27e18 RCX: 0000000000000000\n[31757.583389] RDX: 0000000000000001 RSI: ffffc90034f27e18 RDI: ffff88984cf3c100\n[31757.590631] RBP: ffff88984714a800 R08: ffff88984714a800 R09: 0000000000000000\n[31757.597877] R10: 0000000000000001 R11: 0000000000000000 R12: 00000000fffffffa\n[31757.605123] R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000000\n[31757.612364] FS:  00007fb4c5931180(0000) GS:ffff88afdfa00000(0000) knlGS:0000000000000000\n[31757.620571] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[31757.626406] CR2: 0000000000000018 CR3: 000000184b41c003 CR4: 00000000007706e0\n[31757.633648] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[31757.640894] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[31757.648139] PKRU: 55555554\n[31757.650894] Call Trace:\n[31757.653385]  \u003cTASK\u003e\n[31757.655524]  sock_sendmsg+0x8f/0xa0\n[31757.659077]  ? sockfd_lookup_light+0x12/0x70\n[31757.663416]  __sys_sendto+0xfc/0x170\n[31757.667051]  ? do_sched_setscheduler+0xdb/0x1b0\n[31757.671658]  __x64_sys_sendto+0x20/0x30\n[31757.675557]  do_syscall_64+0x38/0x90\n[31757.679197]  entry_SYSCALL_64_after_hwframe+0x72/0xdc\n[31757.687969] Code: 8e f6 ff 44 8b 4c 24 2c 4c 8b 44 24 20 41 89 c4 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 3a 44 89 e7 48 89 44 24 08 e8 b5 8e f6 ff 48\n[31757.707007] RSP: 002b:00007ffd49c73c70 EFLAGS: 00000293 ORIG_RAX: 000000000000002c\n[31757.714694] RAX: ffffffffffffffda RBX: 000055a996565380 RCX: 00007fb4c5727c16\n[31757.721939] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003\n[31757.729184] RBP: 0000000000000040 R08: 0000000000000000 R09: 0000000000000000\n[31757.736429] R10: 0000000000000040 R11: 0000000000000293 R12: 0000000000000000\n[31757.743673] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\n[31757.754940]  \u003c/TASK\u003e\n\nTo fix this, let\u0027s make xsk_xmit a function that will be responsible for\ngeneric Tx, where RCU is handled accordingly and pull out sanity checks\nand xs-\u003ezc handling. Populate sanity checks to __xsk_sendmsg() and\nxsk_poll()."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-23T15:28:23.218Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/cecc68559cd57fffb2be50685f262b9af2318e16"
        },
        {
          "url": "https://git.kernel.org/stable/c/ffe19750e68d0bb21e8110b398346eef20b156a7"
        },
        {
          "url": "https://git.kernel.org/stable/c/1596dae2f17ec5c6e8c8f0e3fec78c5ae55c1e0b"
        }
      ],
      "title": "xsk: check IFF_UP earlier in Tx path",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53240",
    "datePublished": "2025-09-15T14:22:14.241Z",
    "dateReserved": "2025-09-15T14:19:21.848Z",
    "dateUpdated": "2026-05-23T15:28:23.218Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2023-53240",
      "date": "2026-10-30",
      "epss": "0.00157",
      "percentile": "0.04858"
    },
    "microsoft_vex": {
      "current_release_date": "2026-03-31T15:10:35.000Z",
      "cve": "CVE-2023-53240",
      "id": "msrc_CVE-2023-53240",
      "initial_release_date": "2025-09-02T00:00:00.000Z",
      "product_status:known_affected": "3",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "xsk: check IFF_UP earlier in Tx path",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2023-53240.json",
      "version": "3"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "net/xdp/xsk.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "cecc68559cd57fffb2be50685f262b9af2318e16",
                    "status": "affected",
                    "version": "18b1ab7aa76bde181bdb1ab19a87fa9523c32f21",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "ffe19750e68d0bb21e8110b398346eef20b156a7",
                    "status": "affected",
                    "version": "18b1ab7aa76bde181bdb1ab19a87fa9523c32f21",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "1596dae2f17ec5c6e8c8f0e3fec78c5ae55c1e0b",
                    "status": "affected",
                    "version": "18b1ab7aa76bde181bdb1ab19a87fa9523c32f21",
                    "versionType": "git"
                  },
                  {
                    "status": "affected",
                    "version": "ad7219cd8751bd258b9d1e69ae0654ec00f71875",
                    "versionType": "git"
                  },
                  {
                    "status": "affected",
                    "version": "d1579253ffce39986e7a6ab757ac93b2680a665f",
                    "versionType": "git"
                  },
                  {
                    "status": "affected",
                    "version": "8a2dea162b92c322f3e42eae0c4a74b8d20aa7a9",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "5.16",
                    "status": "affected",
                    "version": "5.15.33",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "5.17",
                    "status": "affected",
                    "version": "5.16.19",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "5.18",
                    "status": "affected",
                    "version": "5.17.2",
                    "versionType": "semver"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "net/xdp/xsk.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "5.18"
                  },
                  {
                    "lessThan": "5.18",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.16",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.2.*",
                    "status": "unaffected",
                    "version": "6.2.3",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "6.3",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "38E7A7B3-C56B-4D09-A3BC-1A47B10759B8",
                    "versionEndExcluding": "5.16",
                    "versionStartIncluding": "5.15.33",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "D4ED89FC-18EE-445F-8FE2-A2B6A5F9BB13",
                    "versionEndExcluding": "5.17",
                    "versionStartIncluding": "5.16.19",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "AD68A6E9-F664-4594-B8A0-ED32253D6067",
                    "versionEndExcluding": "6.1.16",
                    "versionStartIncluding": "5.17.2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "88C67289-22AD-4CA9-B202-5F5A80E5BA4B",
                    "versionEndExcluding": "6.2.3",
                    "versionStartIncluding": "6.2",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: check IFF_UP earlier in Tx path\n\nXsk Tx can be triggered via either sendmsg() or poll() syscalls. These\ntwo paths share a call to common function xsk_xmit() which has two\nsanity checks within. A pseudo code example to show the two paths:\n\n__xsk_sendmsg() :                       xsk_poll():\nif (unlikely(!xsk_is_bound(xs)))        if (unlikely(!xsk_is_bound(xs)))\n    return -ENXIO;                          return mask;\nif (unlikely(need_wait))                (...)\n    return -EOPNOTSUPP;                 xsk_xmit()\nmark napi id\n(...)\nxsk_xmit()\n\nxsk_xmit():\nif (unlikely(!(xs-\u003edev-\u003eflags \u0026 IFF_UP)))\n\treturn -ENETDOWN;\nif (unlikely(!xs-\u003etx))\n\treturn -ENOBUFS;\n\nAs it can be observed above, in sendmsg() napi id can be marked on\ninterface that was not brought up and this causes a NULL ptr\ndereference:\n\n[31757.505631] BUG: kernel NULL pointer dereference, address: 0000000000000018\n[31757.512710] #PF: supervisor read access in kernel mode\n[31757.517936] #PF: error_code(0x0000) - not-present page\n[31757.523149] PGD 0 P4D 0\n[31757.525726] Oops: 0000 [#1] PREEMPT SMP NOPTI\n[31757.530154] CPU: 26 PID: 95641 Comm: xdpsock Not tainted 6.2.0-rc5+ #40\n[31757.536871] Hardware name: Intel Corporation S2600WFT/S2600WFT, BIOS SE5C620.86B.02.01.0008.031920191559 03/19/2019\n[31757.547457] RIP: 0010:xsk_sendmsg+0xde/0x180\n[31757.551799] Code: 00 75 a2 48 8b 00 a8 04 75 9b 84 d2 74 69 8b 85 14 01 00 00 85 c0 75 1b 48 8b 85 28 03 00 00 48 8b 80 98 00 00 00 48 8b 40 20 \u003c8b\u003e 40 18 89 85 14 01 00 00 8b bd 14 01 00 00 81 ff 00 01 00 00 0f\n[31757.570840] RSP: 0018:ffffc90034f27dc0 EFLAGS: 00010246\n[31757.576143] RAX: 0000000000000000 RBX: ffffc90034f27e18 RCX: 0000000000000000\n[31757.583389] RDX: 0000000000000001 RSI: ffffc90034f27e18 RDI: ffff88984cf3c100\n[31757.590631] RBP: ffff88984714a800 R08: ffff88984714a800 R09: 0000000000000000\n[31757.597877] R10: 0000000000000001 R11: 0000000000000000 R12: 00000000fffffffa\n[31757.605123] R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000000\n[31757.612364] FS:  00007fb4c5931180(0000) GS:ffff88afdfa00000(0000) knlGS:0000000000000000\n[31757.620571] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[31757.626406] CR2: 0000000000000018 CR3: 000000184b41c003 CR4: 00000000007706e0\n[31757.633648] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[31757.640894] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[31757.648139] PKRU: 55555554\n[31757.650894] Call Trace:\n[31757.653385]  \u003cTASK\u003e\n[31757.655524]  sock_sendmsg+0x8f/0xa0\n[31757.659077]  ? sockfd_lookup_light+0x12/0x70\n[31757.663416]  __sys_sendto+0xfc/0x170\n[31757.667051]  ? do_sched_setscheduler+0xdb/0x1b0\n[31757.671658]  __x64_sys_sendto+0x20/0x30\n[31757.675557]  do_syscall_64+0x38/0x90\n[31757.679197]  entry_SYSCALL_64_after_hwframe+0x72/0xdc\n[31757.687969] Code: 8e f6 ff 44 8b 4c 24 2c 4c 8b 44 24 20 41 89 c4 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 3a 44 89 e7 48 89 44 24 08 e8 b5 8e f6 ff 48\n[31757.707007] RSP: 002b:00007ffd49c73c70 EFLAGS: 00000293 ORIG_RAX: 000000000000002c\n[31757.714694] RAX: ffffffffffffffda RBX: 000055a996565380 RCX: 00007fb4c5727c16\n[31757.721939] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003\n[31757.729184] RBP: 0000000000000040 R08: 0000000000000000 R09: 0000000000000000\n[31757.736429] R10: 0000000000000040 R11: 0000000000000293 R12: 0000000000000000\n[31757.743673] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\n[31757.754940]  \u003c/TASK\u003e\n\nTo fix this, let\u0027s make xsk_xmit a function that will be responsible for\ngeneric Tx, where RCU is handled accordingly and pull out sanity checks\nand xs-\u003ezc handling. Populate sanity checks to __xsk_sendmsg() and\nxsk_poll()."
          }
        ],
        "id": "CVE-2023-53240",
        "lastModified": "2026-06-17T06:44:36.210",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            },
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2023-53240",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-14T17:57:36.337425Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2025-09-15T15:15:51.120",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/1596dae2f17ec5c6e8c8f0e3fec78c5ae55c1e0b"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/cecc68559cd57fffb2be50685f262b9af2318e16"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/ffe19750e68d0bb21e8110b398346eef20b156a7"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-476"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          },
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-476"
              }
            ],
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "type": "Secondary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-30T02:49:14+00:00",
      "cve": "CVE-2023-53240",
      "id": "CVE-2023-53240",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:fixed": "201",
      "product_status:known_affected": "109",
      "product_status:known_not_affected": "167",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: xsk: check IFF_UP earlier in Tx path",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53240.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T13:59:37Z",
      "cve": "CVE-2023-53240",
      "id": "CVE-2023-53240",
      "initial_release_date": "2025-09-17T23:29:16Z",
      "product_status:known_not_affected": "523",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-53240",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-53240.json",
      "version": "8"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "cvssV3_1": {
                  "attackComplexity": "LOW",
                  "attackVector": "LOCAL",
                  "availabilityImpact": "HIGH",
                  "baseScore": 5.5,
                  "baseSeverity": "MEDIUM",
                  "confidentialityImpact": "NONE",
                  "integrityImpact": "NONE",
                  "privilegesRequired": "LOW",
                  "scope": "UNCHANGED",
                  "userInteraction": "NONE",
                  "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "version": "3.1"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2023-53240",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-01-14T17:57:36.337425Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-476",
                    "description": "CWE-476 NULL Pointer Dereference",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-01-14T17:57:32.342Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "net/xdp/xsk.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "cecc68559cd57fffb2be50685f262b9af2318e16",
                  "status": "affected",
                  "version": "18b1ab7aa76bde181bdb1ab19a87fa9523c32f21",
                  "versionType": "git"
                },
                {
                  "lessThan": "ffe19750e68d0bb21e8110b398346eef20b156a7",
                  "status": "affected",
                  "version": "18b1ab7aa76bde181bdb1ab19a87fa9523c32f21",
                  "versionType": "git"
                },
                {
                  "lessThan": "1596dae2f17ec5c6e8c8f0e3fec78c5ae55c1e0b",
                  "status": "affected",
                  "version": "18b1ab7aa76bde181bdb1ab19a87fa9523c32f21",
                  "versionType": "git"
                },
                {
                  "status": "affected",
                  "version": "ad7219cd8751bd258b9d1e69ae0654ec00f71875",
                  "versionType": "git"
                },
                {
                  "status": "affected",
                  "version": "d1579253ffce39986e7a6ab757ac93b2680a665f",
                  "versionType": "git"
                },
                {
                  "status": "affected",
                  "version": "8a2dea162b92c322f3e42eae0c4a74b8d20aa7a9",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "net/xdp/xsk.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "5.18"
                },
                {
                  "lessThan": "5.18",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.16",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.2.*",
                  "status": "unaffected",
                  "version": "6.2.3",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.3",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.16",
                      "versionStartIncluding": "5.18",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.2.3",
                      "versionStartIncluding": "5.18",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.3",
                      "versionStartIncluding": "5.18",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionStartIncluding": "5.15.33",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionStartIncluding": "5.16.19",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionStartIncluding": "5.17.2",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: check IFF_UP earlier in Tx path\n\nXsk Tx can be triggered via either sendmsg() or poll() syscalls. These\ntwo paths share a call to common function xsk_xmit() which has two\nsanity checks within. A pseudo code example to show the two paths:\n\n__xsk_sendmsg() :                       xsk_poll():\nif (unlikely(!xsk_is_bound(xs)))        if (unlikely(!xsk_is_bound(xs)))\n    return -ENXIO;                          return mask;\nif (unlikely(need_wait))                (...)\n    return -EOPNOTSUPP;                 xsk_xmit()\nmark napi id\n(...)\nxsk_xmit()\n\nxsk_xmit():\nif (unlikely(!(xs-\u003edev-\u003eflags \u0026 IFF_UP)))\n\treturn -ENETDOWN;\nif (unlikely(!xs-\u003etx))\n\treturn -ENOBUFS;\n\nAs it can be observed above, in sendmsg() napi id can be marked on\ninterface that was not brought up and this causes a NULL ptr\ndereference:\n\n[31757.505631] BUG: kernel NULL pointer dereference, address: 0000000000000018\n[31757.512710] #PF: supervisor read access in kernel mode\n[31757.517936] #PF: error_code(0x0000) - not-present page\n[31757.523149] PGD 0 P4D 0\n[31757.525726] Oops: 0000 [#1] PREEMPT SMP NOPTI\n[31757.530154] CPU: 26 PID: 95641 Comm: xdpsock Not tainted 6.2.0-rc5+ #40\n[31757.536871] Hardware name: Intel Corporation S2600WFT/S2600WFT, BIOS SE5C620.86B.02.01.0008.031920191559 03/19/2019\n[31757.547457] RIP: 0010:xsk_sendmsg+0xde/0x180\n[31757.551799] Code: 00 75 a2 48 8b 00 a8 04 75 9b 84 d2 74 69 8b 85 14 01 00 00 85 c0 75 1b 48 8b 85 28 03 00 00 48 8b 80 98 00 00 00 48 8b 40 20 \u003c8b\u003e 40 18 89 85 14 01 00 00 8b bd 14 01 00 00 81 ff 00 01 00 00 0f\n[31757.570840] RSP: 0018:ffffc90034f27dc0 EFLAGS: 00010246\n[31757.576143] RAX: 0000000000000000 RBX: ffffc90034f27e18 RCX: 0000000000000000\n[31757.583389] RDX: 0000000000000001 RSI: ffffc90034f27e18 RDI: ffff88984cf3c100\n[31757.590631] RBP: ffff88984714a800 R08: ffff88984714a800 R09: 0000000000000000\n[31757.597877] R10: 0000000000000001 R11: 0000000000000000 R12: 00000000fffffffa\n[31757.605123] R13: 0000000000000000 R14: 0000000000000003 R15: 0000000000000000\n[31757.612364] FS:  00007fb4c5931180(0000) GS:ffff88afdfa00000(0000) knlGS:0000000000000000\n[31757.620571] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[31757.626406] CR2: 0000000000000018 CR3: 000000184b41c003 CR4: 00000000007706e0\n[31757.633648] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[31757.640894] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[31757.648139] PKRU: 55555554\n[31757.650894] Call Trace:\n[31757.653385]  \u003cTASK\u003e\n[31757.655524]  sock_sendmsg+0x8f/0xa0\n[31757.659077]  ? sockfd_lookup_light+0x12/0x70\n[31757.663416]  __sys_sendto+0xfc/0x170\n[31757.667051]  ? do_sched_setscheduler+0xdb/0x1b0\n[31757.671658]  __x64_sys_sendto+0x20/0x30\n[31757.675557]  do_syscall_64+0x38/0x90\n[31757.679197]  entry_SYSCALL_64_after_hwframe+0x72/0xdc\n[31757.687969] Code: 8e f6 ff 44 8b 4c 24 2c 4c 8b 44 24 20 41 89 c4 44 8b 54 24 28 48 8b 54 24 18 b8 2c 00 00 00 48 8b 74 24 10 8b 7c 24 08 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 3a 44 89 e7 48 89 44 24 08 e8 b5 8e f6 ff 48\n[31757.707007] RSP: 002b:00007ffd49c73c70 EFLAGS: 00000293 ORIG_RAX: 000000000000002c\n[31757.714694] RAX: ffffffffffffffda RBX: 000055a996565380 RCX: 00007fb4c5727c16\n[31757.721939] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003\n[31757.729184] RBP: 0000000000000040 R08: 0000000000000000 R09: 0000000000000000\n[31757.736429] R10: 0000000000000040 R11: 0000000000000293 R12: 0000000000000000\n[31757.743673] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\n[31757.754940]  \u003c/TASK\u003e\n\nTo fix this, let\u0027s make xsk_xmit a function that will be responsible for\ngeneric Tx, where RCU is handled accordingly and pull out sanity checks\nand xs-\u003ezc handling. Populate sanity checks to __xsk_sendmsg() and\nxsk_poll()."
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2025-09-15T14:22:14.241Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/cecc68559cd57fffb2be50685f262b9af2318e16"
            },
            {
              "url": "https://git.kernel.org/stable/c/ffe19750e68d0bb21e8110b398346eef20b156a7"
            },
            {
              "url": "https://git.kernel.org/stable/c/1596dae2f17ec5c6e8c8f0e3fec78c5ae55c1e0b"
            }
          ],
          "title": "xsk: check IFF_UP earlier in Tx path",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2023-53240",
        "datePublished": "2025-09-15T14:22:14.241Z",
        "dateReserved": "2025-09-15T14:19:21.848Z",
        "dateUpdated": "2026-01-14T18:02:50.570Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.