CVE-2023-53671 (GCVE-0-2023-53671)

Vulnerability from cvelistv5 – Published: 2025-10-07 15:21 – Updated: 2026-05-11 19:49
VLAI
Title
srcu: Delegate work to the boot cpu if using SRCU_SIZE_SMALL
Summary
In the Linux kernel, the following vulnerability has been resolved: srcu: Delegate work to the boot cpu if using SRCU_SIZE_SMALL Commit 994f706872e6 ("srcu: Make Tree SRCU able to operate without snp_node array") assumes that cpu 0 is always online. However, there really are situations when some other CPU is the boot CPU, for example, when booting a kdump kernel with the maxcpus=1 boot parameter. On PowerPC, the kdump kernel can hang as follows: ... [ 1.740036] systemd[1]: Hostname set to <xyz.com> [ 243.686240] INFO: task systemd:1 blocked for more than 122 seconds. [ 243.686264] Not tainted 6.1.0-rc1 #1 [ 243.686272] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 243.686281] task:systemd state:D stack:0 pid:1 ppid:0 flags:0x00042000 [ 243.686296] Call Trace: [ 243.686301] [c000000016657640] [c000000016657670] 0xc000000016657670 (unreliable) [ 243.686317] [c000000016657830] [c00000001001dec0] __switch_to+0x130/0x220 [ 243.686333] [c000000016657890] [c000000010f607b8] __schedule+0x1f8/0x580 [ 243.686347] [c000000016657940] [c000000010f60bb4] schedule+0x74/0x140 [ 243.686361] [c0000000166579b0] [c000000010f699b8] schedule_timeout+0x168/0x1c0 [ 243.686374] [c000000016657a80] [c000000010f61de8] __wait_for_common+0x148/0x360 [ 243.686387] [c000000016657b20] [c000000010176bb0] __flush_work.isra.0+0x1c0/0x3d0 [ 243.686401] [c000000016657bb0] [c0000000105f2768] fsnotify_wait_marks_destroyed+0x28/0x40 [ 243.686415] [c000000016657bd0] [c0000000105f21b8] fsnotify_destroy_group+0x68/0x160 [ 243.686428] [c000000016657c40] [c0000000105f6500] inotify_release+0x30/0xa0 [ 243.686440] [c000000016657cb0] [c0000000105751a8] __fput+0xc8/0x350 [ 243.686452] [c000000016657d00] [c00000001017d524] task_work_run+0xe4/0x170 [ 243.686464] [c000000016657d50] [c000000010020e94] do_notify_resume+0x134/0x140 [ 243.686478] [c000000016657d80] [c00000001002eb18] interrupt_exit_user_prepare_main+0x198/0x270 [ 243.686493] [c000000016657de0] [c00000001002ec60] syscall_exit_prepare+0x70/0x180 [ 243.686505] [c000000016657e10] [c00000001000bf7c] system_call_vectored_common+0xfc/0x280 [ 243.686520] --- interrupt: 3000 at 0x7fffa47d5ba4 [ 243.686528] NIP: 00007fffa47d5ba4 LR: 0000000000000000 CTR: 0000000000000000 [ 243.686538] REGS: c000000016657e80 TRAP: 3000 Not tainted (6.1.0-rc1) [ 243.686548] MSR: 800000000000d033 <SF,EE,PR,ME,IR,DR,RI,LE> CR: 42044440 XER: 00000000 [ 243.686572] IRQMASK: 0 [ 243.686572] GPR00: 0000000000000006 00007ffffa606710 00007fffa48e7200 0000000000000000 [ 243.686572] GPR04: 0000000000000002 000000000000000a 0000000000000000 0000000000000001 [ 243.686572] GPR08: 000001000c172dd0 0000000000000000 0000000000000000 0000000000000000 [ 243.686572] GPR12: 0000000000000000 00007fffa4ff4bc0 0000000000000000 0000000000000000 [ 243.686572] GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000 [ 243.686572] GPR20: 0000000132dfdc50 000000000000000e 0000000000189375 0000000000000000 [ 243.686572] GPR24: 00007ffffa606ae0 0000000000000005 000001000c185490 000001000c172570 [ 243.686572] GPR28: 000001000c172990 000001000c184850 000001000c172e00 00007fffa4fedd98 [ 243.686683] NIP [00007fffa47d5ba4] 0x7fffa47d5ba4 [ 243.686691] LR [0000000000000000] 0x0 [ 243.686698] --- interrupt: 3000 [ 243.686708] INFO: task kworker/u16:1:24 blocked for more than 122 seconds. [ 243.686717] Not tainted 6.1.0-rc1 #1 [ 243.686724] "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. [ 243.686733] task:kworker/u16:1 state:D stack:0 pid:24 ppid:2 flags:0x00000800 [ 243.686747] Workqueue: events_unbound fsnotify_mark_destroy_workfn [ 243.686758] Call Trace: [ 243.686762] [c0000000166736e0] [c00000004fd91000] 0xc00000004fd91000 (unreliable) [ 243.686775] [c0000000166738d0] [c00000001001dec0] __switch_to+0x130/0x220 [ 243.686788] [c000000016673930] [c000000010f607b8] __schedule+0x1f8/0x ---truncated---
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
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: 994f706872e6ce080506bd795ecf783d5b617de6 , < 2c4d26dad76eadaa45a24543e311e9ce5d09f04e (git)
Affected: 994f706872e6ce080506bd795ecf783d5b617de6 , < c7c0bc03fa44942fe0fdc5ac52cda6e11529c0ea (git)
Affected: 994f706872e6ce080506bd795ecf783d5b617de6 , < 7f24626d6dd844bfc6d1f492d214d29c86d02550 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.19
Unaffected: 0 , < 5.19 (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.
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/rcu/srcutree.c"
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "versionType": "git"
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              "status": "affected",
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              "versionType": "git"
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          "programFiles": [
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          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.19"
            },
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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            {
              "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"
            }
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        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2.3",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.3",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsrcu: Delegate work to the boot cpu if using SRCU_SIZE_SMALL\n\nCommit 994f706872e6 (\"srcu: Make Tree SRCU able to operate without\nsnp_node array\") assumes that cpu 0 is always online.  However, there\nreally are situations when some other CPU is the boot CPU, for example,\nwhen booting a kdump kernel with the maxcpus=1 boot parameter.\n\nOn PowerPC, the kdump kernel can hang as follows:\n...\n[    1.740036] systemd[1]: Hostname set to \u003cxyz.com\u003e\n[  243.686240] INFO: task systemd:1 blocked for more than 122 seconds.\n[  243.686264]       Not tainted 6.1.0-rc1 #1\n[  243.686272] \"echo 0 \u003e /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\n[  243.686281] task:systemd         state:D stack:0     pid:1     ppid:0      flags:0x00042000\n[  243.686296] Call Trace:\n[  243.686301] [c000000016657640] [c000000016657670] 0xc000000016657670 (unreliable)\n[  243.686317] [c000000016657830] [c00000001001dec0] __switch_to+0x130/0x220\n[  243.686333] [c000000016657890] [c000000010f607b8] __schedule+0x1f8/0x580\n[  243.686347] [c000000016657940] [c000000010f60bb4] schedule+0x74/0x140\n[  243.686361] [c0000000166579b0] [c000000010f699b8] schedule_timeout+0x168/0x1c0\n[  243.686374] [c000000016657a80] [c000000010f61de8] __wait_for_common+0x148/0x360\n[  243.686387] [c000000016657b20] [c000000010176bb0] __flush_work.isra.0+0x1c0/0x3d0\n[  243.686401] [c000000016657bb0] [c0000000105f2768] fsnotify_wait_marks_destroyed+0x28/0x40\n[  243.686415] [c000000016657bd0] [c0000000105f21b8] fsnotify_destroy_group+0x68/0x160\n[  243.686428] [c000000016657c40] [c0000000105f6500] inotify_release+0x30/0xa0\n[  243.686440] [c000000016657cb0] [c0000000105751a8] __fput+0xc8/0x350\n[  243.686452] [c000000016657d00] [c00000001017d524] task_work_run+0xe4/0x170\n[  243.686464] [c000000016657d50] [c000000010020e94] do_notify_resume+0x134/0x140\n[  243.686478] [c000000016657d80] [c00000001002eb18] interrupt_exit_user_prepare_main+0x198/0x270\n[  243.686493] [c000000016657de0] [c00000001002ec60] syscall_exit_prepare+0x70/0x180\n[  243.686505] [c000000016657e10] [c00000001000bf7c] system_call_vectored_common+0xfc/0x280\n[  243.686520] --- interrupt: 3000 at 0x7fffa47d5ba4\n[  243.686528] NIP:  00007fffa47d5ba4 LR: 0000000000000000 CTR: 0000000000000000\n[  243.686538] REGS: c000000016657e80 TRAP: 3000   Not tainted  (6.1.0-rc1)\n[  243.686548] MSR:  800000000000d033 \u003cSF,EE,PR,ME,IR,DR,RI,LE\u003e  CR: 42044440  XER: 00000000\n[  243.686572] IRQMASK: 0\n[  243.686572] GPR00: 0000000000000006 00007ffffa606710 00007fffa48e7200 0000000000000000\n[  243.686572] GPR04: 0000000000000002 000000000000000a 0000000000000000 0000000000000001\n[  243.686572] GPR08: 000001000c172dd0 0000000000000000 0000000000000000 0000000000000000\n[  243.686572] GPR12: 0000000000000000 00007fffa4ff4bc0 0000000000000000 0000000000000000\n[  243.686572] GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000\n[  243.686572] GPR20: 0000000132dfdc50 000000000000000e 0000000000189375 0000000000000000\n[  243.686572] GPR24: 00007ffffa606ae0 0000000000000005 000001000c185490 000001000c172570\n[  243.686572] GPR28: 000001000c172990 000001000c184850 000001000c172e00 00007fffa4fedd98\n[  243.686683] NIP [00007fffa47d5ba4] 0x7fffa47d5ba4\n[  243.686691] LR [0000000000000000] 0x0\n[  243.686698] --- interrupt: 3000\n[  243.686708] INFO: task kworker/u16:1:24 blocked for more than 122 seconds.\n[  243.686717]       Not tainted 6.1.0-rc1 #1\n[  243.686724] \"echo 0 \u003e /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\n[  243.686733] task:kworker/u16:1   state:D stack:0     pid:24    ppid:2      flags:0x00000800\n[  243.686747] Workqueue: events_unbound fsnotify_mark_destroy_workfn\n[  243.686758] Call Trace:\n[  243.686762] [c0000000166736e0] [c00000004fd91000] 0xc00000004fd91000 (unreliable)\n[  243.686775] [c0000000166738d0] [c00000001001dec0] __switch_to+0x130/0x220\n[  243.686788] [c000000016673930] [c000000010f607b8] __schedule+0x1f8/0x\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:49:39.852Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2c4d26dad76eadaa45a24543e311e9ce5d09f04e"
        },
        {
          "url": "https://git.kernel.org/stable/c/c7c0bc03fa44942fe0fdc5ac52cda6e11529c0ea"
        },
        {
          "url": "https://git.kernel.org/stable/c/7f24626d6dd844bfc6d1f492d214d29c86d02550"
        }
      ],
      "title": "srcu: Delegate work to the boot cpu if using SRCU_SIZE_SMALL",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53671",
    "datePublished": "2025-10-07T15:21:28.307Z",
    "dateReserved": "2025-10-07T15:16:59.663Z",
    "dateUpdated": "2026-05-11T19:49:39.852Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2023-53671",
      "date": "2026-10-30",
      "epss": "0.00146",
      "percentile": "0.03871"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "kernel/rcu/srcutree.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
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                    "lessThan": "2c4d26dad76eadaa45a24543e311e9ce5d09f04e",
                    "status": "affected",
                    "version": "994f706872e6ce080506bd795ecf783d5b617de6",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "c7c0bc03fa44942fe0fdc5ac52cda6e11529c0ea",
                    "status": "affected",
                    "version": "994f706872e6ce080506bd795ecf783d5b617de6",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "7f24626d6dd844bfc6d1f492d214d29c86d02550",
                    "status": "affected",
                    "version": "994f706872e6ce080506bd795ecf783d5b617de6",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "kernel/rcu/srcutree.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "5.19"
                  },
                  {
                    "lessThan": "5.19",
                    "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": "A9E5492C-0786-4BD9-A043-DBAA6E28BFE6",
                    "versionEndExcluding": "6.1.16",
                    "versionStartIncluding": "5.19",
                    "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\nsrcu: Delegate work to the boot cpu if using SRCU_SIZE_SMALL\n\nCommit 994f706872e6 (\"srcu: Make Tree SRCU able to operate without\nsnp_node array\") assumes that cpu 0 is always online.  However, there\nreally are situations when some other CPU is the boot CPU, for example,\nwhen booting a kdump kernel with the maxcpus=1 boot parameter.\n\nOn PowerPC, the kdump kernel can hang as follows:\n...\n[    1.740036] systemd[1]: Hostname set to \u003cxyz.com\u003e\n[  243.686240] INFO: task systemd:1 blocked for more than 122 seconds.\n[  243.686264]       Not tainted 6.1.0-rc1 #1\n[  243.686272] \"echo 0 \u003e /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\n[  243.686281] task:systemd         state:D stack:0     pid:1     ppid:0      flags:0x00042000\n[  243.686296] Call Trace:\n[  243.686301] [c000000016657640] [c000000016657670] 0xc000000016657670 (unreliable)\n[  243.686317] [c000000016657830] [c00000001001dec0] __switch_to+0x130/0x220\n[  243.686333] [c000000016657890] [c000000010f607b8] __schedule+0x1f8/0x580\n[  243.686347] [c000000016657940] [c000000010f60bb4] schedule+0x74/0x140\n[  243.686361] [c0000000166579b0] [c000000010f699b8] schedule_timeout+0x168/0x1c0\n[  243.686374] [c000000016657a80] [c000000010f61de8] __wait_for_common+0x148/0x360\n[  243.686387] [c000000016657b20] [c000000010176bb0] __flush_work.isra.0+0x1c0/0x3d0\n[  243.686401] [c000000016657bb0] [c0000000105f2768] fsnotify_wait_marks_destroyed+0x28/0x40\n[  243.686415] [c000000016657bd0] [c0000000105f21b8] fsnotify_destroy_group+0x68/0x160\n[  243.686428] [c000000016657c40] [c0000000105f6500] inotify_release+0x30/0xa0\n[  243.686440] [c000000016657cb0] [c0000000105751a8] __fput+0xc8/0x350\n[  243.686452] [c000000016657d00] [c00000001017d524] task_work_run+0xe4/0x170\n[  243.686464] [c000000016657d50] [c000000010020e94] do_notify_resume+0x134/0x140\n[  243.686478] [c000000016657d80] [c00000001002eb18] interrupt_exit_user_prepare_main+0x198/0x270\n[  243.686493] [c000000016657de0] [c00000001002ec60] syscall_exit_prepare+0x70/0x180\n[  243.686505] [c000000016657e10] [c00000001000bf7c] system_call_vectored_common+0xfc/0x280\n[  243.686520] --- interrupt: 3000 at 0x7fffa47d5ba4\n[  243.686528] NIP:  00007fffa47d5ba4 LR: 0000000000000000 CTR: 0000000000000000\n[  243.686538] REGS: c000000016657e80 TRAP: 3000   Not tainted  (6.1.0-rc1)\n[  243.686548] MSR:  800000000000d033 \u003cSF,EE,PR,ME,IR,DR,RI,LE\u003e  CR: 42044440  XER: 00000000\n[  243.686572] IRQMASK: 0\n[  243.686572] GPR00: 0000000000000006 00007ffffa606710 00007fffa48e7200 0000000000000000\n[  243.686572] GPR04: 0000000000000002 000000000000000a 0000000000000000 0000000000000001\n[  243.686572] GPR08: 000001000c172dd0 0000000000000000 0000000000000000 0000000000000000\n[  243.686572] GPR12: 0000000000000000 00007fffa4ff4bc0 0000000000000000 0000000000000000\n[  243.686572] GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000\n[  243.686572] GPR20: 0000000132dfdc50 000000000000000e 0000000000189375 0000000000000000\n[  243.686572] GPR24: 00007ffffa606ae0 0000000000000005 000001000c185490 000001000c172570\n[  243.686572] GPR28: 000001000c172990 000001000c184850 000001000c172e00 00007fffa4fedd98\n[  243.686683] NIP [00007fffa47d5ba4] 0x7fffa47d5ba4\n[  243.686691] LR [0000000000000000] 0x0\n[  243.686698] --- interrupt: 3000\n[  243.686708] INFO: task kworker/u16:1:24 blocked for more than 122 seconds.\n[  243.686717]       Not tainted 6.1.0-rc1 #1\n[  243.686724] \"echo 0 \u003e /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\n[  243.686733] task:kworker/u16:1   state:D stack:0     pid:24    ppid:2      flags:0x00000800\n[  243.686747] Workqueue: events_unbound fsnotify_mark_destroy_workfn\n[  243.686758] Call Trace:\n[  243.686762] [c0000000166736e0] [c00000004fd91000] 0xc00000004fd91000 (unreliable)\n[  243.686775] [c0000000166738d0] [c00000001001dec0] __switch_to+0x130/0x220\n[  243.686788] [c000000016673930] [c000000010f607b8] __schedule+0x1f8/0x\n---truncated---"
          }
        ],
        "id": "CVE-2023-53671",
        "lastModified": "2026-06-17T06:45:50.390",
        "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"
            }
          ]
        },
        "published": "2025-10-07T16:15:51.000",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/2c4d26dad76eadaa45a24543e311e9ce5d09f04e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/7f24626d6dd844bfc6d1f492d214d29c86d02550"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/c7c0bc03fa44942fe0fdc5ac52cda6e11529c0ea"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-07-21T19:13:08+00:00",
      "cve": "CVE-2023-53671",
      "id": "CVE-2023-53671",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_affected": "156",
      "product_status:known_not_affected": "118",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: srcu: Delegate work to the boot cpu if using SRCU_SIZE_SMALL",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53671.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-09T01:21:52Z",
      "cve": "CVE-2023-53671",
      "id": "CVE-2023-53671",
      "initial_release_date": "2025-10-08T23:30:13Z",
      "product_status:known_not_affected": "523",
      "product_status:recommended": "58",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-53671",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-53671.json",
      "version": "11"
    }
  }
}



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Sightings

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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.

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    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.