Vulnerability-Lookup

FKIE_CVE-2024-26665

Vulnerability from fkie_nvd - Published: 2024-04-02 07:15 - Updated: 2026-08-04 11:16

Severity

9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: tunnels: fix out of bounds access when building IPv6 PMTU error If the ICMPv6 error is built from a non-linear skb we get the following splat, BUG: KASAN: slab-out-of-bounds in do_csum+0x220/0x240 Read of size 4 at addr ffff88811d402c80 by task netperf/820 CPU: 0 PID: 820 Comm: netperf Not tainted 6.8.0-rc1+ #543 ... kasan_report+0xd8/0x110 do_csum+0x220/0x240 csum_partial+0xc/0x20 skb_tunnel_check_pmtu+0xeb9/0x3280 vxlan_xmit_one+0x14c2/0x4080 vxlan_xmit+0xf61/0x5c00 dev_hard_start_xmit+0xfb/0x510 __dev_queue_xmit+0x7cd/0x32a0 br_dev_queue_push_xmit+0x39d/0x6a0 Use skb_checksum instead of csum_partial who cannot deal with non-linear SKBs.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/510c869ffa4068c5f19ff4df51d1e2f3a30aaac1	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7dc9feb8b1705cf00de20563b6bc4831f4c99dab	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d75abeec401f8c86b470e7028a13fcdc87e5dd06	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d964dd1bc1452594b4207d9229c157d9386e5d8a	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e37cde7a5716466ff2a76f7f27f0a29b05b9a732	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e77bf828f1ca1c47fcff58bdc26b60a9d3dfbe1d	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/510c869ffa4068c5f19ff4df51d1e2f3a30aaac1	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/7dc9feb8b1705cf00de20563b6bc4831f4c99dab	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/d75abeec401f8c86b470e7028a13fcdc87e5dd06	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/d964dd1bc1452594b4207d9229c157d9386e5d8a	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/e37cde7a5716466ff2a76f7f27f0a29b05b9a732	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/e77bf828f1ca1c47fcff58bdc26b60a9d3dfbe1d	Patch
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html	Mailing List

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.8
linux	linux_kernel	6.8
linux	linux_kernel	6.8
debian	debian_linux	10.0

JSON

To clipboard

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          "programFiles": [
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntunnels: fix out of bounds access when building IPv6 PMTU error\n\nIf the ICMPv6 error is built from a non-linear skb we get the following\nsplat,\n\n  BUG: KASAN: slab-out-of-bounds in do_csum+0x220/0x240\n  Read of size 4 at addr ffff88811d402c80 by task netperf/820\n  CPU: 0 PID: 820 Comm: netperf Not tainted 6.8.0-rc1+ #543\n  ...\n   kasan_report+0xd8/0x110\n   do_csum+0x220/0x240\n   csum_partial+0xc/0x20\n   skb_tunnel_check_pmtu+0xeb9/0x3280\n   vxlan_xmit_one+0x14c2/0x4080\n   vxlan_xmit+0xf61/0x5c00\n   dev_hard_start_xmit+0xfb/0x510\n   __dev_queue_xmit+0x7cd/0x32a0\n   br_dev_queue_push_xmit+0x39d/0x6a0\n\nUse skb_checksum instead of csum_partial who cannot deal with non-linear\nSKBs."
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: t\u00faneles: corrige el acceso fuera de los l\u00edmites al compilar el error IPv6 PMTU Si el error ICMPv6 se genera a partir de un skb no lineal, obtenemos el siguiente s\u00edmbolo, ERROR: KASAN: slab-out- fuera de los l\u00edmites en do_csum+0x220/0x240 Lectura de tama\u00f1o 4 en la direcci\u00f3n ffff88811d402c80 por tarea netperf/820 CPU: 0 PID: 820 Comm: netperf Not tainted 6.8.0-rc1+ #543 ... kasan_report+0xd8/0x110 do_csum+0x220 /0x240 csum_partial+0xc/0x20 skb_tunnel_check_pmtu+0xeb9/0x3280 vxlan_xmit_one+0x14c2/0x4080 vxlan_xmit+0xf61/0x5c00 dev_hard_start_xmit+0xfb/0x510 __dev_queue_xmit+0x7cd/0x32 a0 br_dev_queue_push_xmit+0x39d/0x6a0 Utilice skb_checksum en lugar de csum_partial, que no puede manejar SKB no lineales."
    }
  ],
  "id": "CVE-2024-26665",
  "lastModified": "2026-08-04T11:16:55.497",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.1,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.2,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
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          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.1,
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          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
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        "source": "nvd@nist.gov",
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-26665",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-09-10T15:53:43.558193Z",
          "version": "2.0.3"
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  "published": "2024-04-02T07:15:43.430",
  "references": [
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
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          "lang": "en",
          "value": "CWE-125"
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      "source": "nvd@nist.gov",
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  ]
}

CVE-2024-26665 (GCVE-0-2024-26665)

Vulnerability from cvelistv5 – Published: 2024-04-02 06:22 – Updated: 2026-08-05 11:26

Title

tunnels: fix out of bounds access when building IPv6 PMTU error

Summary

Severity

9.1 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-09-10 15:53 UTC

Assigner

Linux CNA under the mitre root

CNA scorecard D 54/100 over 6618 records in the last 180 days details

References

7 references

URL	Tags
https://git.kernel.org/stable/c/e77bf828f1ca1c47f…
https://git.kernel.org/stable/c/d964dd1bc1452594b…
https://git.kernel.org/stable/c/e37cde7a5716466ff…
https://git.kernel.org/stable/c/510c869ffa4068c5f…
https://git.kernel.org/stable/c/7dc9feb8b1705cf00…
https://git.kernel.org/stable/c/d75abeec401f8c86b…
https://lists.debian.org/debian-lts-announce/2024…	x_transferred

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 4cb47a8644cc9eb8ec81190a50e79e6530d0297f , < e77bf828f1ca1c47fcff58bdc26b60a9d3dfbe1d (git) Affected: 4cb47a8644cc9eb8ec81190a50e79e6530d0297f , < d964dd1bc1452594b4207d9229c157d9386e5d8a (git) Affected: 4cb47a8644cc9eb8ec81190a50e79e6530d0297f , < e37cde7a5716466ff2a76f7f27f0a29b05b9a732 (git) Affected: 4cb47a8644cc9eb8ec81190a50e79e6530d0297f , < 510c869ffa4068c5f19ff4df51d1e2f3a30aaac1 (git) Affected: 4cb47a8644cc9eb8ec81190a50e79e6530d0297f , < 7dc9feb8b1705cf00de20563b6bc4831f4c99dab (git) Affected: 4cb47a8644cc9eb8ec81190a50e79e6530d0297f , < d75abeec401f8c86b470e7028a13fcdc87e5dd06 (git)
Linux	Linux	Affected: 5.9 Unaffected: 0 , < 5.9 (semver) Unaffected: 5.10.210 , ≤ 5.10.* (semver) Unaffected: 5.15.149 , ≤ 5.15.* (semver) Unaffected: 6.1.78 , ≤ 6.1.* (semver) Unaffected: 6.6.17 , ≤ 6.6.* (semver) Unaffected: 6.7.5 , ≤ 6.7.* (semver) Unaffected: 6.8 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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            "url": "https://git.kernel.org/stable/c/d75abeec401f8c86b470e7028a13fcdc87e5dd06"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-26665",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T15:53:43.558193Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-11T17:33:39.284Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/ip_tunnel_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e77bf828f1ca1c47fcff58bdc26b60a9d3dfbe1d",
              "status": "affected",
              "version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f",
              "versionType": "git"
            },
            {
              "lessThan": "d964dd1bc1452594b4207d9229c157d9386e5d8a",
              "status": "affected",
              "version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f",
              "versionType": "git"
            },
            {
              "lessThan": "e37cde7a5716466ff2a76f7f27f0a29b05b9a732",
              "status": "affected",
              "version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f",
              "versionType": "git"
            },
            {
              "lessThan": "510c869ffa4068c5f19ff4df51d1e2f3a30aaac1",
              "status": "affected",
              "version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f",
              "versionType": "git"
            },
            {
              "lessThan": "7dc9feb8b1705cf00de20563b6bc4831f4c99dab",
              "status": "affected",
              "version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f",
              "versionType": "git"
            },
            {
              "lessThan": "d75abeec401f8c86b470e7028a13fcdc87e5dd06",
              "status": "affected",
              "version": "4cb47a8644cc9eb8ec81190a50e79e6530d0297f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/ipv4/ip_tunnel_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.9"
            },
            {
              "lessThan": "5.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.210",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.149",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.78",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.17",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.7.*",
              "status": "unaffected",
              "version": "6.7.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.8",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.210",
                  "versionStartIncluding": "5.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.149",
                  "versionStartIncluding": "5.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.78",
                  "versionStartIncluding": "5.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.17",
                  "versionStartIncluding": "5.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.7.5",
                  "versionStartIncluding": "5.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.8",
                  "versionStartIncluding": "5.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntunnels: fix out of bounds access when building IPv6 PMTU error\n\nIf the ICMPv6 error is built from a non-linear skb we get the following\nsplat,\n\n  BUG: KASAN: slab-out-of-bounds in do_csum+0x220/0x240\n  Read of size 4 at addr ffff88811d402c80 by task netperf/820\n  CPU: 0 PID: 820 Comm: netperf Not tainted 6.8.0-rc1+ #543\n  ...\n   kasan_report+0xd8/0x110\n   do_csum+0x220/0x240\n   csum_partial+0xc/0x20\n   skb_tunnel_check_pmtu+0xeb9/0x3280\n   vxlan_xmit_one+0x14c2/0x4080\n   vxlan_xmit+0xf61/0x5c00\n   dev_hard_start_xmit+0xfb/0x510\n   __dev_queue_xmit+0x7cd/0x32a0\n   br_dev_queue_push_xmit+0x39d/0x6a0\n\nUse skb_checksum instead of csum_partial who cannot deal with non-linear\nSKBs."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.1,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The overread is triggered by an ordinary over-MTU IPv6 packet forwarded out a VXLAN/Geneve device enslaved to a bridge or OVS port, a standard cloud/container overlay topology. The L3 source address is unconstrained (only unspecified/multicast/loopback sources are filtered), so an off-link remote sender whose packet is routed to a workload behind the overlay reaches the vulnerable code.\nAC:L - The attacker only needs to send an IPv6 packet larger than the tunnel\u0027s inner MTU; non-linear skbs are the normal case for large frames under GRO, header-split NICs, and virtio-net mergeable buffers, and the reporter reproduced it with plain netperf traffic. No memory-layout luck or attacker-uncontrollable state is required.\nPR:N - There is no capability check, authentication, or credential gate anywhere on the receive-and-bridge-to-tunnel path \u2014 the packet is simply forwarded and the ICMPv6 error is built. The attacker needs no account or privileges on the affected host.\nUI:N - Exploitation is entirely packet-driven and happens inside softirq/xmit context with no victim participation. No administrator or user action is needed once the standard bridged-tunnel configuration is in place.\nS:U - The out-of-bounds read and its consequences are confined to the host kernel that contains the defective checksum call. The vulnerable and impacted components are the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - csum_partial() reads a fixed 1240 bytes from a linear buffer that may hold only tens of bytes, overreading up to roughly a kilobyte of adjacent kernel slab memory \u2014 far beyond a \"few bytes.\" Worse, the folded result is placed in the ICMPv6 checksum field and transmitted back to the attacker, yielding a repeatable oracle over kernel heap contents that heap grooming can turn into a real disclosure.\nI:N - The defect is a read-only overrun; no kernel memory is written, no bounds are exceeded on a store, and there is no type confusion or control-flow influence. The only consequence for state is an incorrect checksum on an outgoing packet, which the receiver discards.\nA:H - Reading up to ~1KB past the end of a slab allocation can walk off the backing pages into unmapped memory, faulting in softirq context and oopsing the kernel. On KASAN or panic_on_oops/hardened kernels the access panics the machine outright, and the attacker can repeat it at will with a stream of oversized packets."
            }
          ]
        }
      ],
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        "dateUpdated": "2026-08-05T11:26:39.967Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e77bf828f1ca1c47fcff58bdc26b60a9d3dfbe1d"
        },
        {
          "url": "https://git.kernel.org/stable/c/d964dd1bc1452594b4207d9229c157d9386e5d8a"
        },
        {
          "url": "https://git.kernel.org/stable/c/e37cde7a5716466ff2a76f7f27f0a29b05b9a732"
        },
        {
          "url": "https://git.kernel.org/stable/c/510c869ffa4068c5f19ff4df51d1e2f3a30aaac1"
        },
        {
          "url": "https://git.kernel.org/stable/c/7dc9feb8b1705cf00de20563b6bc4831f4c99dab"
        },
        {
          "url": "https://git.kernel.org/stable/c/d75abeec401f8c86b470e7028a13fcdc87e5dd06"
        }
      ],
      "title": "tunnels: fix out of bounds access when building IPv6 PMTU error",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26665",
    "datePublished": "2024-04-02T06:22:14.264Z",
    "dateReserved": "2024-02-19T14:20:24.149Z",
    "dateUpdated": "2026-08-05T11:26:39.967Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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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.

Action not permitted

FKIE_CVE-2024-26665

CVE-2024-26665 (GCVE-0-2024-26665)

Tags

Sightings

Nomenclature

Related by attack behaviour