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vxlan: re-fetch eth header after route_shortcircuit()

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: vxlan: re-fetch eth header after route_shortcircuit() Before route_shortcircuit(), the eth header pointer is cached from eth_hdr(skb). Inside route_shortcircuit(), pskb_may_pull() can be called, which may reallocate skb->head. In this case, returning to vxlan_xmit() leaves the cached eth pointer pointing to freed memory, leading to a use-after-free when dereferencing eth->h_dest. Fix this by updating eth = eth_hdr(skb) after calling route_shortcircuit().

Announced Source revision 1
Original source ↗

CVE-2026-80681

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-80681

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "ae8840825605f36f98f247323edc150e761cb64e",
        "lessThan": "6375093eb45cd7d89f1945f939eeae3b29d79f56",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ae8840825605f36f98f247323edc150e761cb64e",
        "lessThan": "1b7f7b653e3557690047c62f03b80a24ea5a58a5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ae8840825605f36f98f247323edc150e761cb64e",
        "lessThan": "bf045341dfb3e767f0ff94cf240ce3c371973bd4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ae8840825605f36f98f247323edc150e761cb64e",
        "lessThan": "2355c8c26d2aa1b4385b369e67202e47d460d555",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ae8840825605f36f98f247323edc150e761cb64e",
        "lessThan": "1511631b7cfc4152b10a0a9d04c7a0bf2ddf4585",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ae8840825605f36f98f247323edc150e761cb64e",
        "lessThan": "1235e017aa11cf01e91b613c4c5ed6aa28934fff",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ae8840825605f36f98f247323edc150e761cb64e",
        "lessThan": "c9dceac9e1c7c772c43c732fc0d325e72835801a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "ae8840825605f36f98f247323edc150e761cb64e",
        "lessThan": "1395a676ec15a0a02a2a6d86602324f2d5fd41d5",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/net/vxlan/vxlan_core.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.10"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.10",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.265",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.216",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.183",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.151",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.103",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.44",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.8",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/net/vxlan/vxlan_core.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-80681

Source reference: /cveMetadata/cveId

Publisher severity

critical

Source reference: /containers/cna/metrics

Event
#34355 · Revision 1
Added to Heist Feed
Publisher date
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