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vxlan: use neigh_ha_snapshot() in route_shortcircuit()

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: vxlan: use neigh_ha_snapshot() in route_shortcircuit() The neighbour hardware address n->ha can be updated asynchronously by the neighbour subsystem, protected by n->ha_lock seqlock. Reading n->ha without holding the seqlock loop can lead to torn reads or reading a partially updated MAC address. Use neigh_ha_snapshot() in route_shortcircuit() to safely copy n->ha under read_seqbegin()/read_seqretry() lock protection before using it. Note that arp_reduce() and neigh_reduce() seem to have the same issue left for future patches.

Announced Source revision 1
Original source ↗

CVE-2026-74475

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-2026-74475

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": "e4f67addf158f98f8197e08974966b18480dc751",
        "lessThan": "32a9590a8d30426e3db63e6b20893e47e02576c0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e4f67addf158f98f8197e08974966b18480dc751",
        "lessThan": "d0993fc053f29e15cc7c9fe2029df3882a2ab5ab",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e4f67addf158f98f8197e08974966b18480dc751",
        "lessThan": "87210054bad82bbae6f483a742dc45722fb47a6b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e4f67addf158f98f8197e08974966b18480dc751",
        "lessThan": "d08e8ac13f2e228cc7fc3c70b5ebe71557b624a0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e4f67addf158f98f8197e08974966b18480dc751",
        "lessThan": "ec341bb76d77b4c2948764375ee6bfeef4bb41c3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e4f67addf158f98f8197e08974966b18480dc751",
        "lessThan": "ff89415d34c3ab9f5312316423122e664ed3524f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e4f67addf158f98f8197e08974966b18480dc751",
        "lessThan": "05f2987f73daa05333fd713d05546142f9f7c5f0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e4f67addf158f98f8197e08974966b18480dc751",
        "lessThan": "8eca411347e1d38964f9ed2c8d3b6ab0e7e4473d",
        "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": "3.8"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.8",
        "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-2026-74475

Source reference: /cveMetadata/cveId

Publisher severity

critical

Source reference: /containers/cna/metrics

Event
#33168 · Revision 1
Added to Heist Feed
Publisher date
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