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xfrm: hold dev ref until after transport_finish NF_HOOK

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: xfrm: hold dev ref until after transport_finish NF_HOOK After async crypto completes, xfrm_input_resume() calls dev_put() immediately on re-entry before the skb reaches transport_finish. The skb->dev pointer is then used inside NF_HOOK and its okfn, which can race with device teardown. Remove the dev_put from the async resumption entry and instead drop the reference after the NF_HOOK call in transport_finish, using a saved device pointer since NF_HOOK may consume the skb. This covers NF_DROP, NF_QUEUE and NF_STOLEN paths that skip the okfn. For non-transport exits (decaps, gro, drop) and secondary async return points, release the reference inline when async is set.

Announced Source revision 1
Original source ↗

CVE-2026-31663

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-2026-31663

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": "acf568ee859f098279eadf551612f103afdacb4e",
        "lessThan": "94439cbe478b53f92223da9aae95fffb28623c3f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "acf568ee859f098279eadf551612f103afdacb4e",
        "lessThan": "4236c30b437b80f673b9e08c8fae38b8d471ac9e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "acf568ee859f098279eadf551612f103afdacb4e",
        "lessThan": "0f451b43c88bf2b9c038b414be580efee42e031b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "acf568ee859f098279eadf551612f103afdacb4e",
        "lessThan": "5002beda5cac69d522dc54da0d5d463ed9c963d2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "acf568ee859f098279eadf551612f103afdacb4e",
        "lessThan": "1c428b03840094410c5fb6a5db30640486bbbfcb",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "69895c5ea0ca2e8d7de1e6d36965d0ab9730787f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "833760100588acfb267dac4d6a02ab9931237739",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e095ecaec6d94aa2156cceb98a85d409b51190f3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "3.2.100",
        "lessThan": "3.3",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "3.16.55",
        "lessThan": "3.17",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "4.14.24",
        "lessThan": "4.15",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "net/ipv4/xfrm4_input.c",
      "net/ipv6/xfrm6_input.c",
      "net/xfrm/xfrm_input.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.15"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.15",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.6.160",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.94",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.23",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19.13",
        "versionType": "semver",
        "lessThanOrEqual": "6.19.*"
      },
      {
        "status": "unaffected",
        "version": "7.0",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/ipv4/xfrm4_input.c",
      "net/ipv6/xfrm6_input.c",
      "net/xfrm/xfrm_input.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-31663

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#46237 · Revision 1
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Publisher date
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