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xdp: reject clones that overrun skb_shared_info tailroom

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: xdp: reject clones that overrun skb_shared_info tailroom xdpf_clone() clones broadcast copies into a single page and sets frame_sz to PAGE_SIZE. __xdp_build_skb_from_frame() later treats that page like a normal XDP frame and expects the usual skb_shared_info tailroom at the end of the buffer. The current check only rejects frames whose linear xdp_frame header, headroom, and packet data exceed PAGE_SIZE. A source frame backed by a larger allocation can still satisfy that check while extending into the clone's required shared-info area. When such a clone is converted back into an skb, build_skb_around() places skb_shared_info over live packet bytes and later writes can corrupt XDP return metadata. Reject clones unless their linear area fits inside SKB_WITH_OVERHEAD(PAGE_SIZE), matching the tailroom requirement already enforced by the XDP-to-skb conversion path.

Announced Source revision 1
Original source ↗

CVE-2026-74616

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-2026-74616

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": "e624d4ed4aa8cc3c69d1359b0aaea539203ed266",
        "lessThan": "58408982fa39f9758124cec169f42854d6f98f35",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e624d4ed4aa8cc3c69d1359b0aaea539203ed266",
        "lessThan": "685edea27ac68d08fe4dbd3de74b858d2ad8e830",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e624d4ed4aa8cc3c69d1359b0aaea539203ed266",
        "lessThan": "ba13763d667e008e185fedf592d53846a5b457d1",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e624d4ed4aa8cc3c69d1359b0aaea539203ed266",
        "lessThan": "ef4b7c7046d29a67090de15af0da0d1ae8d1b192",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e624d4ed4aa8cc3c69d1359b0aaea539203ed266",
        "lessThan": "fab820f1691a9e26d9031f18aae1e9ce09078f92",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e624d4ed4aa8cc3c69d1359b0aaea539203ed266",
        "lessThan": "f463b6f4957c9c3fd1c75f8d3e5af4879fa609c0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e624d4ed4aa8cc3c69d1359b0aaea539203ed266",
        "lessThan": "e48e8edbef2eb824201495daa5234560f632b23c",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/core/xdp.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.14"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.14",
        "versionType": "semver"
      },
      {
        "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": "6.6.152",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.104",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.45",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.9",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/core/xdp.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-74616

Source reference: /cveMetadata/cveId

Publisher severity

critical

Source reference: /containers/cna/metrics

Event
#33242 · Revision 1
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Publisher date
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