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xdp: fix zero-copy frame layout

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: xdp: fix zero-copy frame layout xdp_convert_zc_to_xdp_frame() clones an XSK packet into an order-0 page and advertises PAGE_SIZE as its frame size. It allows the copied frame to occupy the page tail needed by skb_shared_info and records zero headroom even when metadata separates the frame header from packet data. An AF_XDP zero-copy packet redirected through cpumap can therefore make the skb overlap skb_shared_info or place it beyond the allocated page. Limit the copied layout to SKB_WITH_OVERHEAD(PAGE_SIZE) and include the metadata length in frame headroom. Redirect callers already handle a NULL conversion result. BUG: KASAN: slab-out-of-bounds in skb_gro_receive Write of size 4 at addr ffff88800cf37004 by task cpumap/1/map:1/146 Call Trace: skb_gro_receive (net/core/gro.c:174) udp_gro_receive (net/ipv4/udp_offload.c:812) inet_gro_receive (net/ipv4/af_inet.c:1539) dev_gro_receive (net/core/gro.c:515) gro_receive_skb (net/core/gro.c:633) cpu_map_kthread_run (kernel/bpf/cpumap.c:395) kthread (kernel/kthread.c:436) ret_from_fork (arch/x86/kernel/process.c:164) ret_from_fork_asm (arch/x86/entry/entry_64.S:255) Kernel panic - not syncing: KASAN: panic_on_warn set ...

Announced Source revision 1
Original source ↗

CVE-2026-81002

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-2026-81002

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": "b0d1beeff2a97a0cf1965ea8f1d13b8973f22582",
        "lessThan": "dcb6db9ca6515fcd3e00c93ec5e27dc7a0a7012f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b0d1beeff2a97a0cf1965ea8f1d13b8973f22582",
        "lessThan": "22092730129077c302d8c947bbe0876f0280c528",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b0d1beeff2a97a0cf1965ea8f1d13b8973f22582",
        "lessThan": "ced3e18cd9b9caf630aaa1e1eac305f5192ba896",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b0d1beeff2a97a0cf1965ea8f1d13b8973f22582",
        "lessThan": "6de17275b3ccdf9887568b07e54da2e3597217cf",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b0d1beeff2a97a0cf1965ea8f1d13b8973f22582",
        "lessThan": "444216dacdbebd3e52d5e704facafbb230da09e9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b0d1beeff2a97a0cf1965ea8f1d13b8973f22582",
        "lessThan": "15d1f3c0dbe7a740f779337deb39f23cd8d002c8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b0d1beeff2a97a0cf1965ea8f1d13b8973f22582",
        "lessThan": "68d7cc5512238693670fc19c7a615df631e10edf",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b0d1beeff2a97a0cf1965ea8f1d13b8973f22582",
        "lessThan": "71283aaa6c65b3cec84caf1dc78560985737641f",
        "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": "4.20"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.20",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.270",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.109",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.50",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.4",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/core/xdp.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-81002

Source reference: /cveMetadata/cveId

Publisher severity

critical

Source reference: /containers/cna/metrics

Event
#34958 · Revision 1
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Publisher date
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