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bpf, sockmap: Fix self-redirect copied_seq double-counting

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Fix self-redirect copied_seq double-counting When a BPF stream_verdict program redirects an skb back to the same socket (self-redirect with BPF_F_INGRESS), sk_psock_verdict_apply() calls tcp_eat_skb() which advances tcp_sk->copied_seq. However, the skb is then delivered to the socket's psock ingress queue and later read by tcp_bpf_recvmsg_parser(), which also advances copied_seq via the copied_from_self accounting path. This double-counting causes copied_seq to advance by 2x the actual data length, triggering: TCP recvmsg seq # bug 2: copied BF2E806, seq BF2E7FD, \ rcvnxt BF2E806, fl 0 WARNING: net/ipv4/tcp.c:2745 at tcp_recvmsg_locked+0x72b/0x2640 Call Trace: tcp_recvmsg+0x10a/0x500 sock_recvmsg+0x168/0x1d0 __sys_recvfrom+0x19a/0x2a0 __x64_sys_recvfrom+0xe4/0x1f0 do_syscall_64+0xf7/0x530 entry_SYSCALL_64_after_hwframe+0x77/0x7f cleanup rbuf bug: copied BF2E806 seq BF2E806 rcvnxt BF2E806 WARNING: net/ipv4/tcp.c:1609 at tcp_cleanup_rbuf+0xf2/0x1c0 Call Trace: tcp_recvmsg_locked+0x8d1/0x2640 tcp_recvmsg+0x10a/0x500 sock_recvmsg+0x168/0x1d0 __sys_recvfrom+0x19a/0x2a0 __x64_sys_recvfrom+0xe4/0x1f0 do_syscall_64+0xf7/0x530 entry_SYSCALL_64_after_hwframe+0x77/0x7f Fix this by converting self-redirect verdict to __SK_PASS at the beginning of sk_psock_verdict_apply(). This bypasses the __SK_REDIRECT case entirely (which calls sk_psock_eat_skb), letting the __SK_PASS path queue the skb to the psock ingre

Announced Source revision 1
Original source ↗

CVE-2026-98925

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-2026-98925

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": "fe735073a50eaa71aceb2e990827fe26f33cddd6",
        "lessThan": "cf9aefb26a071cb8b6fdd761c27e022a1184946d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e5c6de5fa025882babf89cecbed80acf49b987fa",
        "lessThan": "dc98def81e3c629e25fcdd5753b1db93aab27ce9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e5c6de5fa025882babf89cecbed80acf49b987fa",
        "lessThan": "ef6f2182fee6b9721c005ccfc6aec0a47f79bbfa",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e5c6de5fa025882babf89cecbed80acf49b987fa",
        "lessThan": "ae1ffd04e98beefbe5d83335d506b0bcd5c2a6b3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e5c6de5fa025882babf89cecbed80acf49b987fa",
        "lessThan": "88942054191185c6f8bea5568cbb5614d1e99af9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e5c6de5fa025882babf89cecbed80acf49b987fa",
        "lessThan": "490a83d6386eec1d29f470c8d7331677fb46c3b7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f9b4a0b537be7a6e5f002ca64b09dcca9c14e6ed",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6.1.32",
        "lessThan": "6.1.189",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.3.6",
        "lessThan": "6.4",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "net/core/skmsg.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6.4"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "6.4",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.1.189",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.158",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.112",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.55",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.9",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/core/skmsg.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-98925

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#52786 · Revision 1
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Publisher date
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