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tipc: avoid use-after-free in poll trace queue dumps

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: tipc: avoid use-after-free in poll trace queue dumps TIPC socket tracepoints dump queue state through tipc_sk_dump(). Most queue-dump callsites already serialize that walk under the socket lock or sk->sk_lock.slock, but tipc_poll() calls trace_tipc_sk_poll(..., TIPC_DUMP_ALL, ...) without holding either lock. That lets the poll trace path reach tipc_list_dump() and backlog head/tail dumping while another context dequeues and frees an skb, leaving the trace helper dereferencing a stale queue entry. Stop the unlocked poll trace site from requesting queue dumps. Other queue dump trace callsites keep their existing output under the locking they already provide, while poll still emits the event itself without walking live queue members from an unlocked context.

Announced Source revision 1
Original source ↗

CVE-2026-74490

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-2026-74490

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": "b4b9771bcbbd5839b0f77aba55e2f85989ed6779",
        "lessThan": "3cd57c6b210d50fd1f7ac1720442ba5be5dc94f8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b4b9771bcbbd5839b0f77aba55e2f85989ed6779",
        "lessThan": "ae7fc824970888b4fdaa076819c9a6f2fcede275",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b4b9771bcbbd5839b0f77aba55e2f85989ed6779",
        "lessThan": "78706367fe1b98aee0a6de27c62b7f1e3035f38d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b4b9771bcbbd5839b0f77aba55e2f85989ed6779",
        "lessThan": "d7940bb6a8e7ab28f972c2875cb05783216312dc",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b4b9771bcbbd5839b0f77aba55e2f85989ed6779",
        "lessThan": "5e82beba4bc1f91d0e64c9c43f2b2fa9cd1c2a7d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b4b9771bcbbd5839b0f77aba55e2f85989ed6779",
        "lessThan": "bed792737b5f1ba773054dbe984502958bdfe6ce",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b4b9771bcbbd5839b0f77aba55e2f85989ed6779",
        "lessThan": "ac2f787980fdf4364cd5651a4c8128e59b8de3aa",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b4b9771bcbbd5839b0f77aba55e2f85989ed6779",
        "lessThan": "b4f1719dfea023220e0e6bd892b087d76b2a6a49",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/tipc/socket.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.0"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.0",
        "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": [
      "net/tipc/socket.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-74490

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#33177 · Revision 1
Added to Heist Feed
Publisher date
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