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soc: fsl: qbman: fix race condition in qman_destroy_fq

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: soc: fsl: qbman: fix race condition in qman_destroy_fq When QMAN_FQ_FLAG_DYNAMIC_FQID is set, there's a race condition between fq_table[fq->idx] state and freeing/allocating from the pool and WARN_ON(fq_table[fq->idx]) in qman_create_fq() gets triggered. Indeed, we can have: Thread A Thread B qman_destroy_fq() qman_create_fq() qman_release_fqid() qman_shutdown_fq() gen_pool_free() -- At this point, the fqid is available again -- qman_alloc_fqid() -- so, we can get the just-freed fqid in thread B -- fq->fqid = fqid; fq->idx = fqid * 2; WARN_ON(fq_table[fq->idx]); fq_table[fq->idx] = fq; fq_table[fq->idx] = NULL; And adding some logs between qman_release_fqid() and fq_table[fq->idx] = NULL makes the WARN_ON() trigger a lot more. To prevent that, ensure that fq_table[fq->idx] is set to NULL before gen_pool_free() is called by using smp_wmb().

Announced Source revision 1
Original source ↗

CVE-2026-23463

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-2026-23463

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": "c535e923bb97a4b361e89a6383693482057f8b0c",
        "lessThan": "66442cf9989bd4489fa80d9f37637d58ab016835",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c535e923bb97a4b361e89a6383693482057f8b0c",
        "lessThan": "d288fbe652ef43b7128e4bc0c0c2ef6bd03a2210",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c535e923bb97a4b361e89a6383693482057f8b0c",
        "lessThan": "9e3d47904b8153c8c3ad2f9b66d5008aad677aa8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c535e923bb97a4b361e89a6383693482057f8b0c",
        "lessThan": "d21923a8059fa896bfef016f55dd769299335cb4",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c535e923bb97a4b361e89a6383693482057f8b0c",
        "lessThan": "751f60bd48edaf03f9d84ab09e5ce6705757d50f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c535e923bb97a4b361e89a6383693482057f8b0c",
        "lessThan": "85dbbf7dc88b0a54f2e334daedf6f3f31fd004fa",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c535e923bb97a4b361e89a6383693482057f8b0c",
        "lessThan": "265e56714635c5dd1e5964bfd97fa6e73f62cde5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "c535e923bb97a4b361e89a6383693482057f8b0c",
        "lessThan": "014077044e874e270ec480515edbc1cadb976cf2",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/soc/fsl/qbman/qman.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.9"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.9",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.253",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.203",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.167",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.130",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.78",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.20",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19.10",
        "versionType": "semver",
        "lessThanOrEqual": "6.19.*"
      },
      {
        "status": "unaffected",
        "version": "7.0",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/soc/fsl/qbman/qman.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-23463

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#27257 · Revision 1
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