Vulnerability-Lookup

FKIE_CVE-2026-23463

Vulnerability from fkie_nvd - Published: 2026-04-03 16:16 - Updated: 2026-05-20 15:25

Severity

4.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

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().

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/014077044e874e270ec480515edbc1cadb976cf2	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/265e56714635c5dd1e5964bfd97fa6e73f62cde5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/66442cf9989bd4489fa80d9f37637d58ab016835	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/751f60bd48edaf03f9d84ab09e5ce6705757d50f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/85dbbf7dc88b0a54f2e334daedf6f3f31fd004fa	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9e3d47904b8153c8c3ad2f9b66d5008aad677aa8	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d21923a8059fa896bfef016f55dd769299335cb4	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d288fbe652ef43b7128e4bc0c0c2ef6bd03a2210	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

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CVE-2026-23463 (GCVE-0-2026-23463)

Vulnerability from cvelistv5 – Published: 2026-04-03 15:15 – Updated: 2026-05-11 22:07

Title

soc: fsl: qbman: fix race condition in qman_destroy_fq

Summary

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/66442cf9989bd4489…
https://git.kernel.org/stable/c/d288fbe652ef43b71…
https://git.kernel.org/stable/c/9e3d47904b8153c8c…
https://git.kernel.org/stable/c/d21923a8059fa896b…
https://git.kernel.org/stable/c/751f60bd48edaf03f…
https://git.kernel.org/stable/c/85dbbf7dc88b0a54f…
https://git.kernel.org/stable/c/265e56714635c5dd1…
https://git.kernel.org/stable/c/014077044e874e270…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: c535e923bb97a4b361e89a6383693482057f8b0c , < 66442cf9989bd4489fa80d9f37637d58ab016835 (git) Affected: c535e923bb97a4b361e89a6383693482057f8b0c , < d288fbe652ef43b7128e4bc0c0c2ef6bd03a2210 (git) Affected: c535e923bb97a4b361e89a6383693482057f8b0c , < 9e3d47904b8153c8c3ad2f9b66d5008aad677aa8 (git) Affected: c535e923bb97a4b361e89a6383693482057f8b0c , < d21923a8059fa896bfef016f55dd769299335cb4 (git) Affected: c535e923bb97a4b361e89a6383693482057f8b0c , < 751f60bd48edaf03f9d84ab09e5ce6705757d50f (git) Affected: c535e923bb97a4b361e89a6383693482057f8b0c , < 85dbbf7dc88b0a54f2e334daedf6f3f31fd004fa (git) Affected: c535e923bb97a4b361e89a6383693482057f8b0c , < 265e56714635c5dd1e5964bfd97fa6e73f62cde5 (git) Affected: c535e923bb97a4b361e89a6383693482057f8b0c , < 014077044e874e270ec480515edbc1cadb976cf2 (git)
Linux	Linux	Affected: 4.9 Unaffected: 0 , < 4.9 (semver) Unaffected: 5.10.253 , ≤ 5.10.* (semver) Unaffected: 5.15.203 , ≤ 5.15.* (semver) Unaffected: 6.1.167 , ≤ 6.1.* (semver) Unaffected: 6.6.130 , ≤ 6.6.* (semver) Unaffected: 6.12.78 , ≤ 6.12.* (semver) Unaffected: 6.18.20 , ≤ 6.18.* (semver) Unaffected: 6.19.10 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
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        {
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          "product": "Linux",
          "programFiles": [
            "drivers/soc/fsl/qbman/qman.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsoc: fsl: qbman: fix race condition in qman_destroy_fq\n\nWhen QMAN_FQ_FLAG_DYNAMIC_FQID is set, there\u0027s a race condition between\nfq_table[fq-\u003eidx] state and freeing/allocating from the pool and\nWARN_ON(fq_table[fq-\u003eidx]) in qman_create_fq() gets triggered.\n\nIndeed, we can have:\n         Thread A                             Thread B\n    qman_destroy_fq()                    qman_create_fq()\n      qman_release_fqid()\n        qman_shutdown_fq()\n        gen_pool_free()\n           -- At this point, the fqid is available again --\n                                           qman_alloc_fqid()\n           -- so, we can get the just-freed fqid in thread B --\n                                           fq-\u003efqid = fqid;\n                                           fq-\u003eidx = fqid * 2;\n                                           WARN_ON(fq_table[fq-\u003eidx]);\n                                           fq_table[fq-\u003eidx] = fq;\n     fq_table[fq-\u003eidx] = NULL;\n\nAnd adding some logs between qman_release_fqid() and\nfq_table[fq-\u003eidx] = NULL makes the WARN_ON() trigger a lot more.\n\nTo prevent that, ensure that fq_table[fq-\u003eidx] is set to NULL before\ngen_pool_free() is called by using smp_wmb()."
        }
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        },
        {
          "url": "https://git.kernel.org/stable/c/014077044e874e270ec480515edbc1cadb976cf2"
        }
      ],
      "title": "soc: fsl: qbman: fix race condition in qman_destroy_fq",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23463",
    "datePublished": "2026-04-03T15:15:42.411Z",
    "dateReserved": "2026-01-13T15:37:46.021Z",
    "dateUpdated": "2026-05-11T22:07:28.689Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-23463

CVE-2026-23463 (GCVE-0-2026-23463)

Tags

Sightings

Nomenclature