CVE-2026-23463soc: fsl: qbman: fix race condition in qman_destroy_fq
- 4.7MediumCVSS base score
- 0.10%Exploitation in 30 daysEPSS · top 99% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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().
Timeline
ID reserved
By Linux
- 3 months later
· 3 months later
Published
- 7 months later
· 7 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | Medium4.7 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.10% · top 99% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.7.
Affected products
- affected c535e923bb97a4b361e89a6383693482057f8b0c – < 66442cf9989bd4489fa80d9f37637d58ab016835
- affected c535e923bb97a4b361e89a6383693482057f8b0c – < d288fbe652ef43b7128e4bc0c0c2ef6bd03a2210
- affected c535e923bb97a4b361e89a6383693482057f8b0c – < 9e3d47904b8153c8c3ad2f9b66d5008aad677aa8
- affected c535e923bb97a4b361e89a6383693482057f8b0c – < d21923a8059fa896bfef016f55dd769299335cb4
- affected c535e923bb97a4b361e89a6383693482057f8b0c – < 751f60bd48edaf03f9d84ab09e5ce6705757d50f
- affected c535e923bb97a4b361e89a6383693482057f8b0c – < 85dbbf7dc88b0a54f2e334daedf6f3f31fd004fa
- affected c535e923bb97a4b361e89a6383693482057f8b0c – < 265e56714635c5dd1e5964bfd97fa6e73f62cde5
- affected c535e923bb97a4b361e89a6383693482057f8b0c – < 014077044e874e270ec480515edbc1cadb976cf2
- affected 4.9
- unaffected < 4.9
- unaffected 5.10.253 – ≤ 5.10.*
- unaffected 5.15.203 – ≤ 5.15.*
- unaffected 6.1.167 – ≤ 6.1.*
- unaffected 6.6.130 – ≤ 6.6.*
- unaffected 6.12.78 – ≤ 6.12.*
- unaffected 6.18.20 – ≤ 6.18.*
- unaffected 6.19.10 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References11
- https://git.kernel.org/stable/c/66442cf9989bd4489fa80d9f37637d58ab016835 (opens in a new tab)
- https://git.kernel.org/stable/c/d288fbe652ef43b7128e4bc0c0c2ef6bd03a2210 (opens in a new tab)
- https://git.kernel.org/stable/c/9e3d47904b8153c8c3ad2f9b66d5008aad677aa8 (opens in a new tab)
- https://git.kernel.org/stable/c/d21923a8059fa896bfef016f55dd769299335cb4 (opens in a new tab)
- https://git.kernel.org/stable/c/751f60bd48edaf03f9d84ab09e5ce6705757d50f (opens in a new tab)
- https://git.kernel.org/stable/c/85dbbf7dc88b0a54f2e334daedf6f3f31fd004fa (opens in a new tab)
- https://git.kernel.org/stable/c/265e56714635c5dd1e5964bfd97fa6e73f62cde5 (opens in a new tab)
- https://git.kernel.org/stable/c/014077044e874e270ec480515edbc1cadb976cf2 (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-18726 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-23463)Record last updated .