{"cve":"CVE-2026-23463","nvd":{"published":"2026-04-03T16:16:33.520","modified":"2026-10-15T02:18:59.173","status":"Modified","description":"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's a race condition between\nfq_table[fq->idx] state and freeing/allocating from the pool and\nWARN_ON(fq_table[fq->idx]) 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->fqid = fqid;\n                                           fq->idx = fqid * 2;\n                                           WARN_ON(fq_table[fq->idx]);\n                                           fq_table[fq->idx] = fq;\n     fq_table[fq->idx] = NULL;\n\nAnd adding some logs between qman_release_fqid() and\nfq_table[fq->idx] = NULL makes the WARN_ON() trigger a lot more.\n\nTo prevent that, ensure that fq_table[fq->idx] is set to NULL before\ngen_pool_free() is called by using smp_wmb().","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H","score":4.7},"cwes":["CWE-362"],"references":["https://git.kernel.org/stable/c/014077044e874e270ec480515edbc1cadb976cf2","https://git.kernel.org/stable/c/265e56714635c5dd1e5964bfd97fa6e73f62cde5","https://git.kernel.org/stable/c/66442cf9989bd4489fa80d9f37637d58ab016835","https://git.kernel.org/stable/c/751f60bd48edaf03f9d84ab09e5ce6705757d50f","https://git.kernel.org/stable/c/85dbbf7dc88b0a54f2e334daedf6f3f31fd004fa"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T22:28:59.047572785+00:00"},"epss":{"cve":"CVE-2026-23463","score":0.00094,"percentile":0.00577,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}