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

Vulnerability from cvelistv5 – Published: 2026-04-03 15:15 – Updated: 2026-07-14 12:47
VLAI
Title
soc: fsl: qbman: fix race condition in qman_destroy_fq
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().
Severity
4.7 (Medium)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted 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)
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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)
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Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
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Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
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Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.6 , < * (custom)
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Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP Affected: V3.1.5 , < * (custom)
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    "dateUpdated": "2026-07-14T12:47:17.915Z",
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      "date": "2026-07-25",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-23463\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-04-03T16:16:33.520\",\"lastModified\":\"2026-07-24T22:10:00.140\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"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().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad:\\n\\nsoc: fsl: qbman: corregir condici\u00f3n de carrera en qman_destroy_fq\\n\\nCuando QMAN_FQ_FLAG_DYNAMIC_FQID est\u00e1 configurado, existe una condici\u00f3n de carrera entre el estado de fq_table[fq -\u003e idx] y la liberaci\u00f3n/asignaci\u00f3n del pool, y WARN_ON(fq_table[fq -\u003e idx]) en qman_create_fq() se activa.\\n\\nDe hecho, podemos tener:\\n         Hilo A                               Hilo B\\n    qman_destroy_fq()                    qman_create_fq()\\n      qman_release_fqid()\\n        qman_shutdown_fq()\\n        gen_pool_free()\\n           -- En este punto, el fqid est\u00e1 disponible de nuevo --\\n                                           qman_alloc_fqid()\\n           -- as\u00ed, podemos obtener el fqid reci\u00e9n liberado en el hilo B --\\n                                           fq -\u003e fqid = fqid;\\n                                           fq -\u003e idx = fqid * 2;\\n                                           WARN_ON(fq_table[fq -\u003e idx]);\\n                                           fq_table[fq -\u003e idx] = fq;\\n     fq_table[fq -\u003e idx] = NULL;\\n\\nY a\u00f1adir algunos registros entre qman_release_fqid() y fq_table[fq -\u003e idx] = NULL hace que el WARN_ON() se active mucho m\u00e1s.\\n\\nPara evitar eso, aseg\u00farese de que fq_table[fq -\u003e idx] se establezca a NULL antes de que se llame a gen_pool_free() usando smp_wmb().\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/soc/fsl/qbman/qman.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"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\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/soc/fsl/qbman/qman.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.9\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.9\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.253\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.203\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.167\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.130\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.78\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.20\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19.10\",\"lessThanOrEqual\":\"6.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]},{\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\",\"affectedData\":[{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.5\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.5\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.5\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.5\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.6\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]},{\"vendor\":\"Siemens\",\"product\":\"SIPLUS S7-1500 CPU 1518-4 PN/DP MFP\",\"defaultStatus\":\"unknown\",\"versions\":[{\"version\":\"V3.1.5\",\"lessThan\":\"*\",\"versionType\":\"custom\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":4.7,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.0,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-362\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.9\",\"versionEndExcluding\":\"5.10.253\",\"matchCriteriaId\":\"E1222648-5D33-4FD3-BE03-3A3C9BDEAD8A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.203\",\"matchCriteriaId\":\"20DDB3E9-AABF-4107-ADB0-5362AA067045\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.167\",\"matchCriteriaId\":\"2EDC6BAF-B710-4E26-B6AA-D68922EE7B43\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.2\",\"versionEndExcluding\":\"6.6.130\",\"matchCriteriaId\":\"C57BB918-DF28-46B3-94F7-144176841267\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.7\",\"versionEndExcluding\":\"6.12.78\",\"matchCriteriaId\":\"28D591F5-B196-4CC9-905C-DC80F116E7A8\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.20\",\"matchCriteriaId\":\"E5571059-6552-48E7-9BEF-3E358C387171\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.19\",\"versionEndExcluding\":\"6.19.10\",\"matchCriteriaId\":\"96D34333-38BE-4414-9E79-6EB764329581\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"F253B622-8837-4245-BCE5-A7BF8FC76A16\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F666C8D8-6538-46D4-B318-87610DE64C34\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"02259FDA-961B-47BC-AE7F-93D7EC6E90C2\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/014077044e874e270ec480515edbc1cadb976cf2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/265e56714635c5dd1e5964bfd97fa6e73f62cde5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/66442cf9989bd4489fa80d9f37637d58ab016835\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/751f60bd48edaf03f9d84ab09e5ce6705757d50f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/85dbbf7dc88b0a54f2e334daedf6f3f31fd004fa\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9e3d47904b8153c8c3ad2f9b66d5008aad677aa8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d21923a8059fa896bfef016f55dd769299335cb4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d288fbe652ef43b7128e4bc0c0c2ef6bd03a2210\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://cert-portal.siemens.com/productcert/html/ssa-019113.html\",\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\"},{\"url\":\"https://cert-portal.siemens.com/productcert/html/ssa-082556.html\",\"source\":\"0b142b55-0307-4c5a-b3c9-f314f3fb7c5e\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-28T11:29:20+00:00",
      "cve": "CVE-2026-23463",
      "id": "CVE-2026-23463",
      "initial_release_date": "2026-04-03T00:00:00+00:00",
      "product_status:known_affected": "76",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: soc: fsl: qbman: fix race condition in qman_destroy_fq",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23463.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-15T05:28:02Z",
      "cve": "CVE-2026-23463",
      "id": "CVE-2026-23463",
      "initial_release_date": "2026-04-03T23:27:13Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "225",
      "product_status:known_not_affected": "13",
      "product_status:recommended": "268",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-23463",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-23463.json",
      "version": "12"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.