CVE-2026-80927

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80927", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.802Z", "datePublished": "2026-09-11T19:42:03.257Z", "dateUpdated": "2026-10-19T08:45:11.147Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:45:11.147Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntimekeeping: Check the return value of tk_get_aux_ts64 in __do_adjtimex()\n\nIf the auxiliary clock is disabled during tk_get_aux_ts64() but is enabled\nbefore tks->clock_valid is checked, then uninitialized stackdata will be\nused in the calculations and indirectly leaked to userspace.\n\nThe same race window also exists after this change and also for the core\ntimekeeper. But in these cases the only effect would be incorrect\nadjustments and this is userspace's responsibility to avoid this."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/time/timekeeping.c"], "versions": [{"version": "4eca49d0b621b314ac7c80f363932ec6f6c8abc8", "lessThan": "fecf1e37775269ad38c172b468ad4ecc3968aa63", "status": "affected", "versionType": "git"}, {"version": "4eca49d0b621b314ac7c80f363932ec6f6c8abc8", "lessThan": "bc59dac50cb45a725f7a50760c7cc72a0964f722", "status": "affected", "versionType": "git"}, {"version": "4eca49d0b621b314ac7c80f363932ec6f6c8abc8", "lessThan": "4b61084b11bcecce86d03804ff30f8d7b465593c", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/time/timekeeping.c"], "versions": [{"version": "6.17", "status": "affected"}, {"version": "0", "lessThan": "6.17", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.17", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/fecf1e37775269ad38c172b468ad4ecc3968aa63"}, {"url": "https://git.kernel.org/stable/c/bc59dac50cb45a725f7a50760c7cc72a0964f722"}, {"url": "https://git.kernel.org/stable/c/4b61084b11bcecce86d03804ff30f8d7b465593c"}], "title": "timekeeping: Check the return value of tk_get_aux_ts64 in __do_adjtimex()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["kernel/time/timekeeping.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "fecf1e37775269ad38c172b468ad4ecc3968aa63", "status": "affected", "version": "4eca49d0b621b314ac7c80f363932ec6f6c8abc8", "versionType": "git"}, {"lessThan": "bc59dac50cb45a725f7a50760c7cc72a0964f722", "status": "affected", "version": "4eca49d0b621b314ac7c80f363932ec6f6c8abc8", "versionType": "git"}, {"lessThan": "4b61084b11bcecce86d03804ff30f8d7b465593c", "status": "affected", "version": "4eca49d0b621b314ac7c80f363932ec6f6c8abc8", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["kernel/time/timekeeping.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.17"}, {"lessThan": "6.17", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntimekeeping: Check the return value of tk_get_aux_ts64 in __do_adjtimex()\n\nIf the auxiliary clock is disabled during tk_get_aux_ts64() but is enabled\nbefore tks->clock_valid is checked, then uninitialized stackdata will be\nused in the calculations and indirectly leaked to userspace.\n\nThe same race window also exists after this change and also for the core\ntimekeeper. But in these cases the only effect would be incorrect\nadjustments and this is userspace's responsibility to avoid this."}], "id": "CVE-2026-80927", "lastModified": "2026-10-19T09:17:23.680", "metrics": {}, "published": "2026-09-11T20:18:56.397", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4b61084b11bcecce86d03804ff30f8d7b465593c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bc59dac50cb45a725f7a50760c7cc72a0964f722"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fecf1e37775269ad38c172b468ad4ecc3968aa63"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: Information disclosure in timekeeping due to race condition", "id": "2532325", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532325"}, "csaw": false, "cvss3": {"cvss3_base_score": "2.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-367", "details": ["A flaw was found in the Linux kernel. A race condition in the timekeeping subsystem, specifically within the __do_adjtimex() function, can occur when the auxiliary clock is handled. This allows uninitialized stack data to be used in calculations and subsequently leaked to userspace, leading to information disclosure."], "name": "CVE-2026-80927", "public_date": "2026-09-11T19:42:03Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-80927\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-80927\nhttps://git.kernel.org/stable/c/4b61084b11bcecce86d03804ff30f8d7b465593c\nhttps://git.kernel.org/stable/c/bc59dac50cb45a725f7a50760c7cc72a0964f722\nhttps://git.kernel.org/stable/c/fecf1e37775269ad38c172b468ad4ecc3968aa63"], "threat_severity": "Low"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4eca49d0b621b314ac7c80f363932ec6f6c8abc8,fecf1e37775269ad38c172b468ad4ecc3968aa63)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4eca49d0b621b314ac7c80f363932ec6f6c8abc8,bc59dac50cb45a725f7a50760c7cc72a0964f722)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4eca49d0b621b314ac7c80f363932ec6f6c8abc8,4b61084b11bcecce86d03804ff30f8d7b465593c)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.17"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.17)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,7.0.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-12T02:00:07.483739+00:00", "updated": "2026-09-21T03:30:08.703621+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}