CVE-2026-99058

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-99058", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.388Z", "datePublished": "2026-10-23T12:22:45.920Z", "dateUpdated": "2026-10-30T12:41:24.511Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-30T12:41:24.511Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nworkqueue: Fix NULL current_pwq deref in chained work check\n\ncurrent_wq_worker() only tells us that %current is a kworker. It does\nnot guarantee that the worker is currently executing a work item, as\nworker->current_pwq is populated only while process_one_work() is running\nthe work function.\n\nis_chained_work() can be reached while queueing on a draining or\ndestroying workqueue. If a kworker outside work-item execution reaches\nthat path, current_wq_worker() returns a worker but worker->current_pwq is\nNULL, and the chained-work test can fault before it emits the intended\nwarning.\n\nGuard the chained-work test with worker->current_pwq. A kworker without\ncurrent_pwq is not executing work on the target workqueue, so the helper\nshould return false and let the draining/destroying warning fire."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/workqueue.c"], "versions": [{"version": "8d03ecfe471802d6afe97da97722b6924533aa82", "lessThan": "73bec442f913855907b63225306dd162c18e5c71", "status": "affected", "versionType": "git"}, {"version": "8d03ecfe471802d6afe97da97722b6924533aa82", "lessThan": "6877de2c75f0dd342099a1357856e6c8d474abc3", "status": "affected", "versionType": "git"}, {"version": "8d03ecfe471802d6afe97da97722b6924533aa82", "lessThan": "54361e4924c2c52a501b74ef10217c32f45fccfa", "status": "affected", "versionType": "git"}, {"version": "8d03ecfe471802d6afe97da97722b6924533aa82", "lessThan": "3dc61af2998cfc7312d6e59bbdcd5eed074483f2", "status": "affected", "versionType": "git"}, {"version": "8d03ecfe471802d6afe97da97722b6924533aa82", "lessThan": "729d576df89c7e4341e58c452f8890620a610ac2", "status": "affected", "versionType": "git"}, {"version": "8d03ecfe471802d6afe97da97722b6924533aa82", "lessThan": "b12a25fb2b9d5dac80e419d695450cc17a51fdfd", "status": "affected", "versionType": "git"}, {"version": "8d03ecfe471802d6afe97da97722b6924533aa82", "lessThan": "1a2668682e998039a027796b236319b380078a6a", "status": "affected", "versionType": "git"}, {"version": "8d03ecfe471802d6afe97da97722b6924533aa82", "lessThan": "980db94e3eeefdd8a1c46f86412c33a7f7806f51", "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/workqueue.c"], "versions": [{"version": "3.9", "status": "affected"}, {"version": "0", "lessThan": "3.9", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.273", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.224", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.191", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.160", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.113", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.57", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.11", "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": "3.9", "versionEndExcluding": "5.10.273"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "5.15.224"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "6.1.191"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "6.6.160"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "6.12.113"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "6.18.57"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "7.2.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/73bec442f913855907b63225306dd162c18e5c71"}, {"url": "https://git.kernel.org/stable/c/6877de2c75f0dd342099a1357856e6c8d474abc3"}, {"url": "https://git.kernel.org/stable/c/54361e4924c2c52a501b74ef10217c32f45fccfa"}, {"url": "https://git.kernel.org/stable/c/3dc61af2998cfc7312d6e59bbdcd5eed074483f2"}, {"url": "https://git.kernel.org/stable/c/729d576df89c7e4341e58c452f8890620a610ac2"}, {"url": "https://git.kernel.org/stable/c/b12a25fb2b9d5dac80e419d695450cc17a51fdfd"}, {"url": "https://git.kernel.org/stable/c/1a2668682e998039a027796b236319b380078a6a"}, {"url": "https://git.kernel.org/stable/c/980db94e3eeefdd8a1c46f86412c33a7f7806f51"}], "title": "workqueue: Fix NULL current_pwq deref in chained work check", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["kernel/workqueue.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "73bec442f913855907b63225306dd162c18e5c71", "status": "affected", "version": "8d03ecfe471802d6afe97da97722b6924533aa82", "versionType": "git"}, {"lessThan": "6877de2c75f0dd342099a1357856e6c8d474abc3", "status": "affected", "version": "8d03ecfe471802d6afe97da97722b6924533aa82", "versionType": "git"}, {"lessThan": "54361e4924c2c52a501b74ef10217c32f45fccfa", "status": "affected", "version": "8d03ecfe471802d6afe97da97722b6924533aa82", "versionType": "git"}, {"lessThan": "3dc61af2998cfc7312d6e59bbdcd5eed074483f2", "status": "affected", "version": "8d03ecfe471802d6afe97da97722b6924533aa82", "versionType": "git"}, {"lessThan": "729d576df89c7e4341e58c452f8890620a610ac2", "status": "affected", "version": "8d03ecfe471802d6afe97da97722b6924533aa82", "versionType": "git"}, {"lessThan": "b12a25fb2b9d5dac80e419d695450cc17a51fdfd", "status": "affected", "version": "8d03ecfe471802d6afe97da97722b6924533aa82", "versionType": "git"}, {"lessThan": "1a2668682e998039a027796b236319b380078a6a", "status": "affected", "version": "8d03ecfe471802d6afe97da97722b6924533aa82", "versionType": "git"}, {"lessThan": "980db94e3eeefdd8a1c46f86412c33a7f7806f51", "status": "affected", "version": "8d03ecfe471802d6afe97da97722b6924533aa82", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["kernel/workqueue.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.9"}, {"lessThan": "3.9", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.273", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.224", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.191", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.113", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.57", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.11", "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\nworkqueue: Fix NULL current_pwq deref in chained work check\n\ncurrent_wq_worker() only tells us that %current is a kworker. It does\nnot guarantee that the worker is currently executing a work item, as\nworker->current_pwq is populated only while process_one_work() is running\nthe work function.\n\nis_chained_work() can be reached while queueing on a draining or\ndestroying workqueue. If a kworker outside work-item execution reaches\nthat path, current_wq_worker() returns a worker but worker->current_pwq is\nNULL, and the chained-work test can fault before it emits the intended\nwarning.\n\nGuard the chained-work test with worker->current_pwq. A kworker without\ncurrent_pwq is not executing work on the target workqueue, so the helper\nshould return false and let the draining/destroying warning fire."}], "id": "CVE-2026-99058", "lastModified": "2026-10-30T13:21:42.603", "metrics": {}, "published": "2026-10-23T13:17:29.503", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1a2668682e998039a027796b236319b380078a6a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3dc61af2998cfc7312d6e59bbdcd5eed074483f2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/54361e4924c2c52a501b74ef10217c32f45fccfa"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6877de2c75f0dd342099a1357856e6c8d474abc3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/729d576df89c7e4341e58c452f8890620a610ac2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/73bec442f913855907b63225306dd162c18e5c71"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/980db94e3eeefdd8a1c46f86412c33a7f7806f51"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b12a25fb2b9d5dac80e419d695450cc17a51fdfd"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: workqueue: Fix NULL current_pwq deref in chained work check", "id": "2559760", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2559760"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.7", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nworkqueue: Fix NULL current_pwq deref in chained work check\ncurrent_wq_worker() only tells us that %current is a kworker. It does\nnot guarantee that the worker is currently executing a work item, as\nworker->current_pwq is populated only while process_one_work() is running\nthe work function.\nis_chained_work() can be reached while queueing on a draining or\ndestroying workqueue. If a kworker outside work-item execution reaches\nthat path, current_wq_worker() returns a worker but worker->current_pwq is\nNULL, and the chained-work test can fault before it emits the intended\nwarning.\nGuard the chained-work test with worker->current_pwq. A kworker without\ncurrent_pwq is not executing work on the target workqueue, so the helper\nshould return false and let the draining/destroying warning fire.", "A flaw was found in the Linux kernel's workqueue subsystem. A local user can cause a Denial of Service (DoS) through a system crash by queueing work onto a workqueue that is being drained or destroyed. This issue occurs because the kernel fails to verify that a worker thread is actively executing work before evaluating chained tasks, resulting in a NULL pointer dereference."], "name": "CVE-2026-99058", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-10-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-99058\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-99058\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-99058.mbox"], "threat_severity": "Moderate"}

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