{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53166", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.389Z", "datePublished": "2026-06-25T08:38:46.089Z", "dateUpdated": "2026-06-25T08:38:46.089Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-25T08:38:46.089Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfutex/requeue: Prevent NULL pointer dereference in remove_waiter() on self-deadlock\n\nWhen FUTEX_CMP_REQUEUE_PI requeues a non-top waiter that already owns the\ntarget PI futex, task_blocks_on_rt_mutex() returns -EDEADLK before setting\nwaiter->task.\n\nThe subsequent remove_waiter() in rt_mutex_start_proxy_lock() dereferences\nthe NULL waiter->task, causing a kernel crash.\n\nAdd a self-deadlock check for non-top waiters before calling\nrt_mutex_start_proxy_lock(), analogous to the top-waiter check in\nfutex_lock_pi_atomic()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/futex/requeue.c"], "versions": [{"version": "3fb7394a837740770f0d6b4b30567e60786a63f2", "lessThan": "16f8e17184b31382076f84751db5ac51fc02733e", "status": "affected", "versionType": "git"}, {"version": "88614876370aac8ad1050ad785a4c095ba17ac11", "lessThan": "1f2f3f3eacd6653ab215c5d2ea70811148d433fc", "status": "affected", "versionType": "git"}, {"version": "3bfdc63936dd4773109b7b8c280c0f3b5ae7d349", "lessThan": "74e144274af39935b0f410c0ee4d2b91c3730414", "status": "affected", "versionType": "git"}, {"version": "d8cce4773c2b23d819baf5abedc62f7b430e8745", "status": "affected", "versionType": "git"}, {"version": "8a1fc8d698ac5e5916e3082a0f74450d71f9611f", "status": "affected", "versionType": "git"}, {"version": "6d52dfcb2a5db86e346cf51f8fcf2071b8085166", "status": "affected", "versionType": "git"}, {"version": "6.1.175", "lessThan": "6.2", "status": "affected", "versionType": "semver"}, {"version": "6.6.140", "lessThan": "6.7", "status": "affected", "versionType": "semver"}, {"version": "6.12.86", "lessThan": "6.13", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/futex/requeue.c"], "versions": [{"version": "6.18.27", "lessThan": "6.18.36", "status": "affected", "versionType": "semver"}, {"version": "7.0.4", "lessThan": "7.0.13", "status": "affected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18.27", "versionEndExcluding": "6.18.36"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.0.4", "versionEndExcluding": "7.0.13"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.140"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.86"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/16f8e17184b31382076f84751db5ac51fc02733e"}, {"url": "https://git.kernel.org/stable/c/1f2f3f3eacd6653ab215c5d2ea70811148d433fc"}, {"url": "https://git.kernel.org/stable/c/74e144274af39935b0f410c0ee4d2b91c3730414"}], "title": "futex/requeue: Prevent NULL pointer dereference in remove_waiter() on self-deadlock", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{}

{"bugzilla": {"description": "kernel: futex/requeue: Prevent NULL pointer dereference in remove_waiter() on self-deadlock", "id": "2492805", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492805"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["A flaw was found in the Linux kernel's futex (Fast Userspace Mutex) requeue mechanism. When a non-top waiter attempts to requeue a Priority Inheritance (PI) futex it already owns, a NULL pointer dereference can occur. This issue, specifically within the `remove_waiter()` function during a self-deadlock scenario, leads to a kernel crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-53166", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "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"}], "public_date": "2026-06-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53166\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53166\nhttps://lore.kernel.org/linux-cve-announce/2026062551-CVE-2026-53166-2861@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3fb7394a837740770f0d6b4b30567e60786a63f2,16f8e17184b31382076f84751db5ac51fc02733e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[88614876370aac8ad1050ad785a4c095ba17ac11,1f2f3f3eacd6653ab215c5d2ea70811148d433fc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3bfdc63936dd4773109b7b8c280c0f3b5ae7d349,74e144274af39935b0f410c0ee4d2b91c3730414)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "d8cce4773c2b23d819baf5abedc62f7b430e8745"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "8a1fc8d698ac5e5916e3082a0f74450d71f9611f"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "6d52dfcb2a5db86e346cf51f8fcf2071b8085166"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.1.175,6.2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.6.140,6.7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.12.86,6.13)"}}], "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": "semver", "value": "[6.18.27,6.18.36)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[7.0.4,7.0.13)"}}], "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": "2026-06-25T11:45:03.802761+00:00", "updated": "2026-06-26T14:00:22.316652+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}