{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31554", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.115Z", "datePublished": "2026-04-24T14:35:38.527Z", "dateUpdated": "2026-04-24T14:35:38.527Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-04-24T14:35:38.527Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfutex: Require sys_futex_requeue() to have identical flags\n\nNicholas reported that his LLM found it was possible to create a UaF\nwhen sys_futex_requeue() is used with different flags. The initial\nmotivation for allowing different flags was the variable sized futex,\nbut since that hasn't been merged (yet), simply mandate the flags are\nidentical, as is the case for the old style sys_futex() requeue\noperations."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/futex/syscalls.c"], "versions": [{"version": "0f4b5f972216782a4acb1ae00dcb55173847c2ff", "lessThan": "027145ace09fad4c7cbcd6c61fe9b429c63eb0e5", "status": "affected", "versionType": "git"}, {"version": "0f4b5f972216782a4acb1ae00dcb55173847c2ff", "lessThan": "18b7d09c2b794c71d4252f3ea2cf84ad12b73d6a", "status": "affected", "versionType": "git"}, {"version": "0f4b5f972216782a4acb1ae00dcb55173847c2ff", "lessThan": "e2f78c7ec1655fedd945366151ba54fcb9580508", "status": "affected", "versionType": "git"}, {"version": "0f4b5f972216782a4acb1ae00dcb55173847c2ff", "lessThan": "19f94b39058681dec64a10ebeb6f23fe7fc3f77a", "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/futex/syscalls.c"], "versions": [{"version": "6.7", "status": "affected"}, {"version": "0", "lessThan": "6.7", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.80", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.21", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.11", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "6.7", "versionEndExcluding": "6.12.80"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.18.21"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "6.19.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/027145ace09fad4c7cbcd6c61fe9b429c63eb0e5"}, {"url": "https://git.kernel.org/stable/c/18b7d09c2b794c71d4252f3ea2cf84ad12b73d6a"}, {"url": "https://git.kernel.org/stable/c/e2f78c7ec1655fedd945366151ba54fcb9580508"}, {"url": "https://git.kernel.org/stable/c/19f94b39058681dec64a10ebeb6f23fe7fc3f77a"}], "title": "futex: Require sys_futex_requeue() to have identical flags", "x_generator": {"engine": "bippy-1.2.0"}}}}

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{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfutex: Require sys_futex_requeue() to have identical flags\n\nNicholas reported that his LLM found it was possible to create a UaF\nwhen sys_futex_requeue() is used with different flags. The initial\nmotivation for allowing different flags was the variable sized futex,\nbut since that hasn't been merged (yet), simply mandate the flags are\nidentical, as is the case for the old style sys_futex() requeue\noperations."}], "id": "CVE-2026-31554", "lastModified": "2026-04-24T17:51:40.810", "metrics": {}, "published": "2026-04-24T15:16:29.730", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/027145ace09fad4c7cbcd6c61fe9b429c63eb0e5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/18b7d09c2b794c71d4252f3ea2cf84ad12b73d6a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/19f94b39058681dec64a10ebeb6f23fe7fc3f77a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e2f78c7ec1655fedd945366151ba54fcb9580508"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: futex: Require sys_futex_requeue() to have identical flags", "id": "2461526", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2461526"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in the Linux kernel. A local attacker could exploit a use-after-free vulnerability by calling the `sys_futex_requeue()` function with inconsistent flags. This could lead to a system crash, resulting in a denial of service, or potentially allow for privilege escalation."], "name": "CVE-2026-31554", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31554\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31554\nhttps://lore.kernel.org/linux-cve-announce/2026042456-CVE-2026-31554-377c@gregkh/T"], "threat_severity": "Moderate"}

{}