{"id":"CVE-2026-92520","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Zero queue and stack outputs on lock failure\n\nQueue and stack pop/peek helpers accept an uninitialized output buffer\nbecause the verifier expects the helper to ini…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Zero queue and stack outputs on lock failure\n\nQueue and stack pop/peek helpers accept an uninitialized output buffer\nbecause the verifier expects the helper to ini…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8 < 1534c4bff3aaca19c4c9a82f93e9b81f7c983de3","Linux >= a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8 < e2396b8a562073787e627a5f483f1bc5c452fa6a","Linux >= a34a9f1a19afe9c60ca0ea61dfeee63a1c2baac8 < 7ac6e1ae41a09f1dd4baeeff1d028ae49ee01232","Linux 40e34ea01748e5b8afdd40a172868be1e1ab0ede","Linux 388c9d3eefaea99828ee5000c693128a5b41ee7c","Linux acabf5df49aa3a4f9c96200102d893351b511a88","Linux e388671635acf470f0986d874389148fd234620b","Linux 232f0ba4d69263af5912e279fcc32fef2882b1dc","Linux >= 5.4.258 < 5.5","Linux >= 5.10.198 < 5.11","Linux >= 5.15.134 < 5.16","Linux >= 6.1.56 < 6.2","Linux >= 6.5.6 < 6.6","Linux 6.6"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:54.900","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-92520","references":[{"url":"https://git.kernel.org/stable/c/1534c4bff3aaca19c4c9a82f93e9b81f7c983de3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7ac6e1ae41a09f1dd4baeeff1d028ae49ee01232","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/e2396b8a562073787e627a5f483f1bc5c452fa6a","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92520.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-92520"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536422"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-92520"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-92520"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-92520.mbox"},{"url":"https://git.kernel.org/stable/c/a6090eeb289c5fa45f7b629befac2bd3c19a6dae"},{"url":"https://git.kernel.org/stable/c/23b4bcc79bab5285275912b94e98c286f281de75"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-09-17T16:21:47.776Z","epss":0.00209,"epssPercentile":0.1093,"cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-908"],"slug":"CVE-2026-92520","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Zero queue and stack outputs on lock failure\n\nQueue and stack pop/peek helpers accept an uninitialized output buffer\nbecause the verifier expects the helper to initialize it. The empty-map\nerror path clears the buffer, but a failed lock acquisition returns\n-EBUSY without writing it.\n\nClear the output before returning -EBUSY so BPF programs cannot observe\nuninitialized stack contents after a failed helper call.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-92520.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":225521,"id":"CVE-2026-92520","ts":1792498281905,"field":"cvss","old":null,"new":"5.5"},{"seq":225520,"id":"CVE-2026-92520","ts":1792498281905,"field":"severity","old":"none","new":"medium"}]}