{"id":"CVE-2026-90300","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Clear buf on error in __bpf_get_task_stack\n\nBoth bpf_get_task_stack and bpf_get_task_stack_sleepable helpers that\nuse __bpf_get_task_stack have buf defined as ARG_…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Clear buf on error in __bpf_get_task_stack\n\nBoth bpf_get_task_stack and bpf_get_task_stack_sleepable helpers that\nuse __bpf_get_task_stack have buf defined as ARG_…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= 06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df < f523359c4789bb0396d2d642464a6e2fd4f2299d","Linux >= 06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df < f5d242825ca417bb6afe35fde6e8880f97ca43fb","Linux d921baabd96445ef9c9c9410ca06164359c8a1a5","Linux 9c020a533eaae1c2d41a7e3835c4c818a9b4b656","Linux ff6bdc205fd0a83bd365405d4e31fb5905826996","Linux >= 5.10.30 < 5.11","Linux >= 5.11.14 < 5.12","Linux >= 5.10.96 < 5.11","Linux 5.12"],"published":"2026-09-17","updated":"2026-10-15","sourceUpdated":"2026-10-15T11:18:00.413","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90300","references":[{"url":"https://git.kernel.org/stable/c/1f0f61573ba4cb899105b5cef65be3ca02205f93","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f523359c4789bb0396d2d642464a6e2fd4f2299d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f5d242825ca417bb6afe35fde6e8880f97ca43fb","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90300.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-90300"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536306"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90300"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90300"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90300.mbox"},{"url":"https://git.kernel.org/stable/c/4acc761b4e3feca1eb648d21fc4d665b23c5372d"},{"url":"https://git.kernel.org/stable/c/6f5a7bcc049709af12e403111d5e73e80910dafc"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00209,"epssPercentile":0.10954,"ingestedAt":"2026-09-17T16:21:47.829Z","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-2026-90300","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Clear buf on error in __bpf_get_task_stack\n\nBoth bpf_get_task_stack and bpf_get_task_stack_sleepable helpers that\nuse __bpf_get_task_stack have buf defined as ARG_PTR_TO_UNINIT_MEM\nargument and we should initialize the buf on every return path.\n\nAdding missing buf memset for __bpf_get_task_stack fail paths. This\nprovides deterministic buffer contents, which is useful when the buffer\nis used directly as a map key.\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 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90300.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":224322,"id":"CVE-2026-90300","ts":1792325087112,"field":"cvss","old":null,"new":"5.5"},{"seq":224321,"id":"CVE-2026-90300","ts":1792325087112,"field":"severity","old":"none","new":"medium"}]}