{"id":"CVE-2026-90300","state":"PUBLISHED","title":"bpf: Clear buf on error in __bpf_get_task_stack","description":"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_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.","publishedAt":"2026-09-17T16:08:24.515Z","updatedAt":"2026-10-30T12:35:04.681Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df","status":"affected","lessThan":"5c4c57a277a87ed235183d03b671d346f5101f62","versionType":"git"},{"version":"06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df","status":"affected","lessThan":"4acc761b4e3feca1eb648d21fc4d665b23c5372d","versionType":"git"},{"version":"06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df","status":"affected","lessThan":"6f5a7bcc049709af12e403111d5e73e80910dafc","versionType":"git"},{"version":"06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df","status":"affected","lessThan":"1f0f61573ba4cb899105b5cef65be3ca02205f93","versionType":"git"},{"version":"06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df","status":"affected","lessThan":"f523359c4789bb0396d2d642464a6e2fd4f2299d","versionType":"git"},{"version":"06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df","status":"affected","lessThan":"f5d242825ca417bb6afe35fde6e8880f97ca43fb","versionType":"git"},{"version":"d921baabd96445ef9c9c9410ca06164359c8a1a5","status":"affected","versionType":"git"},{"version":"9c020a533eaae1c2d41a7e3835c4c818a9b4b656","status":"affected","versionType":"git"},{"version":"ff6bdc205fd0a83bd365405d4e31fb5905826996","status":"affected","versionType":"git"},{"version":"5.10.30","status":"affected","lessThan":"5.11","versionType":"semver"},{"version":"5.11.14","status":"affected","lessThan":"5.12","versionType":"semver"},{"version":"5.10.96","status":"affected","lessThan":"5.11","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/stackmap.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.12","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/stackmap.c"]}],"references":["https://git.kernel.org/stable/c/5c4c57a277a87ed235183d03b671d346f5101f62","https://git.kernel.org/stable/c/4acc761b4e3feca1eb648d21fc4d665b23c5372d","https://git.kernel.org/stable/c/6f5a7bcc049709af12e403111d5e73e80910dafc","https://git.kernel.org/stable/c/1f0f61573ba4cb899105b5cef65be3ca02205f93","https://git.kernel.org/stable/c/f523359c4789bb0396d2d642464a6e2fd4f2299d","https://git.kernel.org/stable/c/f5d242825ca417bb6afe35fde6e8880f97ca43fb"],"weaknesses":[],"ingestedAt":"2026-10-30T12:54:04.478Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90300.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90300","state":"PUBLISHED","datePublished":"2026-09-17T16:08:24.515Z","dateUpdated":"2026-10-30T12:35:04.681Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.799Z"},"containers":{"cna":{"title":"bpf: Clear buf on error in __bpf_get_task_stack","descriptions":[{"lang":"en","value":"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_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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df","status":"affected","lessThan":"5c4c57a277a87ed235183d03b671d346f5101f62","versionType":"git"},{"version":"06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df","status":"affected","lessThan":"4acc761b4e3feca1eb648d21fc4d665b23c5372d","versionType":"git"},{"version":"06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df","status":"affected","lessThan":"6f5a7bcc049709af12e403111d5e73e80910dafc","versionType":"git"},{"version":"06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df","status":"affected","lessThan":"1f0f61573ba4cb899105b5cef65be3ca02205f93","versionType":"git"},{"version":"06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df","status":"affected","lessThan":"f523359c4789bb0396d2d642464a6e2fd4f2299d","versionType":"git"},{"version":"06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df","status":"affected","lessThan":"f5d242825ca417bb6afe35fde6e8880f97ca43fb","versionType":"git"},{"version":"d921baabd96445ef9c9c9410ca06164359c8a1a5","status":"affected","versionType":"git"},{"version":"9c020a533eaae1c2d41a7e3835c4c818a9b4b656","status":"affected","versionType":"git"},{"version":"ff6bdc205fd0a83bd365405d4e31fb5905826996","status":"affected","versionType":"git"},{"version":"5.10.30","status":"affected","lessThan":"5.11","versionType":"semver"},{"version":"5.11.14","status":"affected","lessThan":"5.12","versionType":"semver"},{"version":"5.10.96","status":"affected","lessThan":"5.11","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/stackmap.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.12","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.160","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.114","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.57","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/stackmap.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/5c4c57a277a87ed235183d03b671d346f5101f62"},{"url":"https://git.kernel.org/stable/c/4acc761b4e3feca1eb648d21fc4d665b23c5372d"},{"url":"https://git.kernel.org/stable/c/6f5a7bcc049709af12e403111d5e73e80910dafc"},{"url":"https://git.kernel.org/stable/c/1f0f61573ba4cb899105b5cef65be3ca02205f93"},{"url":"https://git.kernel.org/stable/c/f523359c4789bb0396d2d642464a6e2fd4f2299d"},{"url":"https://git.kernel.org/stable/c/f5d242825ca417bb6afe35fde6e8880f97ca43fb"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:35:04.681Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.6.160"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.12.114"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.18.57"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"7.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.30"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.11.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.96"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}