{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98626","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-25T10:25:14.361Z","datePublished":"2026-10-18T15:19:47.832Z","dateUpdated":"2026-10-19T09:22:54.307Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-10-19T09:22:54.307Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Restrict CO-RE poisoning to relocatable instructions\n\nCO-RE relocation records can name any instruction offset. When a\nrelocation cannot be resolved, bpf_core_patch_insn() currently poisons its\ntarget before checking whether that instruction is a valid relocation\ntarget. Malformed metadata can therefore replace jumps, calls, exits,\nregister-source arithmetic, or non-immediate loads instead of failing at\nthe relocation step.\n\nHandle poisoning only after the instruction has passed the same class and\noperand-form checks used for a resolved relocation. Route invalid forms\nthrough the existing diagnostic and return a hard error. Keep poisoning\nsupported instructions, including both halves of a plain ldimm64, so an\nunresolved relocation in dead code remains valid.\n\nExtend bpf_core_poison_insn() to poison both halves of ldimm64, and return\nits status directly from each validated instruction case. This avoids\nrouting the success path through a common label and leaves the helper free\nto report errors.\n\nThe shared relocation code applies this restriction to both libbpf and\nin-kernel CO-RE."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["tools/lib/bpf/relo_core.c"],"versions":[{"version":"d7a252708dbc950ca2064310217e8b9f85846e2f","lessThan":"a8c47e62d9aea2d47a09e06c1682c59c21b92449","status":"affected","versionType":"git"},{"version":"d7a252708dbc950ca2064310217e8b9f85846e2f","lessThan":"d3219c229d16900cef936adad28633c98946e432","status":"affected","versionType":"git"},{"version":"d7a252708dbc950ca2064310217e8b9f85846e2f","lessThan":"a0b79cdfcf34b53c85bac2d3cf022fc1342eeca0","status":"affected","versionType":"git"},{"version":"d7a252708dbc950ca2064310217e8b9f85846e2f","lessThan":"f2a24101e89dd0804e717da7c1bd6af513698aa2","status":"affected","versionType":"git"},{"version":"d7a252708dbc950ca2064310217e8b9f85846e2f","lessThan":"2d7d04357c41aa49a5ac658fcc207439f2ad6456","status":"affected","versionType":"git"},{"version":"d7a252708dbc950ca2064310217e8b9f85846e2f","lessThan":"8e4cbcca1e0a2fc5e6c8edb68e0cf5f2587f9319","status":"affected","versionType":"git"},{"version":"d7a252708dbc950ca2064310217e8b9f85846e2f","lessThan":"394ae398337c5f87e567f6cd63b937fc2b2f6ddc","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["tools/lib/bpf/relo_core.c"],"versions":[{"version":"5.6","status":"affected"},{"version":"0","lessThan":"5.6","status":"unaffected","versionType":"semver"},{"version":"5.15.222","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.189","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.112","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.55","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.9","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","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":"5.6","versionEndExcluding":"5.15.222"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.1.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"6.18.55"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"7.2.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.6","versionEndExcluding":"7.3"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/a8c47e62d9aea2d47a09e06c1682c59c21b92449"},{"url":"https://git.kernel.org/stable/c/d3219c229d16900cef936adad28633c98946e432"},{"url":"https://git.kernel.org/stable/c/a0b79cdfcf34b53c85bac2d3cf022fc1342eeca0"},{"url":"https://git.kernel.org/stable/c/f2a24101e89dd0804e717da7c1bd6af513698aa2"},{"url":"https://git.kernel.org/stable/c/2d7d04357c41aa49a5ac658fcc207439f2ad6456"},{"url":"https://git.kernel.org/stable/c/8e4cbcca1e0a2fc5e6c8edb68e0cf5f2587f9319"},{"url":"https://git.kernel.org/stable/c/394ae398337c5f87e567f6cd63b937fc2b2f6ddc"}],"title":"bpf: Restrict CO-RE poisoning to relocatable instructions","x_generator":{"engine":"bippy-1.2.0"}}}}