{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98085","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-25T10:19:56.075Z","datePublished":"2026-09-25T10:24:20.485Z","dateUpdated":"2026-09-25T10:24:20.485Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-25T10:24:20.485Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: backtrack_insn(): Handle ld_{abs,ind} subprog exit edge\n\nNicholas Carlini reported a bug in precision backtracking mechanism\nfor BPF_LD | BPF_{IND,ABS} instructions. These instructions are\nmodelled as two branches:\n- fallthrough;\n- implicit exit from current subprogram.\n\nThe implicit exit case was not handled by the backtrack_insn()\nfunction. When backtracking such a path backtrack_insn() did not\ncall bt_subprog_enter(), which meant that backtracking continued\nmanipulating precision marks in a caller frame, while looking at\ninstructions in a callee frame.\n\nThis lead to segmentation faults during verification (see the\nselftest), or unsound state pruning."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/backtrack.c"],"versions":[{"version":"ee861486e377edc55361c08dcbceab3f6b6577bd","lessThan":"671b7b9a660ef15b25faa3df161205b9dc8d1eb2","status":"affected","versionType":"git"},{"version":"ee861486e377edc55361c08dcbceab3f6b6577bd","lessThan":"387b1baefbb776e3f48dc2261e77a49213f470f7","status":"affected","versionType":"git"},{"version":"928d354ae3557e8f755a227e67be88034eb3cd7f","status":"affected","versionType":"git"},{"version":"8a800497d9f6c2ec9c2c1ba7b71d0ac2ea7f7bbe","status":"affected","versionType":"git"},{"version":"de1055e7f9e67af32b1f3376066272b04e5223c0","status":"affected","versionType":"git"},{"version":"37ad2bb11e9de92cb7b94548705eeedd87f7d392","status":"affected","versionType":"git"},{"version":"8674e2db06cff6b50f2216eed9a761d15425bb34","status":"affected","versionType":"git"},{"version":"ce01a4e5cfac7adbe0be565f90cd32ecbb2f8337","status":"affected","versionType":"git"},{"version":"d846d83bdacbd8f14fc45c63b8c1d22608452e1c","status":"affected","versionType":"git"},{"version":"5.10.265","lessThan":"5.11","status":"affected","versionType":"semver"},{"version":"5.15.216","lessThan":"5.16","status":"affected","versionType":"semver"},{"version":"6.1.183","lessThan":"6.2","status":"affected","versionType":"semver"},{"version":"6.6.148","lessThan":"6.7","status":"affected","versionType":"semver"},{"version":"6.12.101","lessThan":"6.13","status":"affected","versionType":"semver"},{"version":"6.18.42","lessThan":"6.19","status":"affected","versionType":"semver"},{"version":"7.0.10","lessThan":"7.1","status":"affected","versionType":"semver"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/backtrack.c"],"versions":[{"version":"7.1","status":"affected"},{"version":"0","lessThan":"7.1","status":"unaffected","versionType":"semver"},{"version":"7.2.7","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc2","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":"7.1","versionEndExcluding":"7.2.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.1","versionEndExcluding":"7.3-rc2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.265"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.216"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.148"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12.101"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.0.10"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/671b7b9a660ef15b25faa3df161205b9dc8d1eb2"},{"url":"https://git.kernel.org/stable/c/387b1baefbb776e3f48dc2261e77a49213f470f7"}],"title":"bpf: backtrack_insn(): Handle ld_{abs,ind} subprog exit edge","x_generator":{"engine":"bippy-1.2.0"}}}}