{"id":"CVE-2026-98085","title":"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} instruction…","summary":"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} instruction…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= ee861486e377edc55361c08dcbceab3f6b6577bd < 671b7b9a660ef15b25faa3df161205b9dc8d1eb2","Linux >= ee861486e377edc55361c08dcbceab3f6b6577bd < 387b1baefbb776e3f48dc2261e77a49213f470f7","Linux 928d354ae3557e8f755a227e67be88034eb3cd7f","Linux 8a800497d9f6c2ec9c2c1ba7b71d0ac2ea7f7bbe","Linux de1055e7f9e67af32b1f3376066272b04e5223c0","Linux 37ad2bb11e9de92cb7b94548705eeedd87f7d392","Linux 8674e2db06cff6b50f2216eed9a761d15425bb34","Linux ce01a4e5cfac7adbe0be565f90cd32ecbb2f8337","Linux d846d83bdacbd8f14fc45c63b8c1d22608452e1c","Linux >= 5.10.265 < 5.11","Linux >= 5.15.216 < 5.16","Linux >= 6.1.183 < 6.2","Linux >= 6.6.148 < 6.7","Linux >= 6.12.101 < 6.13","Linux >= 6.18.42 < 6.19","Linux >= 7.0.10 < 7.1","Linux 7.1"],"published":"2026-09-25","updated":"2026-09-25","sourceUpdated":"2026-09-25T11:17:38.087","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-98085","references":[{"url":"https://git.kernel.org/stable/c/387b1baefbb776e3f48dc2261e77a49213f470f7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/671b7b9a660ef15b25faa3df161205b9dc8d1eb2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-25T11:06:38.834Z","slug":"CVE-2026-98085","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}