CVE-2026-98085
In the Linux kernel, the following vulnerability has been resolved: bpf: backtrack_insn(): Handle ld_{abs,ind} subprog exit edge Nicholas Carlini reported a bug in precision backtracking mechanism for BPF_LD | BPF_{IND,ABS} instructions. These instructions are modelled as two branches: - fallthrough; - implicit exit from current subprogram. The implicit exit case was not handled by the backtrack_insn() function. When backtracking such a path backtrack_insn() did not call bt_subprog_enter(), which meant that backtracking continued manipulating precision marks in a caller frame, while looking at instructions in a callee frame. This lead to segmentation faults during verification (see the selftest), or unsound state pruning.
Affected versions
Linux kernel versions
5.10.265,
5.15.216,
6.1.183,
6.6.148,
6.12.101,
6.18.42,
7.0.10,
7.1
and later are affected. Fixed in
7.2.7,
7.3-rc2
and their respective stable series.
References
2 totalFrequently asked questions
-
What is CVE-2026-98085?
CVE-2026-98085 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.10.265 onward and has been patched in 7.2.7 and 7.3-rc2. CVE-2026-98085 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
-
Is there a patch available for CVE-2026-98085?
Yes. CVE-2026-98085 has been patched. Fixed versions include 7.2.7 and 7.3-rc2. If you are running Linux kernel 5.10.265 or later up to the fix versions, apply the relevant patch for your kernel branch.
-
Is CVE-2026-98085 actively exploited?
No. CVE-2026-98085 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.