CVE-2026-89906

7.8 HIGH

Published 2026-09-16 · Updated 2026-09-16

AI risk analysis

Summary: This vulnerability in the Linux kernel's LoongArch BPF implementation allows incorrect jump offsets, potentially leading to soft lockups. It matters because it can cause system instability without a direct attack vector.
Exploitability: Exploitation requires specific conditions, such as extra JIT passes, making it less likely but still possible. Precondition is the presence of certain code patterns that trigger the vulnerability.
Blast radius: If exploited, it could lead to system instability and potential denial of service, impacting the availability of the system.
Detection: No reliable host or network indicator is derivable from the published description.
Prioritized remediation: Upgrade to the fixed version 6.1.18 or later.

kernelbpfloongarchsoftlockupjit

Analysis generated locally by qwen2.5:7b-instruct (no data left the box). AI-assisted — verify against primary sources before acting.

NVD description

In the Linux kernel, the following vulnerability has been resolved: LoongArch: BPF: Refactor jump offset calculation in tail call The old macro-based jmp_offset calculation derives the jump distance from a stale prior-pass code stride, which can lead to wrong branch offsets and soft lockups under extra JIT passes. Fix this by calculating the offset directly on the absolute target: "ctx->offset[insn + 1] - ctx->idx". To avoid a false 16-bit range check abort during size estimation, add a "ctx->image == NULL" guard to inject a safe dummy offset.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References

Data: NVD (public domain). Analysis: local $0 model. Defensive use only.