CVE-2026-89906 in Linux
Zusammenfassung
von MITRE • 16.09.2026
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.
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