CVEvulnerability
CVE-2026-98572
- Status
- Received
- Published
- 2026-10-18
- Last modified
- 2026-10-19
- Assigner
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Description
In the Linux kernel, the following vulnerability has been resolved:
bpf: Fix immediate JMP JEQ/JNE on MIPS32
An addu instruction was emitted instead of addiu, causing the immediate
value 1 to be interpreted as register $at. This made the comparison
result invalid when the immediate operand was negative. Note that $at
is mapped to BPF_REG_AX, which is used for constant blinding.
Fix the instruction to use the immediate form.
Found with test_bpf on MIPS32r1 emulated by QEMU.
References
- https://git.kernel.org/stable/c/1547e9f3a7d71971216e6dba30270cae13fe4e02 git.kernel.org
- https://git.kernel.org/stable/c/1bd91670966a7142ac94f2cebe2b5ae6bf5cb0c8 git.kernel.org
- https://git.kernel.org/stable/c/6f939529ed6c580e9b6c5daa20be67fa0b3d4cf0 git.kernel.org
- https://git.kernel.org/stable/c/876ef04c75c2751acfd355606fca3eced71dec65 git.kernel.org
- https://git.kernel.org/stable/c/beeae92e70e705e90a0d6d9b3b8498ee3b92f495 git.kernel.org
- https://git.kernel.org/stable/c/db762fd96be225bd06161c9631160c755d891693 git.kernel.org