Vulnerability in Linux

[ Description ]Official 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.

[ Fixes ]Fixes and patches

No fix or interim patch is linked from our sources yet. Check the vendor references below and limit exposure of affected systems until a fix is available.

[ Advisories ]Government CERT advisories

• BSI CERT-Bund18 Oct 2026WID-SEC-2026-4019

  Linux Kernel: Multiple vulnerabilities Translated from German

  CVE-2026-98866CVE-2026-98624CVE-2026-98745+326 more CVEs

[ References ]References

• git.kernel.org/stable/c/1547e9f3a7d71971216e6dba30270cae13fe4e02
• git.kernel.org/stable/c/1bd91670966a7142ac94f2cebe2b5ae6bf5cb0c8
• git.kernel.org/stable/c/6f939529ed6c580e9b6c5daa20be67fa0b3d4cf0
• git.kernel.org/stable/c/876ef04c75c2751acfd355606fca3eced71dec65
• git.kernel.org/stable/c/beeae92e70e705e90a0d6d9b3b8498ee3b92f495
• git.kernel.org/stable/c/db762fd96be225bd06161c9631160c755d891693