What’s Vulnerable › Vulnerabilities

CVE-2026-98572: bpf: Fix immediate JMP JEQ/JNE on MIPS32

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-18 · updated 2026-10-19

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.

Affected products

• Linux kernel: 5.16 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

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

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