CVE-2026-98572

Unknown

Last modified

CVE-2026-98572 is a vulnerability of currently unknown severity. 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.

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 Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= eb63cfcd2ee8ec3805f6881f43341f589c3d2278, < 1547e9f3a7d71971216e6dba30270cae13fe4e02; >= eb63cfcd2ee8ec3805f6881f43341f589c3d2278, < beeae92e70e705e90a0d6d9b3b8498ee3b92f495; >= eb63cfcd2ee8ec3805f6881f43341f589c3d2278, < 6f939529ed6c580e9b6c5daa20be67fa0b3d4cf0; >= eb63cfcd2ee8ec3805f6881f43341f589c3d2278, < 876ef04c75c2751acfd355606fca3eced71dec65; >= eb63cfcd2ee8ec3805f6881f43341f589c3d2278, < 1bd91670966a7142ac94f2cebe2b5ae6bf5cb0c8; >= eb63cfcd2ee8ec3805f6881f43341f589c3d2278, < db762fd96be225bd06161c9631160c755d891693
LinuxLinux5.16

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-98572?
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.
How severe is CVE-2026-98572?
Severity scoring for CVE-2026-98572 is pending analysis.
How do I fix CVE-2026-98572?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST