Bug 2554973 (CVE-2026-98572) - CVE-2026-98572 kernel: bpf: Fix immediate JMP JEQ/JNE on MIPS32
Summary: CVE-2026-98572 kernel: bpf: Fix immediate JMP JEQ/JNE on MIPS32
Keywords:
Status: NEW
Alias: CVE-2026-98572
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-18 15:36 UTC by OSIDB Bzimport
Modified: 2026-10-20 03:10 UTC (History)
17 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-10-18 15:36:44 UTC 
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.
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