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CVE-2026-98572

Linux: bpf: Fix immediate JMP JEQ/JNE on MIPS32

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.21%Chance of exploitation activity in the next 30 days, higher than 10% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in1547e9f3a7d71971216e6dba30270cae13fe4e02Also 6f939529ed6c580e9b6c5daa20be67fa0b3d4cf0, 876ef04c75c2751acfd355606fca3eced71dec65 and 1 moreCVE List
Published18 Oct 2026Updated 19 Oct 2026CVE List

What fixes it

  • 1547e9f3a7d71971216e6dba30270cae13fe4e02LinuxCVE List
  • 6f939529ed6c580e9b6c5daa20be67fa0b3d4cf0LinuxCVE List
  • 876ef04c75c2751acfd355606fca3eced71dec65LinuxCVE List
  • 1bd91670966a7142ac94f2cebe2b5ae6bf5cb0c8LinuxCVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 14

  • Linuxaffected: eb63cfcd2ee8ec3805f6881f43341f589c3d2278 before 1547e9f3a7d71971216e6dba30270cae13fe4e02CVE List
  • Linuxaffected: eb63cfcd2ee8ec3805f6881f43341f589c3d2278 before beeae92e70e705e90a0d6d9b3b8498ee3b92f495CVE List
  • Linuxaffected: eb63cfcd2ee8ec3805f6881f43341f589c3d2278 before 6f939529ed6c580e9b6c5daa20be67fa0b3d4cf0CVE List
  • Linuxaffected: eb63cfcd2ee8ec3805f6881f43341f589c3d2278 before 876ef04c75c2751acfd355606fca3eced71dec65CVE List
  • Linuxaffected: eb63cfcd2ee8ec3805f6881f43341f589c3d2278 before 1bd91670966a7142ac94f2cebe2b5ae6bf5cb0c8CVE List
  • Linuxaffected: eb63cfcd2ee8ec3805f6881f43341f589c3d2278 before db762fd96be225bd06161c9631160c755d891693CVE List
  • Linuxaffected: 5.16CVE List
  • Linuxunaffected: all versions before 5.16CVE List
  • Linuxunaffected: 6.1.189 through 6.1.*CVE List
  • Linuxunaffected: 6.6.158 through 6.6.*CVE List
  • Linuxunaffected: 6.12.112 through 6.12.*CVE List
  • Linuxunaffected: 6.18.55 through 6.18.*CVE List
  • Linuxunaffected: 7.2.9 through 7.2.*CVE List
  • Linuxunaffected: 7.3CVE List

References 6