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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2025-22048

LoongArch: BPF: Don't override subprog's return value

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: LoongArch: BPF: Don't override subprog's return value The verifier test `calls: div by 0 in subprog` triggers a panic at the ld.bu instruction. The ld.bu insn is trying to load byte from memory address returned by the subprog. The subprog actually set the correct address at the a5 register (dedicated register for BPF return values). But at commit 73c359d1d356 ("LoongArch: BPF: Sign-extend return values") we also sign extended a5 to the a0 register (return value in LoongArch). For function call insn, we later propagate the a0 register back to a5 register. This is right for native calls but wrong for bpf2bpf calls which expect zero-extended return value in a5 register. So only move a0 to a5 for native calls (i.e. non-BPF_PSEUDO_CALL).

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • 8382e92f90b601acf6d426121e6f4991502e767d to < d99845f672cce0b610f7c51248ef95d7df63927eaffected
  • 0c8d50501bc13cacecc19caaddc10db372592a39 to < 7df2696256a034405d3c5a71b3a4c54725de4404affected
  • d5d83242a1d778ceb6d8b07c6b491cf7483ca112 to < 223d565d8892481684091cfbaf3466f2b0e289d3affected
  • 73c359d1d356cf10236ccd358bd55edab33e9424 to < 780628a780b622759d9e5adc76d15432144da1a3affected
  • 73c359d1d356cf10236ccd358bd55edab33e9424 to < 996e90ab446641553e8e21707b38b9709605e0e0affected
  • 73c359d1d356cf10236ccd358bd55edab33e9424 to < 60f3caff1492e5b8616b9578c4bedb5c0a88ed14affected
  • 3b75f627b73d96787a493e2f1187543ba9c056a4affected
  • 6.1.120 to < 6.1.191affected
  • 6.6.64 to < 6.6.87affected
  • 6.12.2 to < 6.12.23affected
  • 6.11.11 to < 6.12affected

Linux Linux

Default version status: affected

  • 6.13affected
  • 0 to < 6.13unaffected
  • 6.1.191 to ≤ 6.1.*unaffected
  • 6.6.87 to ≤ 6.6.*unaffected
  • 6.12.23 to ≤ 6.12.*unaffected
  • 6.13.11 to ≤ 6.13.*unaffected
  • 6.14.2 to ≤ 6.14.*unaffected
  • 6.15 to ≤ *unaffected

References