CVE-2025-22048 (GCVE-0-2025-22048)
Vulnerability from cvelistv5
Published
2025-04-16 14:12
Modified
2025-05-26 05:17
Severity ?
Summary
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).
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/223d565d8892481684091cfbaf3466f2b0e289d3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/60f3caff1492e5b8616b9578c4bedb5c0a88ed14
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/780628a780b622759d9e5adc76d15432144da1a3
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7df2696256a034405d3c5a71b3a4c54725de4404
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/996e90ab446641553e8e21707b38b9709605e0e0
Impacted products
Vendor Product Version
Linux Linux Version: 0c8d50501bc13cacecc19caaddc10db372592a39
Version: d5d83242a1d778ceb6d8b07c6b491cf7483ca112
Version: 73c359d1d356cf10236ccd358bd55edab33e9424
Version: 73c359d1d356cf10236ccd358bd55edab33e9424
Version: 73c359d1d356cf10236ccd358bd55edab33e9424
Version: 8382e92f90b601acf6d426121e6f4991502e767d
Version: 3b75f627b73d96787a493e2f1187543ba9c056a4
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   Linux Linux Version: 6.13
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    "cveId": "CVE-2025-22048",
    "datePublished": "2025-04-16T14:12:07.679Z",
    "dateReserved": "2024-12-29T08:45:45.810Z",
    "dateUpdated": "2025-05-26T05:17:20.353Z",
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}


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