CVE-2025-22048

MEDIUM EPSS 6.1%
Published Apr 16, 20251y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Apr 16, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

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).

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
6.1% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Affected Products 6

VendorProductVersionRange
linuxlinux_kernel*≥6.1.120  –  <6.2
linuxlinux_kernel*≥6.6.64  –  <6.6.87
linuxlinux_kernel*≥6.11.11  –  <6.12
linuxlinux_kernel*≥6.12.2  –  <6.12.23
linuxlinux_kernel*≥6.13  –  <6.13.11
linuxlinux_kernel*≥6.14  –  <6.14.2

References 5

  • git.kernel.org https://git.kernel.org/stable/c/223d565d8892481684091cfbaf3466f2b0e289d3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/60f3caff1492e5b8616b9578c4bedb5c0a88ed14
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/780628a780b622759d9e5adc76d15432144da1a3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7df2696256a034405d3c5a71b3a4c54725de4404
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/996e90ab446641553e8e21707b38b9709605e0e0
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/223d565d8892481684091cfbaf3466f2b0e289d3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/60f3caff1492e5b8616b9578c4bedb5c0a88ed14
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/780628a780b622759d9e5adc76d15432144da1a3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7df2696256a034405d3c5a71b3a4c54725de4404
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/996e90ab446641553e8e21707b38b9709605e0e0
    Patch