CVE-2025-38586

Description

In the Linux kernel, the following vulnerability has been resolved:bpf, arm64: Fix fp initialization for exception boundaryIn the ARM64 BPF JIT when prog->aux->exception_boundary is set for a BPFprogram, find_used_callee_regs() is not called because for a programacting as exception boundary, all callee saved registers are saved.find_used_callee_regs() sets ctx->fp_used = true; when it sees FPbeing used in any of the instructions.For programs acting as exception boundary, ctx->fp_used remains falseeven if frame pointer is used by the program and therefore, FP is notset-up for such programs in the prologue. This can cause the kernel tocrash due to a pagefault.Fix it by setting ctx->fp_used = true for exception boundary programs asfp is always saved in such programs.

Risk Information

Base Score

5.5

MODERATE

Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS Score

Exploitation Probability

0.015

Associated Vulnerability

No records found

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234