In the Linux kernel, the following vulnerability has been resolved:
bpf, arm64: Fix fp initialization for exception boundary
In the ARM64 BPF JIT when prog->aux->exception_boundary is set for a BPF
program, find_used_callee_regs() is not called because for a program
acting as exception boundary, all callee saved registers are saved.
find_used_callee_regs() sets `ctx->fp_used = true;` when it sees FP
being used in any of the instructions.
For programs acting as exception boundary, ctx->fp_used remains false
even if frame pointer is used by the program and therefore, FP is not
set-up for such programs in the prologue. This can cause the kernel to
crash due to a pagefault.
Fix it by setting ctx->fp_used = true for exception boundary programs as
fp is always saved in such programs.
CVSS
No CVSS.
References
Configurations
No configuration.
History
19 Aug 2025, 17:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Information
Published : 2025-08-19 17:15
Updated : 2025-08-19 17:15
NVD link : CVE-2025-38586
Mitre link : CVE-2025-38586
CVE.ORG link : CVE-2025-38586
JSON object : View
Products Affected
No product.
CWE
No CWE.