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.
References
Configurations
Configuration 1 (hide)
|
History
26 Nov 2025, 17:58
| Type | Values Removed | Values Added |
|---|---|---|
| CWE | CWE-476 | |
| First Time |
Linux linux Kernel
Linux |
|
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 5.5 |
| CPE | cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | |
| References | () https://git.kernel.org/stable/c/0dbef493cae7d451f740558665893c000adb2321 - Patch | |
| References | () https://git.kernel.org/stable/c/1ce30231e0a2c8c361ee5f8f7f265fc17130adce - Patch | |
| References | () https://git.kernel.org/stable/c/b114fcee766d5101eada1aca7bb5fd0a86c89b35 - Patch | |
| References | () https://git.kernel.org/stable/c/e23184725dbb72d5d02940222eee36dbba2aa422 - Patch |
Information
Published : 2025-08-19 17:15
Updated : 2025-11-26 17:58
NVD link : CVE-2025-38586
Mitre link : CVE-2025-38586
CVE.ORG link : CVE-2025-38586
JSON object : View
Products Affected
linux
- linux_kernel
CWE
CWE-476
NULL Pointer Dereference