CVE-2025-38586

MEDIUM EPSS 4.2%
Published Aug 19, 202510mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Aug 19, 2025 10mo ago
Last Modified Jun 17, 2026 2w ago

Description

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 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
4.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 3

VendorProductVersionRange
linuxlinux_kernel*≥6.12  –  <6.12.42
linuxlinux_kernel*≥6.13  –  <6.15.10
linuxlinux_kernel*≥6.16  –  <6.16.1

References 4

  • git.kernel.org https://git.kernel.org/stable/c/0dbef493cae7d451f740558665893c000adb2321
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1ce30231e0a2c8c361ee5f8f7f265fc17130adce
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b114fcee766d5101eada1aca7bb5fd0a86c89b35
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e23184725dbb72d5d02940222eee36dbba2aa422
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0dbef493cae7d451f740558665893c000adb2321
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1ce30231e0a2c8c361ee5f8f7f265fc17130adce
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b114fcee766d5101eada1aca7bb5fd0a86c89b35
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e23184725dbb72d5d02940222eee36dbba2aa422
    Patch