CVE-2025-38586bpf, arm64: Fix fp initialization for exception boundary
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | 5d4fa9ec5643a5c75d3c1e6abf50fb9284caf1ff builds before 0dbef493cae7d451f740558665893c000adb2321; from 5d4fa9ec5643a5c75d3c1e6abf50fb9284caf1ff before e23184725dbb72d5d02940222eee36dbba2aa422; 5d4fa9ec5643a5c75d3c1e6abf50fb9284caf1ff builds before 1ce30231e0a2c8c361ee5f8f7f265fc17130adce; from 5d4fa9ec5643a5c75d3c1e6abf50fb9284caf1ff before b114fcee766d5101eada1aca7bb5fd0a86c89b35 | CNA record |
linux linux_kernel linux:linux_kernel | from 6.12 before 6.12.42; from 6.13 before 6.15.10; from 6.16 before 6.16.1 | NVD |
References
- https://git.kernel.org/stable/c/0dbef493cae7d451f740558665893c000adb2321patch
- https://git.kernel.org/stable/c/e23184725dbb72d5d02940222eee36dbba2aa422patch
- https://git.kernel.org/stable/c/1ce30231e0a2c8c361ee5f8f7f265fc17130adcepatch
- https://git.kernel.org/stable/c/b114fcee766d5101eada1aca7bb5fd0a86c89b35patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.