Answer in brief
CVE-2025-38169 records a High severity (CVSS 7.8) vulnerability in arm64/fpsimd: Avoid clobbering kernel FPSIMD state with SMSTOP. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=e92bee9f861b466c676f0200be3e46af7bc4ac6b <55d52af498daea75aa03ba9b7e444c8ae495ac20 || >=e92bee9f861b466c676f0200be3e46af7bc4ac6b <a305821f597ec943849d3e53924adb88c61ed682 || >=e92bee9f861b466c676f0200be3e46af7bc4ac6b <01098d893fa8a6edb2b56e178b798e3e6b674f02 || e003c485ac82a9f8de4204912ed059ac6dd4257c || 25b90cd122d546823da90b916f7c3289dfe83a99 || >=6.8.12 <6.9 || >=6.9.3 <6.10 | 55d52af498daea75aa03ba9b7e444c8ae495ac20, a305821f597ec943849d3e53924adb88c61ed682, 01098d893fa8a6edb2b56e178b798e3e6b674f02, 6.9, 6.10 |
| Linux/Linuxgeneric | 6.10 | Not reported |
Published upstream
Jul 3, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: arm64/fpsimd: Avoid clobbering kernel FPSIMD state with SMSTOP On system with SME, a thread's kernel FPSIMD state may be erroneously clobbered during a context switch immediately after that state is restored. Systems without SME are unaffected. If the CPU happens to be in streaming SVE mode before a context switch to a thread with kernel FPSIMD state, fpsimd_thread_switch() will restore the kernel FPSIMD state using fpsimd_load_kernel_state() while the CPU is still in streaming SVE mode. When fpsimd_thread_switch() subsequently calls fpsimd_flush_cpu_state(), this will execute an SMSTOP, causing an exit from streaming SVE mode. The exit from streaming SVE mode will cause the hardware to reset a number of FPSIMD/SVE/SME registers, clobbering the FPSIMD state. Fix this by calling fpsimd_flush_cpu_state() before restoring the kernel FPSIMD state.
Quoted source text, attributed separately from HOL analysis.