Answer in brief
CVE-2025-38586 records a High severity (CVSS 7.8) vulnerability in bpf, arm64: Fix fp initialization for exception boundary. 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 | >=5d4fa9ec5643a5c75d3c1e6abf50fb9284caf1ff <0dbef493cae7d451f740558665893c000adb2321 || >=5d4fa9ec5643a5c75d3c1e6abf50fb9284caf1ff <e23184725dbb72d5d02940222eee36dbba2aa422 || >=5d4fa9ec5643a5c75d3c1e6abf50fb9284caf1ff <1ce30231e0a2c8c361ee5f8f7f265fc17130adce || >=5d4fa9ec5643a5c75d3c1e6abf50fb9284caf1ff <b114fcee766d5101eada1aca7bb5fd0a86c89b35 | 0dbef493cae7d451f740558665893c000adb2321, e23184725dbb72d5d02940222eee36dbba2aa422, 1ce30231e0a2c8c361ee5f8f7f265fc17130adce, b114fcee766d5101eada1aca7bb5fd0a86c89b35 |
| Linux/Linuxgeneric | 6.12 | Not reported |
Published upstream
Aug 19, 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: 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.
Quoted source text, attributed separately from HOL analysis.