Answer in brief
CVE-2025-40129 records a High severity (CVSS 7.5) vulnerability in sunrpc: fix null pointer dereference on zero-length checksum. 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 7.5. 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.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=0653028e8f1c97fec30710813a001ad8a2ec34f4 <81cec07d303186d0d8c623ef8b5ecd3b81e94cf6 || >=0653028e8f1c97fec30710813a001ad8a2ec34f4 <affc03d44921f493deaae1d33151e3067a6f9f8f || >=0653028e8f1c97fec30710813a001ad8a2ec34f4 <ab9a70cd2386a0d70c164b0905dd66bc9af52e77 || >=0653028e8f1c97fec30710813a001ad8a2ec34f4 <6df164e29bd4e6505c5a2e0e5f1e1f6957a16a42 | 81cec07d303186d0d8c623ef8b5ecd3b81e94cf6, affc03d44921f493deaae1d33151e3067a6f9f8f, ab9a70cd2386a0d70c164b0905dd66bc9af52e77, 6df164e29bd4e6505c5a2e0e5f1e1f6957a16a42 |
| Linux/Linuxgeneric | 6.3 | Not reported |
Published upstream
Nov 12, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 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: sunrpc: fix null pointer dereference on zero-length checksum In xdr_stream_decode_opaque_auth(), zero-length checksum.len causes checksum.data to be set to NULL. This triggers a NPD when accessing checksum.data in gss_krb5_verify_mic_v2(). This patch ensures that the value of checksum.len is not less than XDR_UNIT.
Quoted source text, attributed separately from HOL analysis.