High 7.5Published Nov 12, 2025

CVE-2025-40129sunrpc: fix null pointer dereference on zero-length checksum

Updated under an hour ago (2026-10-19 06:20 UTC)

Does this affect you?

It affects Linux. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

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.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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: Deferred
Record last updated: Oct 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	0653028e8f1c97fec30710813a001ad8a2ec34f4 builds before 81cec07d303186d0d8c623ef8b5ecd3b81e94cf6; from 0653028e8f1c97fec30710813a001ad8a2ec34f4 before affc03d44921f493deaae1d33151e3067a6f9f8f; from 0653028e8f1c97fec30710813a001ad8a2ec34f4 before ab9a70cd2386a0d70c164b0905dd66bc9af52e77; 0653028e8f1c97fec30710813a001ad8a2ec34f4 builds before 6df164e29bd4e6505c5a2e0e5f1e1f6957a16a42	CNA record

References

https://git.kernel.org/stable/c/81cec07d303186d0d8c623ef8b5ecd3b81e94cf6
https://git.kernel.org/stable/c/affc03d44921f493deaae1d33151e3067a6f9f8f
https://git.kernel.org/stable/c/ab9a70cd2386a0d70c164b0905dd66bc9af52e77
https://git.kernel.org/stable/c/6df164e29bd4e6505c5a2e0e5f1e1f6957a16a42

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.