High 7.5Published Nov 12, 2025

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

Updated under an hour ago (Oct 26, 2026, 6:23 PM ET)

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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

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.