sunrpc: fix client side handling of tls alerts (Linux Linux)

CVE-2025-38571
HIGH 8.2

At a glance

Source
NVD
EPSS
EPSS 0.35 % · percentile 28 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Modified

Description

In the Linux kernel, the following vulnerability has been resolved: sunrpc: fix client side handling of tls alerts A security exploit was discovered in NFS over TLS in tls_alert_recv due to its assumption that there is valid data in the msghdr's iterator's kvec. Instead, this patch proposes the rework how control messages are setup and used by sock_recvmsg(). If no control message structure is setup, kTLS layer will read and process TLS data record types. As soon as it encounters a TLS control message, it would return an error. At that point, NFS can setup a kvec backed control buffer and read in the control message such as a TLS alert. Scott found that a msg iterator can advance the kvec pointer as a part of the copy process thus we need to revert the iterator before calling into the tls_alert_recv.

References

Scores

VersionScoreVectorScored by
CVSS 3.1HIGH 8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:HLinux
CVSS 3.1HIGH 8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)
CVSS 3.1MEDIUM 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HNVD · nvd@nist.gov (Primary)

European references

CERT-FR advisories

Affected configurations (NVD CPE)

Affected products

ProductVersions
Linux · Linuxaffected dea034b963c8901bdcc3d3880c04f0d75c95112f < a55b3d15331859d9fdd261cfa6d34ca2aeb0fb95 ; affected dea034b963c8901bdcc3d3880c04f0d75c95112f < c36b2fbd60e8f9c6f975522130998608880c93be ; affected dea034b963c8901bdcc3d3880c04f0d75c95112f < 3ee397eaaca4fa04db21bb98c8f1d0c6cc525368 ; affected dea034b963c8901bdcc3d3880c04f0d75c95112f < 3feada5baf4dc96e151ff2ca54630e1d274e5458 ; affected dea034b963c8901bdcc3d3880c04f0d75c95112f < cc5d59081fa26506d02de2127ab822f40d88bc5a
Linux · Linuxaffected 6.5 ; unaffected 0 < 6.5 ; unaffected 6.6.102 ≤ 6.6.* ; unaffected 6.12.42 ≤ 6.12.* ; unaffected 6.15.10 ≤ 6.15.* ; unaffected 6.16.1 ≤ 6.16.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD