CVE-2026-46243 Affecting libperf package, versions <0:6.12.0-211.20.1.el10_2


Severity

Recommended
high

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.14% (5th percentile)

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  • Snyk IDSNYK-ALMALINUX10-LIBPERF-17250754
  • published9 Jun 2026
  • disclosed8 Jun 2026

Introduced: 8 Jun 2026

NewCVE-2026-46243  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:10 libperf to version 0:6.12.0-211.20.1.el10_2 or higher.
This issue was patched in ALSA-2026:23329.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libperf package and not the libperf package as distributed by AlmaLinux. See How to fix? for AlmaLinux:10 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

smb: client: reject userspace cifs.spnego descriptions

cifs.spnego key descriptions contain authority-bearing fields such as pid, uid, creduid, and upcall_target that cifs.upcall treats as kernel-originating inputs. However, userspace can also create keys of this type through request_key(2) or add_key(2), allowing those fields to be supplied without CIFS origin.

Only accept cifs.spnego descriptions while CIFS is using its private spnego_cred to request the key.

CVSS Base Scores

version 3.1