CVE-2026-99052
kernel: selinux: preserve NATIVE_LABELS on already-initialized sb in set_mnt_opts
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 23, 2026
Updated · October 27, 2026
Description
A flaw was found in the Linux kernel. When a Network File System version 4 (NFSv4) share configured with security labels is mounted multiple times, the Security-Enhanced Linux (SELinux) subsystem fails to preserve native labeling flags on the reused filesystem. This flaw allows a local user to silently disable per-file security labeling across both existing and new mounts, leading to a bypass of mandatory access control policies.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.7CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N
CWE-281 · Improper Preservation of Permissions