CVE-2026-31710
kernel: smb: client: fix dir separator in SMB1 UNIX mounts
Severity
UnknownRed Hat Product Security
CVSS
Review impact separately from score.
Published · May 1, 2026
Updated · June 28, 2026
Description
A flaw was found in the Linux kernel's Server Message Block (SMB) client. When mounting SMB1 UNIX shares, the system may incorrectly handle directory separators. This issue arises because flags related to POSIX Access Control Lists (ACLs) and paths are not properly updated, leading to the use of an incorrect directory separator in paths. This could prevent legitimate users from accessing files or directories as intended, potentially leading to a denial of service for client operations.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')