CVE-2026-31710

CVE-2026-31710

Medium · published May 1, 2026

CVSS v3.1
5.5
EPSS
0%
Percentile
3.3
In the wild
Unconfirmed
What it is

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

smb: client: fix dir separator in SMB1 UNIX mounts

When calling cifs_mount_get_tcon() with SMB1 UNIX mounts,

@cifs_sb->mnt_cifs_flags needs to be read or updated only after

calling reset_cifs_unix_caps(), otherwise it might end up with missing

CIFS_MOUNT_POSIXACL and CIFS_MOUNT_POSIX_PATHS bits.

This fixes the wrong dir separator used in paths caused by the missing

CIFS_MOUNT_POSIX_PATHS bit in cifs_sb_info::mnt_cifs_flags.

The record
Technical detail
CVSS v3.1
5.5 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00143 · 3.3th percentile
Published
2026-05-01T18:16Z
Affected products (8)
ProductVersionsFixed in
linux/linux_kernel≥ 7.0.1, < 7.0.27.0.2
linux/linux_kernelall versions—
linux/linux_kernelall versions—
linux/linux_kernelall versions—
linux/linux_kernelall versions—
linux/linux_kernelall versions—
linux/linux_kernelall versions—
linux/linux_kernelall versions—
References (2)
https://git.kernel.org/stable/c/c4d3fc5844d685441befd0caaab648321013cdfd · 416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fbbfcf35e1ee3396631f3dc6214cb626aa9814c3 · 416baaa9-dc9f-4396-8d5f-8c081fb06d67
EPSS history
Timeline
  • 01 MAY 13:56Z
    smb: client: fix dir separator in SMB1 UNIX mounts
    cvelistv5