What is CVE-2026-31710?

CVE-2026-31710 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 7.0 onward and patched in 7.0.2 and 7.1-rc1. CVE-2026-31710 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-31710?

CVE-2026-31710 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2026-31710?

Yes, CVE-2026-31710 has been patched. Fixed versions include 7.0.2 and 7.1-rc1. If you are running Linux kernel 7.0 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-31710 actively exploited?

CVE-2026-31710 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-31710

Medium

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.

Package Linux Kernel

Published 2026-05-01

Last modified 2026-05-06

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected versions

Linux kernel versions 7.0 and later are affected. Fixed in 7.0.2, 7.1-rc1 and their respective stable series.

Affected from

≥ 7.0

Fixed in

✓ 7.0.2 7.0.x ✓ 7.1-rc1

References

The following references provide additional information about CVE-2026-31710 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/c4d3fc5844d685441befd0caaab648321013cdfd
Patch
Kernel patch commit
https://git.kernel.org/stable/c/fbbfcf35e1ee3396631f3dc6214cb626aa9814c3
Patch

Details

CVE ID CVE-2026-31710

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2026-05-01

Modified 2026-05-06

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-31710?

CVE-2026-31710 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 7.0 onward and has been patched in 7.0.2 and 7.1-rc1. CVE-2026-31710 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-31710?

CVE-2026-31710 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2026-31710?

Yes — CVE-2026-31710 has been patched. Fixed versions include 7.0.2 and 7.1-rc1. If you are running Linux kernel 7.0 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-31710 actively exploited?

No — CVE-2026-31710 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.