CVE-2026-104715

Publication date 16 October 2026

Last updated 19 October 2026

Ubuntu priority

Cvss 3 Severity Score

Description

A non-privileged user can control a CIFS credentials file consumed by a privileged mount.cifs invocation, and the value from the credentials file is copied into the mount option string without validation. As a result, attacker-controlled mount options can be injected into the privileged mount.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
cifs-utils	26.10 stonking	Fixed in 2:7.4-1ubuntu3.1
	26.04 LTS resolute	Fixed in 2:7.4-1ubuntu0.26.04.4
	24.04 LTS noble	Fixed in 2:7.0-2ubuntu0.6
	22.04 LTS jammy	Fixed in 2:6.14-1ubuntu0.7
	20.04 LTS focal	Needs evaluation
	18.04 LTS bionic	Needs evaluation
	16.04 LTS xenial	Needs evaluation
	14.04 LTS trusty	Needs evaluation

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
cifs-utils	Upstream: https://git.samba.org/?p=cifs-utils.git;a=commit;h=d561eb914a389f6f2f009f13f0d09df0887bae72 Upstream: https://git.samba.org/?p=cifs-utils.git;a=commit;h=fa0ba5a155ef925bb7547cb4cdc36425a2f5b8f9

Severity score breakdown

CVSS version: CVSS v3.0

Base score 7.8 · High

Base metrics

Parameter	Value
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality impact	High
Integrity impact	High
Availability impact	High

Scores

Parameter	Value
Base score	7.8 · High
Exploitability score	-
Impact score	-

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

References

Related Ubuntu Security Notices (USN)

USN-8938-1
cifs-utils vulnerability
19 October 2026

Other references

https://www.cve.org/CVERecord?id=CVE-2026-104715