7.8

CVE-2026-12505: cifs-utils Execution with Unnecessary Privileges

CVSS: 7.8v3.1HighAwaiting analysis
AliasesMGASA-2026-0291SUSE-SU-2026:22888-1SUSE-SU-2026:2699-1
Published 18-06-2026Last modified 14-10-2026
Open JSON

Vulnerability summary

CVE-2026-12505 is a high (CVSS 7.8) Execution with Unnecessary Privileges vulnerability in cifs-utils. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 4.3% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.16%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 2
USN-8496-1USN-8496-2

Timeline

  1. 18-06-2026
    PublishedVulnerability first disclosed.
  2. 14-10-2026
    Last modifiedVulnerability information updated.

Description

A flaw was found in the cifs-utils package where the cifs.upcall helper fails to securely drop its root privileges before looking up user information inside a user-controlled environment. A local, low privileged attacker can exploit this by using a crafted request_key payload to trick the root-owned helper into entering a custom environment (namespace) containing a malicious NSS module. This forces the system to load the attacker's controlled NSS Module and configuration, allowing them to execute arbitrary commands as the root user, elevating their privileges and fully compromising the system.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.16%

Chance of exploitation in the next 30 days

Percentile

4%

Versus all other CVEs

30-day change

0.00 pp

From 0.16% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.16%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Suse17 products
  • cifs-utils&distro=SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS< 6.15-150400.3.21.1
  • cifs-utils&distro=SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS< 6.15-150400.3.21.1
  • cifs-utils&distro=SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS< 6.15-150400.3.21.1
  • cifs-utils&distro=SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS< 6.15-150400.3.21.1
  • cifs-utils&distro=SUSE Linux Enterprise Micro 5.3< 6.15-150400.3.21.1
Redhat6 products
  • cifs-utils< 0:7.6-1.el10_2 | < 0:7.0-5.el8_10 | < 0:7.6-2.el9_8
  • cifs-utils-debuginfo< 0:7.6-1.el10_2 | < 0:7.0-5.el8_10 | < 0:7.6-2.el9_8
  • cifs-utils-debugsource< 0:7.6-1.el10_2 | < 0:7.0-5.el8_10 | < 0:7.6-2.el9_8
  • cifs-utils-devel< 0:7.6-1.el10_2 | < 0:7.0-5.el8_10 | < 0:7.6-2.el9_8
  • pam_cifscreds< 0:7.6-1.el10_2 | < 0:7.0-5.el8_10 | < 0:7.6-2.el9_8
Mageia2 products
  • cifs-utils< 7.5-1.1.mga10
  • cifs-utils< 7.0-1.2.mga9
Debian1 product
  • cifs-utilsAll versions (No fix recorded) | < 2:7.4-1+deb13u1 | < 2:7.8-1
Ubuntu1 product
  • cifs-utilsAll versions (No fix recorded) | < 2:6.14-1ubuntu0.6 | < 2:7.0-2ubuntu0.5 | < 2:7.4-1ubuntu0.26.04.3

5 vendors · 27 products

References

27 links
Show all 27 references