CVE-2026-12505
Cifs-utils: local privilege escalation via forged cifs.spnego key description in cifs.upcall
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.
INFO
Published Date :
June 18, 2026, 3:34 a.m.
Last Modified :
June 18, 2026, 3:34 a.m.
Remotely Exploit :
No
Source :
redhat
Affected Products
The following products are affected by CVE-2026-12505
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | 53f830b8-0a3f-465b-8143-3b8a9948e749 |
Solution
- Update the cifs-utils package to the latest version.
- Apply vendor patches if available.
- Review system configurations for unusual NSS modules.
- Limit access to privileged operations.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-12505 vulnerability anywhere in the article.