CVE-2026-91205: Race Condition Enabling Link Following in Red Hat Red Hat Enterprise Linux 10
A flaw was found in cockpit-files. A local unprivileged attacker can exploit a race condition during directory creation with owner assignment. By controlling a writable parent directory, the attacker can replace a newly created directory with a symbolic link (symlink) before the ownership change operation (chown) is applied. This allows the attacker to redirect the ownership change to an arbitrary file, potentially leading to information disclosure or unauthorized modification of sensitive files.
AI Analysis
Technical Summary
This vulnerability involves a race condition in the cockpit-files create_directory() function where an attacker can hijack the ownership change (chown) operation by substituting a newly created directory with a symbolic link. By exploiting this timing window, a local attacker with low privileges can redirect the ownership change to arbitrary files, potentially causing unauthorized disclosure or modification of sensitive data. The issue is tracked as CWE-363 (Race Condition Enabling Link Following). Red Hat has published an advisory indicating the vulnerability is under investigation, with no confirmed affected versions or patches at this time.
Potential Impact
If exploited, this vulnerability could allow a local unprivileged attacker to gain unauthorized access or modify sensitive files by redirecting ownership changes to arbitrary files via symbolic link manipulation. The confidentiality and integrity of affected systems could be compromised. Availability is not impacted. The attack requires local access, low privileges, and user interaction, with high attack complexity.
Mitigation Recommendations
Red Hat has not yet released a fix and the vulnerability is currently under investigation. There is no official patch or mitigation available at this time. Users should monitor the Red Hat advisory page for updates and apply any forthcoming patches promptly once released. No specific mitigations are currently recommended by Red Hat.
CVE-2026-91205: Race Condition Enabling Link Following in Red Hat Red Hat Enterprise Linux 10
Description
A flaw was found in cockpit-files. A local unprivileged attacker can exploit a race condition during directory creation with owner assignment. By controlling a writable parent directory, the attacker can replace a newly created directory with a symbolic link (symlink) before the ownership change operation (chown) is applied. This allows the attacker to redirect the ownership change to an arbitrary file, potentially leading to information disclosure or unauthorized modification of sensitive files.
CVSS v3.1
Score 6.0medium
Affected software
Red Hat
Red Hat Enterprise Linux 10
Red Hat
Red Hat Enterprise Linux 9
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a race condition in the cockpit-files create_directory() function where an attacker can hijack the ownership change (chown) operation by substituting a newly created directory with a symbolic link. By exploiting this timing window, a local attacker with low privileges can redirect the ownership change to arbitrary files, potentially causing unauthorized disclosure or modification of sensitive data. The issue is tracked as CWE-363 (Race Condition Enabling Link Following). Red Hat has published an advisory indicating the vulnerability is under investigation, with no confirmed affected versions or patches at this time.
Potential Impact
If exploited, this vulnerability could allow a local unprivileged attacker to gain unauthorized access or modify sensitive files by redirecting ownership changes to arbitrary files via symbolic link manipulation. The confidentiality and integrity of affected systems could be compromised. Availability is not impacted. The attack requires local access, low privileges, and user interaction, with high attack complexity.
Mitigation Recommendations
Red Hat has not yet released a fix and the vulnerability is currently under investigation. There is no official patch or mitigation available at this time. Users should monitor the Red Hat advisory page for updates and apply any forthcoming patches promptly once released. No specific mitigations are currently recommended by Red Hat.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-09-14T21:59:16.679Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-91205","vendor":"Red Hat"}]
Threat ID: 6aad91cb55bf5e2cf571918e
Added to database: 09/18/2026, 19:32:27 UTC
Last enriched: 09/18/2026, 19:47:43 UTC
Last updated: 09/19/2026, 03:01:24 UTC
Views: 5
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