CVE-2026-12505: Execution with Unnecessary Privileges in Red Hat Red Hat Enterprise Linux 10
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.
AI Analysis
Technical Summary
This advisory covers Red Hat OpenShift Container Platform 4.22.7, which contains security updates for several vulnerabilities. Notably, CVE-2026-12505 is a local privilege escalation vulnerability in cifs-utils caused by a forged cifs.spnego key description in cifs.upcall. Additional fixes include a kernel vulnerability (CVE-2026-43037) related to clearing skb2->cb[] in ip4ip6_err() and an information disclosure issue in Podman (CVE-2026-57231) via malicious container image environment variables. The advisory confirms that these issues are addressed in the updated container images and RPM packages. Users should upgrade to the fixed versions to remediate these vulnerabilities.
Potential Impact
The vulnerabilities fixed in this update include a critical local privilege escalation in cifs-utils, which could allow an attacker with local access to gain elevated privileges. The kernel fix addresses a potential issue in IPv6 tunneling code, and the Podman fix mitigates information disclosure risks from malicious container images. These vulnerabilities collectively pose significant security risks if left unpatched, particularly in environments running OpenShift Container Platform 4.22.
Mitigation Recommendations
A patch is available in Red Hat OpenShift Container Platform 4.22.7. Users should upgrade to this version using the OpenShift CLI (oc) or web console as soon as the update is available in their release channel. Detailed upgrade instructions are provided by Red Hat in their official documentation. No additional mitigation steps are indicated beyond applying the official update.
CVE-2026-12505: Execution with Unnecessary Privileges in Red Hat Red Hat Enterprise Linux 10
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 v3.1
Score 7.8high
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This advisory covers Red Hat OpenShift Container Platform 4.22.7, which contains security updates for several vulnerabilities. Notably, CVE-2026-12505 is a local privilege escalation vulnerability in cifs-utils caused by a forged cifs.spnego key description in cifs.upcall. Additional fixes include a kernel vulnerability (CVE-2026-43037) related to clearing skb2->cb[] in ip4ip6_err() and an information disclosure issue in Podman (CVE-2026-57231) via malicious container image environment variables. The advisory confirms that these issues are addressed in the updated container images and RPM packages. Users should upgrade to the fixed versions to remediate these vulnerabilities.
Potential Impact
The vulnerabilities fixed in this update include a critical local privilege escalation in cifs-utils, which could allow an attacker with local access to gain elevated privileges. The kernel fix addresses a potential issue in IPv6 tunneling code, and the Podman fix mitigates information disclosure risks from malicious container images. These vulnerabilities collectively pose significant security risks if left unpatched, particularly in environments running OpenShift Container Platform 4.22.
Mitigation Recommendations
A patch is available in Red Hat OpenShift Container Platform 4.22.7. Users should upgrade to this version using the OpenShift CLI (oc) or web console as soon as the update is available in their release channel. Detailed upgrade instructions are provided by Red Hat in their official documentation. No additional mitigation steps are indicated beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:39576
- Cve Count
- 1
- Additional Cves
- []
- Cvss Version
- 3.1
Threat ID: 6a577ef368715ace43b415d1
Added to database: 07/15/2026, 12:37:07 UTC
Last enriched: 08/11/2026, 20:30:28 UTC
Last updated: 08/29/2026, 22:52:08 UTC
Views: 93
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