Full Report
Red Hat security advisory (AV26-266)
Analysis Summary
# Vulnerability: Multiple Vulnerabilities in Red Hat Linux Kernel (AV26-266)
## CVE Details
- **CVE ID:** Multiple (Refer to specific Red Hat Advisories for CVE-2026-XXXXX series)
- **CVSS Score:** Varies (Ranging from Moderate to Critical)
- **CWE:** Commonly includes CWE-119 (Memory Corruption), CWE-416 (Use After Free), and CWE-20 (Improper Input Validation).
## Affected Systems
- **Products:**
- Red Hat CodeReady Linux Builder
- Red Hat Enterprise Linux (RHEL)
- Red Hat Enterprise Linux Server
- Red Hat Enterprise Linux for Real Time
- **Versions:** Multiple versions including 7, 8, and 9 (specific to platform architecture).
- **Configurations:** Systems running affected Linux kernel versions across x86_64, s390x, ppc64le, and aarch64 architectures.
## Vulnerability Description
This advisory represents a collection of security updates published between March 16 and 22, 2026. The flaws primarily reside within the Linux kernel components. Technical details typically involve memory management issues, race conditions in networking stacks, or improper boundary checks in kernel-mode drivers, which could allow for privilege escalation or denial of service.
## Exploitation
- **Status:** Not exploited in the wild (based on current advisory data).
- **Complexity:** Varies (Typically Low to Medium).
- **Attack Vector:** Varies (Includes Network and Local vectors depending on the specific CVE).
## Impact
- **Confidentiality:** High (Potential for unauthorized data access).
- **Integrity:** High (Potential for kernel-level modifications).
- **Availability:** High (Potential for system crashes or permanent DoS).
## Remediation
### Patches
Red Hat has released updated kernel packages. Users should update to the latest versions provided in the official repositories:
- `yum update kernel` or `dnf update kernel`
- Ensure the system is rebooted after the update to initialize the new kernel version.
### Workarounds
- No universal workaround is available; specific mitigations (such as disabling affected modules or protocols) depend on the individual CVEs listed in the full Red Hat advisory.
## Detection
- **Indicators of Compromise:** Unusual kernel panics, unexpected reboots, or unauthorized elevation of privileges for standard users.
- **Detection methods and tools:**
- Use `rpm -q kernel` to verify if the current version is among the patched releases.
- Utilize Red Hat Insights or OpenSCAP for vulnerability scanning.
## References
- Red Hat Security Advisories: hxxps[://]access[.]redhat[.]com/security/security-updates/security-advisories
- Canadian Centre for Cyber Security Advisory: hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/red-hat-security-advisory-av26-266