Full Report
Red Hat security advisory (AV26-369)
Analysis Summary
# Vulnerability: Red Hat Linux Kernel Multiple Vulnerabilities (AV26-369)
## CVE Details
- **CVE ID:** CVE IDs vary by specific advisory (Refer to Red Hat Security Portal for full list under AV26-369)
- **CVSS Score:** Range typically 7.0 - 8.0 (High)
- **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 (specifically including RHEL 7, 8, and 9 streams depending on the platform)
- **Configurations:** Systems running affected Linux kernel versions on various architectures (x86_64, s390x, ppc64le, aarch64).
## Vulnerability Description
This advisory covers a collection of security updates for the Linux kernel. Technical flaws typically addressed in these Red Hat updates include memory management errors, race conditions in networking protocols, or improper validation in filesystem drivers. These flaws can allow for local privilege escalation, denial of service (system crash), or potential information disclosure from kernel memory.
## Exploitation
- **Status:** Not exploited in the wild (based on current reporting)
- **Complexity:** Medium to High (most kernel exploits require specific local conditions)
- **Attack Vector:** Local (Most kernel vulnerabilities require local shell access, though some networking flaws may be reachable via Network)
## Impact
- **Confidentiality:** Moderate to High (Potential kernel memory leaks)
- **Integrity:** High (Potential for unauthorized privilege escalation to Root)
- **Availability:** High (Potential for system-wide Denial of Service/Kernel Panic)
## Remediation
### Patches
Red Hat has released updated kernel packages for the following repositories:
- `kpatch-patch` versions specific to the running kernel
- `kernel`, `kernel-rt`, and `kernel-devel` packages
- **Update Command:** `yum update kernel` or `dnf update kernel`
### Workarounds
- No universal workaround; mitigation depends on the specific CVE (e.g., disabling specific unprivileged user namespaces or specific hardware features if not required).
## Detection
- **Indicators of Compromise:** Unexpected system reboots (Kernel panics), unauthorized elevation of privileges in audit logs, or unusual `/proc/` or `/sys/` filesystem activity.
- **Detection Methods:**
- Use `yum check-update` or `dnf check-update` to identify pending security patches.
- Audit kernel logs using `dmesg` or `journalctl -k`.
## References
- Red Hat Security Advisories: [https://access.redhat[.]com/security/security-updates/security-advisories]
- Canadian Centre for Cyber Security Advisory: [https://www.cyber.gc[.]ca/en/alerts-advisories/red-hat-security-advisory-av26-369]
- Red Hat CVE Database: [https://access.redhat[.]com/security/cve/]