Full Report
Red Hat security advisory (AV26-392)
Analysis Summary
# Vulnerability: Multiple Vulnerabilities in Red Hat Linux Kernel
## CVE Details
- **CVE ID:** Multiple (Refer to Red Hat Advisory Link for specific identifiers)
- **CVSS Score:** Variable (Up to Critical severity)
- **CWE:** Various (Typically including Memory Corruption, Privilege Escalation, or Denial of Service)
## 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 and platforms (e.g., RHEL 7, 8, and 9)
- **Configurations:** Systems running the Linux kernel on the aforementioned distributions.
## Vulnerability Description
This advisory refers to a collection of security updates released by Red Hat between April 20 and April 26, 2026. These updates specifically target flaws within the Linux kernel components. Common vulnerabilities in this context usually involve buffer overflows, use-after-free conditions, or race conditions that could lead to system instability or unauthorized access.
## Exploitation
- **Status:** Dependent on specific CVE; check Red Hat Portal for active exploitation status.
- **Complexity:** Variable (Ranges from Low to High depending on the specific flaw).
- **Attack Vector:** Primarily Local (Privilege Escalation) and Network (Remote Denial of Service).
## Impact
- **Confidentiality:** High (Potential for unauthorized data access).
- **Integrity:** High (Potential for system-level modification).
- **Availability:** High (Potential for system crashes or kernel panics).
## Remediation
### Patches
Red Hat has released updated kernel packages for all affected platforms. Users are advised to perform a system update:
- `yum update kernel` or `dnf update kernel`
- A system reboot is required to apply kernel changes.
### Workarounds
- No specific workarounds are provided in the high-level advisory; applying the official vendor patches is the recommended course of action.
## Detection
- **Indicators of compromise:** Unusual kernel panics, unexpected reboots, or unauthorized users gaining `root` privileges.
- **Detection methods and tools:**
- Use `rpm -q kernel` to verify the currently installed version against the patched version listed in the Red Hat portal.
- Audit logs (e.g., `/var/log/audit/audit.log`) for suspicious syscalls.
## References
- **Vendor advisories:** hxxps[://]access[.]redhat[.]com/security/security-updates/security-advisories
- **Original Source:** hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/red-hat-security-advisory-av26-392