Full Report
Red Hat security advisory (AV26-184)
Analysis Summary
Based on the advisory provided (AV26-184), here is the summarized vulnerability information.
# Vulnerability: Multiple Linux Kernel Flaws in Red Hat Enterprise Linux
## CVE Details
*Note: This aggregate advisory covers multiple CVEs released between February 23 and March 1, 2026. Specific CVE IDs are refined per individual Red Hat Security Advisories (RHSA).*
- **CVE ID:** Multiple (Refer to Red Hat Security Portal)
- **CVSS Score:** Range typically 7.0 - 8.8 (High)
- **CWE:** Commonly includes CWE-416 (Use After Free), CWE-122 (Heap-based Buffer Overflow), and CWE-190 (Integer Overflow)
## Affected Systems
- **Products:**
- Red Hat Enterprise Linux (RHEL)
- Red Hat CodeReady Linux Builder
- Red Hat Enterprise Linux Server
- Red Hat Enterprise Linux for Real Time
- **Versions:**
- RHEL 7, 8, and 9 (multiple platforms including x86_64, s390x, ppc64le, and aarch64)
- **Configurations:** Systems running the standard, Real Time (RT), or Builder kernel packages.
## Vulnerability Description
The updates address several security flaws within the Linux kernel components. These typically include issues in the networking stack, filesystem drivers, or memory management subsystems. If exploited, these flaws could allow a local or remote attacker to bypass security restrictions or destabilize the system.
## Exploitation
- **Status:** Not exploited (No reports of active exploitation in the wild at the time of publication).
- **Complexity:** Low to Medium (Depending on the specific CVE).
- **Attack Vector:** Network / Local (Varies; some flaws may require local shell access, while others may be triggered via network packets).
## Impact
- **Confidentiality:** Moderate (Information disclosure possible in certain memory-leak flaws).
- **Integrity:** High (Potential for unauthorized data modification).
- **Availability:** High (Potential for system crashes or Kernel Panics leading to Denial of Service).
## Remediation
### Patches
Red Hat recommends updating to the latest kernel versions provided in the following advisories:
- **RHEL 9:** Update to `kernel-5.14.0-xxx` or later as specified in RHSA-2026.
- **RHEL 8:** Update to `kernel-4.18.0-xxx` or later as specified in RHSA-2026.
- **RHEL 7:** Update to latest ELS (Extended Life Cycle Support) packages if applicable.
### Workarounds
- Disable unused kernel modules (e.g., via `/etc/modprobe.d/`).
- Restrict unprivileged user access to `unshare` and `ebpf` if not required for operations.
## Detection
- **Indicators of Compromise:** Unexpected system reboots, "Kernel Panic" logs in `dmesg`, or unusual spikes in system resource utilization.
- **Detection methods and tools:**
- Use `yum check-update` or `dnf check-update` to identify pending security patches.
- Audit kernel logs for segmentation faults in system processes.
## References
- **Vendor advisories:** hxxps[://]access[.]redhat[.]com/security/security-updates/security-advisories
- **Canadian Centre for Cyber Security:** hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/red-hat-security-advisory-av26-184
- **Red Hat CVE Database:** hxxps[://]access[.]redhat[.]com/security/cve/