Full Report
Red Hat security advisory (AV26-688)
Analysis Summary
# Vulnerability: Red Hat Linux Kernel Multiple Vulnerabilities (July 2026 Updates)
## CVE Details
- **CVE ID:** Multiple (Refer to Red Hat Security Portal for specific IDs)
- **CVSS Score:** Varies by specific CVE (Typically ranging from Medium to High)
- **CWE:** Commonly includes CWE-119 (Improper Restriction of Operations within the Bounds of a Memory Buffer) and CWE-416 (Use After Free)
## 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:**
- RHEL 7, 8, and 9 (Multiple platforms including x86_64, s390x, ppc64le, and aarch64)
- **Configurations:** Systems running affected Linux kernel versions across documented architectures.
## Vulnerability Description
This advisory covers a collection of security updates for the Linux kernel. These vulnerabilities typically involve flaws in memory management, driver handling, or network stack processing. Technical details usually include race conditions, integer overflows, or improper input validation that could allow locally authenticated users to escalate privileges, cause a denial of service (system crash), or potentially leak sensitive kernel memory information.
## Exploitation
- **Status:** Not exploited (Based on typical Red Hat advisory release cycles; check specific CVEs for individual status)
- **Complexity:** Medium to High (Many kernel exploits require specific local conditions or race condition timing)
- **Attack Vector:** Local / Network (Varies by specific CVE; kernel vulnerabilities are frequently local privilege escalation vectors)
## Impact
- **Confidentiality:** Moderate to High
- **Integrity:** High
- **Availability:** High
## Remediation
### Patches
- **Red Hat Enterprise Linux 9:** Update to the latest kernel version (e.g., `kernel-5.14.0-xxx` or later as specified in advisory).
- **Red Hat Enterprise Linux 8:** Update to the latest kernel version (e.g., `kernel-4.18.0-xxx` or later).
- **Red Hat Enterprise Linux 7:** Update to the latest kernel version (e.g., `kernel-3.10.0-xxx` or later).
- Run `yum update kernel` or `dnf update kernel` and **reboot the system** to apply changes.
### Workarounds
- No universal workaround exists for kernel-level flaws.
- Restrict local access to trusted users only.
- Disable unnecessary kernel modules to reduce the attack surface.
## Detection
- **Indicators of Compromise:** Unusual system crashes (Kernel Panics), unexpected privilege escalation by local users, or unauthorized changes to system-level files.
- **Detection methods and tools:**
- Use `auditd` to monitor suspicious system calls.
- Utilize Red Hat Insights to identify vulnerable hosts within the environment.
## References
- Red Hat Security Advisories: hxxps[://]access[.]redhat[.]com/security/security-updates/security-advisories
- Canadian Centre for Cyber Security Bulletin: hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/red-hat-security-advisory-av26-688