Ubuntu USN-7835-4 Patches Linux Kernel Including CVE-2024-1086
Category:Advisory / Linux
Canonical issued USN-7835-4 addressing critical Linux kernel vulnerabilities affecting Ubuntu 22.04 LTS and hardware enablement (HWE) variants. The advisory resolves multiple privilege escalation and denial-of-service issues across networking and memory subsystems. What's interesting: includes fixes for CVE-2024-1086—the netfilter nf_tables use-after-free that CISA warned is now in ransomware toolchains. The update also addresses several memory management flaws discovered through fuzzing initiatives. Systems must be rebooted to apply kernel patches. Cloud and server instances with delayed patching windows face increased exploitation risk, particularly for the ransomware-exploited CVE-2024-1086.
CORTEX Protocol Intelligence Assessment
The timing is notable—CVE-2024-1086 is the same vulnerability CISA flagged for active ransomware exploitation. Ubuntu patching it again in a hardware enablement update suggests lingering exposure in specific kernel variants. Memory management flaws from fuzzing initiatives indicate proactive vulnerability discovery is yielding results. Standard kernel patch deployment challenges apply: cloud instances often lag on updates due to reboot requirements disrupting services.
Strategic Intelligence Guidance
- Affects: Ubuntu 22.04 LTS and hardware enablement (HWE) variants
- Key CVE: CVE-2024-1086 (netfilter nf_tables privilege escalation, active ransomware exploitation)
- Additional fixes: memory corruption and netfilter vulnerabilities from fuzzing
- Remediation: update kernel package + reboot to activate patches
- Risk: local privilege escalation, potential kernel code execution
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Intelligence Source: USN-7835-4: Linux kernel (HWE) vulnerabilities | Nov 1, 2025