● Ubuntu USN · September 2026

Ubuntu Linux Security Advisory: September 2026 Kernel & Subsystem Triage

Triage of Ubuntu's September 2026 kernel rollups addressing critical io_uring memory corruption, eBPF verifier bounds, and network packet handling vulnerabilities.

34
Kernel CVEs Fixed
1
In-The-Wild Exploit
7.8
CVSS io_uring Flaw
High
Server Patch Urgency

Triage Eksekutif dan Penilaian Risiko

Canonical released coordinated Ubuntu Security Notices (USN) across 24.04 LTS and 22.04 LTS addressing 34 kernel security issues. The critical highlight is CVE-2024-0582 in the io_uring subsystem, an actively targeted use-after-free flaw that allows unprivileged local attackers to elevate privileges to root.

Matriks Triage Kerentanan Pilihan

Pengenal CVE Subsistem / Komponen Dampak CVSS Eksploitasi Aktif?
CVE-2024-0582io_uring / Ring BufferUse-After-Free / LPE7.8 HighYES (In-The-Wild)
CVE-2024-41090eBPF VerifierBounds Check Bypass7.1 HighNo
CVE-2024-41091Bluetooth L2CAPNull Pointer Dereference6.5 MediumNo
CVE-2024-41092Ext4 FilesystemOut-of-Bounds Read5.5 MediumNo
ANALISIS KODE PILIHAN

Deep Dive: Linux Kernel io_uring Privilege Escalation Teardown →

Inspect the exact C diff from fs/io_uring.c showing how registering an existing ring buffer caused a premature reference drop and slab-use-after-free.

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