Memory leak in Linux kernel - CVE-2024-26655

Vulnerability identifier: #VU88147

CSH Severity: Low

CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2024-26655

CWE-ID: CWE-401

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the posix_clock_open() function in kernel/time/posix-clock.c. A local user can perform a denial of service attack.

Linux kernel
Ubuntu
Fedora
linux-image-generic-hwe-24.04 (Ubuntu package)
linux-image-virtual-hwe-24.04 (Ubuntu package)
linux-image-virtual (Ubuntu package)
linux-image-kvm (Ubuntu package)
linux-image-generic-lpae (Ubuntu package)
linux-image-generic-64k-hwe-24.04 (Ubuntu package)
linux-image-generic-64k (Ubuntu package)
linux-image-generic (Ubuntu package)
linux-image-6.8.0-35-lowlatency-64k (Ubuntu package)
linux-image-6.8.0-35-lowlatency (Ubuntu package)
linux-image-6.8.0-35-generic-64k (Ubuntu package)
linux-image-6.8.0-35-generic (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-lowlatency-64k (Ubuntu package)
linux-image-gke (Ubuntu package)
linux-image-6.8.0-1004-gke (Ubuntu package)
linux-image-raspi (Ubuntu package)
linux-image-6.8.0-1005-raspi (Ubuntu package)
linux-image-oracle-64k (Ubuntu package)
linux-image-6.8.0-1006-oracle (Ubuntu package)
linux-image-6.8.0-1006-oracle-64k (Ubuntu package)
linux-image-oracle (Ubuntu package)
linux-image-6.8.0-1006-oem (Ubuntu package)
linux-image-ibm-lts-24.04 (Ubuntu package)
linux-image-ibm-classic (Ubuntu package)
linux-image-ibm (Ubuntu package)
linux-image-6.8.0-1006-ibm (Ubuntu package)
linux-image-oem-24.04 (Ubuntu package)
linux-image-oem-24.04a (Ubuntu package)
linux-image-6.8.0-1008-azure (Ubuntu package)
linux-image-6.8.0-1008-azure-fde (Ubuntu package)
linux-image-azure (Ubuntu package)
linux-image-azure-fde (Ubuntu package)
kernel-headers
kernel

Install update from vendor's website.

Linux kernel - update to 6.8.3
linux-image-generic-hwe-24.04 (Ubuntu package) - update to 6.8.0-35.35
linux-image-virtual-hwe-24.04 (Ubuntu package) - update to 6.8.0-35.35
linux-image-virtual (Ubuntu package) - update to 6.8.0-35.35
linux-image-kvm (Ubuntu package) - update to 6.8.0-35.35
linux-image-generic-lpae (Ubuntu package) - update to 6.8.0-35.35
linux-image-generic-64k-hwe-24.04 (Ubuntu package) - update to 6.8.0-35.35
linux-image-generic-64k (Ubuntu package) - update to 6.8.0-35.35
linux-image-generic (Ubuntu package) - update to 6.8.0-35.35
linux-image-6.8.0-35-lowlatency-64k (Ubuntu package) - update to 6.8.0-35.35.1
linux-image-6.8.0-35-lowlatency (Ubuntu package) - update to 6.8.0-35.35.1
linux-image-6.8.0-35-generic-64k (Ubuntu package) - update to 6.8.0-35.35+1
linux-image-6.8.0-35-generic (Ubuntu package) - update to 6.8.0-35.35+1
linux-image-lowlatency (Ubuntu package) - update to 6.8.0-35.35.1
linux-image-lowlatency-64k (Ubuntu package) - update to 6.8.0-35.35.1
linux-image-gke (Ubuntu package) - update to 6.8.0-1004.7
linux-image-6.8.0-1004-gke (Ubuntu package) - update to 6.8.0-1004.7
linux-image-raspi (Ubuntu package) - update to 6.8.0-1005.5
linux-image-6.8.0-1005-raspi (Ubuntu package) - update to 6.8.0-1005.5
linux-image-oracle-64k (Ubuntu package) - update to 6.8.0-1006.6
linux-image-6.8.0-1006-oracle (Ubuntu package) - update to 6.8.0-1006.6
linux-image-6.8.0-1006-oracle-64k (Ubuntu package) - update to 6.8.0-1006.6
linux-image-oracle (Ubuntu package) - update to 6.8.0-1006.6
linux-image-6.8.0-1006-oem (Ubuntu package) - update to 6.8.0-1006.6
linux-image-ibm-lts-24.04 (Ubuntu package) - update to 6.8.0-1006.6
linux-image-ibm-classic (Ubuntu package) - update to 6.8.0-1006.6
linux-image-ibm (Ubuntu package) - update to 6.8.0-1006.6
linux-image-6.8.0-1006-ibm (Ubuntu package) - update to 6.8.0-1006.6
linux-image-oem-24.04 (Ubuntu package) - update to 6.8.0-1006.6+1
linux-image-oem-24.04a (Ubuntu package) - update to 6.8.0-1006.6+1
linux-image-6.8.0-1008-azure (Ubuntu package) - update to 6.8.0-1008.8
linux-image-6.8.0-1008-azure-fde (Ubuntu package) - update to 6.8.0-1008.8
linux-image-azure (Ubuntu package) - update to 6.8.0-1008.8
linux-image-azure-fde (Ubuntu package) - update to 6.8.0-1008.8
kernel-headers - update to 6.8.3-200.fc39
kernel - update to 6.8.3-200.fc39

• https://git.kernel.org/stable/c/5b4cdd9c5676559b8a7c944ac5269b914b8c0bb8
• https://git.kernel.org/stable/c/a88649b49523e8cbe95254440d803e38c19d2341
• https://git.kernel.org/stable/c/0200dd7ed2335469955d7e69cc1a6fa7df1f3847
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.8.3

• Denial of service in Linux kernel posix clock
• Fedora 39 update for kernel, kernel-headers
• Ubuntu update for linux
• Ubuntu update for linux-oem-6.8
• Ubuntu update for linux-azure
• Ubuntu update for linux-oracle