NULL pointer dereference in Linux kernel - CVE-2023-22997

Vulnerability identifier: #VU75324

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-2023-22997

CWE-ID: CWE-476

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 a NULL pointer dereference error in kernel/module/decompress.c in Linux kernel. A local user can perform a denial of service (DoS) attack.

Linux kernel
Ubuntu
linux-image-virtual (Ubuntu package)
linux-image-generic-64k (Ubuntu package)
linux-image-generic (Ubuntu package)
linux-image-generic-lpae (Ubuntu package)
linux-image-5.19.0-40-generic-lpae (Ubuntu package)
linux-image-5.19.0-40-generic-64k (Ubuntu package)
linux-image-5.19.0-40-generic (Ubuntu package)
linux-image-generic-lpae-hwe-22.04 (Ubuntu package)
linux-image-generic-hwe-22.04 (Ubuntu package)
linux-image-generic-64k-hwe-22.04 (Ubuntu package)
linux-image-virtual-hwe-22.04 (Ubuntu package)
linux-image-raspi-nolpae (Ubuntu package)
linux-image-raspi (Ubuntu package)
linux-image-5.19.0-1016-raspi-nolpae (Ubuntu package)
linux-image-5.19.0-1016-raspi (Ubuntu package)
linux-image-gcp (Ubuntu package)
linux-image-oracle (Ubuntu package)
linux-image-5.19.0-1020-gcp (Ubuntu package)
linux-image-5.19.0-1020-oracle (Ubuntu package)
linux-image-kvm (Ubuntu package)
linux-image-5.19.0-1021-kvm (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-lowlatency-64k (Ubuntu package)
linux-image-5.19.0-1022-lowlatency (Ubuntu package)
linux-image-5.19.0-1022-lowlatency-64k (Ubuntu package)
linux-image-azure (Ubuntu package)
linux-image-aws (Ubuntu package)
linux-image-5.19.0-1023-aws (Ubuntu package)
linux-image-5.19.0-1023-azure (Ubuntu package)

Install updates from vendor's website.

Linux kernel - update to 6.1.2
linux-image-virtual (Ubuntu package) - update to 5.19.0.40.36
linux-image-generic-64k (Ubuntu package) - update to 5.19.0.40.36
linux-image-generic (Ubuntu package) - update to 5.19.0.40.36
linux-image-generic-lpae (Ubuntu package) - update to 5.19.0.40.36
linux-image-5.19.0-40-generic-lpae (Ubuntu package) - update to 5.19.0-40.41~22.04.1
linux-image-5.19.0-40-generic-64k (Ubuntu package) - update to 5.19.0-40.41~22.04.1
linux-image-5.19.0-40-generic (Ubuntu package) - update to 5.19.0-40.41~22.04.1
linux-image-generic-lpae-hwe-22.04 (Ubuntu package) - update to 5.19.0.40.41~22.04.13
linux-image-generic-hwe-22.04 (Ubuntu package) - update to 5.19.0.40.41~22.04.13
linux-image-generic-64k-hwe-22.04 (Ubuntu package) - update to 5.19.0.40.41~22.04.13
linux-image-virtual-hwe-22.04 (Ubuntu package) - update to 5.19.0.40.41~22.04.13
linux-image-raspi-nolpae (Ubuntu package) - update to 5.19.0.1016.15
linux-image-raspi (Ubuntu package) - update to 5.19.0.1016.15
linux-image-5.19.0-1016-raspi-nolpae (Ubuntu package) - update to 5.19.0-1016.23
linux-image-5.19.0-1016-raspi (Ubuntu package) - update to 5.19.0-1016.23
linux-image-gcp (Ubuntu package) - update to 5.19.0.1020.17
linux-image-oracle (Ubuntu package) - update to 5.19.0.1020.17
linux-image-5.19.0-1020-gcp (Ubuntu package) - update to 5.19.0-1020.22
linux-image-5.19.0-1020-oracle (Ubuntu package) - update to 5.19.0-1020.23
linux-image-kvm (Ubuntu package) - update to 5.19.0.1021.18
linux-image-5.19.0-1021-kvm (Ubuntu package) - update to 5.19.0-1021.22
linux-image-lowlatency (Ubuntu package) - update to 5.19.0.1022.18
linux-image-lowlatency-64k (Ubuntu package) - update to 5.19.0.1022.18
linux-image-5.19.0-1022-lowlatency (Ubuntu package) - update to 5.19.0-1022.23
linux-image-5.19.0-1022-lowlatency-64k (Ubuntu package) - update to 5.19.0-1022.23
linux-image-azure (Ubuntu package) - update to 5.19.0.1023.19
linux-image-aws (Ubuntu package) - update to 5.19.0.1023.20
linux-image-5.19.0-1023-aws (Ubuntu package) - update to 5.19.0-1023.24
linux-image-5.19.0-1023-azure (Ubuntu package) - update to 5.19.0-1023.24

• https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.1.2
• https://github.com/torvalds/linux/commit/45af1d7aae7d5520d2858f8517a1342646f015db

• Local denial of service in Linux kernel decompression module
• Ubuntu update for linux