Out-of-bounds read in Linux kernel - CVE-2023-6560

Vulnerability identifier: #VU84040

CSH Severity: Low

CVSS v4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2023-6560

CWE-ID: CWE-125

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 boundary condition in io_uring SQ/CQ rings functionality in the Linux kernel. A local user can trigger an out-of-bounds read error and perform a denial of service (DoS) attack.

Linux kernel
Ubuntu
Fedora
linux-image-virtual (Ubuntu package)
linux-image-kvm (Ubuntu package)
linux-image-generic-lpae (Ubuntu package)
linux-image-generic-64k (Ubuntu package)
linux-image-generic (Ubuntu package)
linux-image-6.5.0-25-generic-64k (Ubuntu package)
linux-image-6.5.0-25-generic (Ubuntu package)
linux-image-6.5.0-25-lowlatency-64k (Ubuntu package)
linux-image-6.5.0-25-lowlatency (Ubuntu package)
linux-image-lowlatency-64k-hwe-22.04 (Ubuntu package)
linux-image-lowlatency-hwe-22.04 (Ubuntu package)
linux-image-lowlatency-64k (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-generic-hwe-22.04 (Ubuntu package)
linux-image-virtual-hwe-22.04 (Ubuntu package)
linux-image-generic-64k-hwe-22.04 (Ubuntu package)
linux-image-6.5.0-1009-starfive (Ubuntu package)
linux-image-starfive (Ubuntu package)
linux-image-6.5.0-1011-laptop (Ubuntu package)
linux-image-laptop-23.10 (Ubuntu package)
linux-image-raspi (Ubuntu package)
linux-image-raspi-nolpae (Ubuntu package)
linux-image-6.5.0-1012-raspi (Ubuntu package)
linux-image-6.5.0-1015-aws (Ubuntu package)
linux-image-aws (Ubuntu package)
linux-image-6.5.0-1015-gcp (Ubuntu package)
linux-image-gcp (Ubuntu package)
linux-image-6.5.0-1016-azure (Ubuntu package)
linux-image-6.5.0-1016-azure-fde (Ubuntu package)
linux-image-azure (Ubuntu package)
linux-image-azure-fde (Ubuntu package)
linux-image-6.5.0-1016-oem (Ubuntu package)
linux-image-oem-22.04d (Ubuntu package)
linux-image-6.5.0-1018-oracle-64k (Ubuntu package)
linux-image-6.5.0-1018-oracle (Ubuntu package)
linux-image-oracle-64k (Ubuntu package)
linux-image-oracle (Ubuntu package)
kernel

Install updates from vendor's website.

linux-image-virtual (Ubuntu package) - update to 6.5.0.25.25
linux-image-kvm (Ubuntu package) - update to 6.5.0.25.25
linux-image-generic-lpae (Ubuntu package) - update to 6.5.0.25.25
linux-image-generic-64k (Ubuntu package) - update to 6.5.0.25.25
linux-image-generic (Ubuntu package) - update to 6.5.0.25.25
linux-image-6.5.0-25-generic-64k (Ubuntu package) - addressed in versions 6.5.0-25.25, 6.5.0-25.25~22.04.1
linux-image-6.5.0-25-generic (Ubuntu package) - addressed in versions 6.5.0-25.25, 6.5.0-25.25~22.04.1
linux-image-6.5.0-25-lowlatency-64k (Ubuntu package) - update to 6.5.0-25.25.1~22.04.1
linux-image-6.5.0-25-lowlatency (Ubuntu package) - update to 6.5.0-25.25.1~22.04.1
linux-image-lowlatency-64k-hwe-22.04 (Ubuntu package) - update to 6.5.0.25.25.1~22.04.8
linux-image-lowlatency-hwe-22.04 (Ubuntu package) - update to 6.5.0.25.25.1~22.04.8
linux-image-lowlatency-64k (Ubuntu package) - update to 6.5.0.25.25.16
linux-image-lowlatency (Ubuntu package) - update to 6.5.0.25.25.16
linux-image-generic-hwe-22.04 (Ubuntu package) - update to 6.5.0.25.25~22.04.12
linux-image-virtual-hwe-22.04 (Ubuntu package) - update to 6.5.0.25.25~22.04.12
linux-image-generic-64k-hwe-22.04 (Ubuntu package) - update to 6.5.0.25.25~22.04.12
linux-image-6.5.0-1009-starfive (Ubuntu package) - update to 6.5.0-1009.10~22.04.1
linux-image-starfive (Ubuntu package) - addressed in versions 6.5.0.1009.10~22.04.4, 6.5.0.1009.11
linux-image-6.5.0-1011-laptop (Ubuntu package) - update to 6.5.0-1011.14
linux-image-laptop-23.10 (Ubuntu package) - update to 6.5.0.1011.14
linux-image-raspi (Ubuntu package) - update to 6.5.0.1012.13
linux-image-raspi-nolpae (Ubuntu package) - update to 6.5.0.1012.13
linux-image-6.5.0-1012-raspi (Ubuntu package) - update to 6.5.0-1012.15
linux-image-6.5.0-1015-aws (Ubuntu package) - addressed in versions 6.5.0-1015.15, 6.5.0-1015.15~22.04.1
linux-image-aws (Ubuntu package) - addressed in versions 6.5.0.1015.15, 6.5.0.1015.15~22.04.1
linux-image-6.5.0-1015-gcp (Ubuntu package) - update to 6.5.0-1015.15~22.04.1
linux-image-gcp (Ubuntu package) - update to 6.5.0.1015.15~22.04.1
linux-image-6.5.0-1016-azure (Ubuntu package) - addressed in versions 6.5.0-1016.16, 6.5.0-1016.16~22.04.1
linux-image-6.5.0-1016-azure-fde (Ubuntu package) - addressed in versions 6.5.0-1016.16, 6.5.0-1016.16~22.04.1
linux-image-azure (Ubuntu package) - addressed in versions 6.5.0.1016.16~22.04.1, 6.5.0.1016.18
linux-image-azure-fde (Ubuntu package) - addressed in versions 6.5.0.1016.16~22.04.1, 6.5.0.1016.18
linux-image-6.5.0-1016-oem (Ubuntu package) - update to 6.5.0-1016.17
linux-image-oem-22.04d (Ubuntu package) - update to 6.5.0.1016.18
linux-image-6.5.0-1018-oracle-64k (Ubuntu package) - update to 6.5.0-1018.18
linux-image-6.5.0-1018-oracle (Ubuntu package) - update to 6.5.0-1018.18
linux-image-oracle-64k (Ubuntu package) - update to 6.5.0.1018.20
linux-image-oracle (Ubuntu package) - update to 6.5.0.1018.20
kernel - addressed in versions 6.6.5-100.fc38, 6.6.5-200.fc39, 6.6.6-100.fc38, 6.6.6-200.fc39

• https://access.redhat.com/security/cve/CVE-2023-6560
• https://bugzilla.redhat.com/show_bug.cgi?id=2253249
• https://patchwork.kernel.org/project/io-uring/patch/20231130194633.649319-2-axboe@kernel.dk/

• Local denial of service in Linux kernel io_uring
• Fedora 39 update for kernel
• Fedora 38 update for kernel
• Fedora 39 update for kernel
• Fedora 38 update for kernel
• Ubuntu update for linux
• Ubuntu update for linux-azure
• Ubuntu update for linux-aws