Out-of-bounds read in Linux kernel - CVE-2024-40955

Vulnerability identifier: #VU94237

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-2024-40955

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 an out-of-bounds read error within the EXT4_ATTR_FUNC(), ext4_attr_show() and ext4_attr_store() functions in fs/ext4/sysfs.c, within the mb_avg_fragment_size_order() and ext4_mb_choose_next_group_best_avail() functions in fs/ext4/mballoc.c. A local user can perform a denial of service (DoS) attack.

Linux kernel
Ubuntu
openEuler
bpftool
kernel
python3-perf-debuginfo
python3-perf
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-source
kernel-headers
kernel-devel
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
kernel-tools
linux-image-generic (Ubuntu package)
linux-image-generic-64k (Ubuntu package)
linux-image-generic-64k-hwe-24.04 (Ubuntu package)
linux-image-6.8.0-44-generic-64k (Ubuntu package)
linux-image-6.8.0-44-generic (Ubuntu package)
linux-image-generic-hwe-24.04 (Ubuntu package)
linux-image-generic-lpae (Ubuntu package)
linux-image-kvm (Ubuntu package)
linux-image-virtual (Ubuntu package)
linux-image-virtual-hwe-24.04 (Ubuntu package)
linux-image-lowlatency (Ubuntu package)
linux-image-lowlatency-64k (Ubuntu package)
linux-image-6.8.0-44-lowlatency-64k (Ubuntu package)
linux-image-6.8.0-44-lowlatency (Ubuntu package)
linux-image-lowlatency-hwe-22.04 (Ubuntu package)
linux-image-lowlatency-64k-hwe-22.04 (Ubuntu package)
linux-image-oem-22.04b (Ubuntu package)
linux-image-oem-22.04a (Ubuntu package)
linux-image-oem-22.04 (Ubuntu package)
linux-image-generic-hwe-22.04 (Ubuntu package)
linux-image-generic-64k-hwe-22.04 (Ubuntu package)
linux-image-6.8.0-45-generic-64k (Ubuntu package)
linux-image-6.8.0-45-generic (Ubuntu package)
linux-image-oem-22.04c (Ubuntu package)
linux-image-oem-22.04d (Ubuntu package)
linux-image-virtual-hwe-22.04 (Ubuntu package)
linux-image-gke (Ubuntu package)
linux-image-6.8.0-1010-gke (Ubuntu package)
linux-image-raspi (Ubuntu package)
linux-image-6.8.0-1011-raspi (Ubuntu package)
linux-image-6.8.0-1012-ibm (Ubuntu package)
linux-image-oracle-64k (Ubuntu package)
linux-image-oracle (Ubuntu package)
linux-image-6.8.0-1012-oem (Ubuntu package)
linux-image-6.8.0-1012-oracle (Ubuntu package)
linux-image-6.8.0-1012-oracle-64k (Ubuntu package)
linux-image-ibm-lts-24.04 (Ubuntu package)
linux-image-ibm-classic (Ubuntu package)
linux-image-ibm (Ubuntu package)
linux-image-nvidia (Ubuntu package)
linux-image-nvidia-64k (Ubuntu package)
linux-image-6.8.0-1013-nvidia-64k (Ubuntu package)
linux-image-6.8.0-1013-nvidia (Ubuntu package)
linux-image-nvidia-lowlatency-64k (Ubuntu package)
linux-image-nvidia-lowlatency (Ubuntu package)
linux-image-6.8.0-1013-nvidia-lowlatency-64k (Ubuntu package)
linux-image-6.8.0-1013-nvidia-lowlatency (Ubuntu package)
linux-image-nvidia-6.8 (Ubuntu package)
linux-image-nvidia-64k-6.8 (Ubuntu package)
linux-image-azure-fde (Ubuntu package)
linux-image-azure (Ubuntu package)
linux-image-6.8.0-1014-azure-fde (Ubuntu package)
linux-image-6.8.0-1014-azure (Ubuntu package)
linux-image-gcp (Ubuntu package)
linux-image-6.8.0-1014-gcp (Ubuntu package)
linux-image-6.8.0-1015-aws (Ubuntu package)
linux-image-aws (Ubuntu package)

Install update from vendor's website.

Linux kernel - addressed in versions 6.6.36, 6.10
bpftool - update to 6.6.0-39.0.0.47
kernel - update to 6.6.0-39.0.0.47
python3-perf-debuginfo - update to 6.6.0-39.0.0.47
python3-perf - update to 6.6.0-39.0.0.47
perf-debuginfo - update to 6.6.0-39.0.0.47
perf - update to 6.6.0-39.0.0.47
kernel-tools-devel - update to 6.6.0-39.0.0.47
kernel-tools-debuginfo - update to 6.6.0-39.0.0.47
kernel-source - update to 6.6.0-39.0.0.47
kernel-headers - update to 6.6.0-39.0.0.47
kernel-devel - update to 6.6.0-39.0.0.47
kernel-debugsource - update to 6.6.0-39.0.0.47
kernel-debuginfo - update to 6.6.0-39.0.0.47
bpftool-debuginfo - update to 6.6.0-39.0.0.47
kernel-tools - update to 6.6.0-39.0.0.47
linux-image-generic (Ubuntu package) - update to 6.8.0-44.44
linux-image-generic-64k (Ubuntu package) - update to 6.8.0-44.44
linux-image-generic-64k-hwe-24.04 (Ubuntu package) - update to 6.8.0-44.44
linux-image-6.8.0-44-generic-64k (Ubuntu package) - update to 6.8.0-44.44
linux-image-6.8.0-44-generic (Ubuntu package) - update to 6.8.0-44.44
linux-image-generic-hwe-24.04 (Ubuntu package) - update to 6.8.0-44.44
linux-image-generic-lpae (Ubuntu package) - update to 6.8.0-44.44
linux-image-kvm (Ubuntu package) - update to 6.8.0-44.44
linux-image-virtual (Ubuntu package) - update to 6.8.0-44.44
linux-image-virtual-hwe-24.04 (Ubuntu package) - update to 6.8.0-44.44
linux-image-lowlatency (Ubuntu package) - update to 6.8.0-44.44.1
linux-image-lowlatency-64k (Ubuntu package) - update to 6.8.0-44.44.1
linux-image-6.8.0-44-lowlatency-64k (Ubuntu package) - addressed in versions 6.8.0-44.44.1, 6.8.0-44.44.1~22.04.1
linux-image-6.8.0-44-lowlatency (Ubuntu package) - addressed in versions 6.8.0-44.44.1, 6.8.0-44.44.1~22.04.1
linux-image-lowlatency-hwe-22.04 (Ubuntu package) - update to 6.8.0-44.44.1~22.04.1
linux-image-lowlatency-64k-hwe-22.04 (Ubuntu package) - update to 6.8.0-44.44.1~22.04.1
linux-image-oem-22.04b (Ubuntu package) - update to 6.8.0-45.45~22.04.1
linux-image-oem-22.04a (Ubuntu package) - update to 6.8.0-45.45~22.04.1
linux-image-oem-22.04 (Ubuntu package) - update to 6.8.0-45.45~22.04.1
linux-image-generic-hwe-22.04 (Ubuntu package) - update to 6.8.0-45.45~22.04.1
linux-image-generic-64k-hwe-22.04 (Ubuntu package) - update to 6.8.0-45.45~22.04.1
linux-image-6.8.0-45-generic-64k (Ubuntu package) - update to 6.8.0-45.45~22.04.1
linux-image-6.8.0-45-generic (Ubuntu package) - update to 6.8.0-45.45~22.04.1
linux-image-oem-22.04c (Ubuntu package) - update to 6.8.0-45.45~22.04.1
linux-image-oem-22.04d (Ubuntu package) - update to 6.8.0-45.45~22.04.1
linux-image-virtual-hwe-22.04 (Ubuntu package) - update to 6.8.0-45.45~22.04.1
linux-image-gke (Ubuntu package) - update to 6.8.0-1010.13
linux-image-6.8.0-1010-gke (Ubuntu package) - update to 6.8.0-1010.13
linux-image-raspi (Ubuntu package) - update to 6.8.0-1011.12
linux-image-6.8.0-1011-raspi (Ubuntu package) - update to 6.8.0-1011.12
linux-image-6.8.0-1012-ibm (Ubuntu package) - update to 6.8.0-1012.12
linux-image-oracle-64k (Ubuntu package) - update to 6.8.0-1012.12
linux-image-oracle (Ubuntu package) - update to 6.8.0-1012.12
linux-image-6.8.0-1012-oem (Ubuntu package) - update to 6.8.0-1012.12
linux-image-6.8.0-1012-oracle (Ubuntu package) - update to 6.8.0-1012.12
linux-image-6.8.0-1012-oracle-64k (Ubuntu package) - update to 6.8.0-1012.12
linux-image-ibm-lts-24.04 (Ubuntu package) - update to 6.8.0-1012.12
linux-image-ibm-classic (Ubuntu package) - update to 6.8.0-1012.12
linux-image-ibm (Ubuntu package) - update to 6.8.0-1012.12
linux-image-nvidia (Ubuntu package) - update to 6.8.0-1013.13
linux-image-nvidia-64k (Ubuntu package) - update to 6.8.0-1013.13
linux-image-6.8.0-1013-nvidia-64k (Ubuntu package) - addressed in versions 6.8.0-1013.14, 6.8.0-1013.14~22.04.1
linux-image-6.8.0-1013-nvidia (Ubuntu package) - addressed in versions 6.8.0-1013.14, 6.8.0-1013.14~22.04.1
linux-image-nvidia-lowlatency-64k (Ubuntu package) - update to 6.8.0-1013.14.1
linux-image-nvidia-lowlatency (Ubuntu package) - update to 6.8.0-1013.14.1
linux-image-6.8.0-1013-nvidia-lowlatency-64k (Ubuntu package) - update to 6.8.0-1013.14.1
linux-image-6.8.0-1013-nvidia-lowlatency (Ubuntu package) - update to 6.8.0-1013.14.1
linux-image-nvidia-6.8 (Ubuntu package) - update to 6.8.0-1013.14~22.04.1
linux-image-nvidia-64k-6.8 (Ubuntu package) - update to 6.8.0-1013.14~22.04.1
linux-image-azure-fde (Ubuntu package) - update to 6.8.0-1014.16
linux-image-azure (Ubuntu package) - update to 6.8.0-1014.16
linux-image-6.8.0-1014-azure-fde (Ubuntu package) - update to 6.8.0-1014.16
linux-image-6.8.0-1014-azure (Ubuntu package) - update to 6.8.0-1014.16
linux-image-gcp (Ubuntu package) - update to 6.8.0-1014.16
linux-image-6.8.0-1014-gcp (Ubuntu package) - update to 6.8.0-1014.16
linux-image-6.8.0-1015-aws (Ubuntu package) - update to 6.8.0-1015.16
linux-image-aws (Ubuntu package) - update to 6.8.0-1015.16

• https://git.kernel.org/stable/c/677ff4589f1501578fa903a25bb14831d0607992
• https://git.kernel.org/stable/c/b829687ae1229224262bcabf49accfa2dbf8db06
• https://git.kernel.org/stable/c/13df4d44a3aaabe61cd01d277b6ee23ead2a5206
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.10
• https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.36

• Out-of-bounds read in Linux kernel ext4
• openEuler 24.03 LTS update for kernel
• Ubuntu update for linux
• Ubuntu update for linux-nvidia
• Ubuntu update for linux-azure
• Ubuntu update for linux-lowlatency-hwe-6.8
• Ubuntu update for linux-nvidia-6.8
• Ubuntu update for linux-raspi
• Ubuntu update for linux-hwe-6.8