Log in Start free

Vulnerability · Published Jan 11, 2024 · Assigned by redhat

CVE-2024-0443Kernel: blkio memory leakage due to blkcg and some blkgs are not freed after they are made offline.

Medium 5.5

In plain English

A medium-severity security flaw in kernel. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.2%top 83.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

A flaw was found in the blkgs destruction path in block/blk-cgroup.c in the Linux kernel, leading to a cgroup blkio memory leakage problem. When a cgroup is being destroyed, cgroup_rstat_flush() is only called at css_release_work_fn(), which is called when the blkcg reference count reaches 0. This circular dependency will prevent blkcg and some blkgs from being freed after they are made offline. This issue may allow an attacker with a local access to cause system instability, such as an out of memory error.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:13linux6.3.11-1DEBIAN-CVE-2024-0443
Debian:14linux6.3.11-1DEBIAN-CVE-2024-0443
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2024-0443
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2024-0443
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2024-0443
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2024-0443
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2024-0443
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2024-0443
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2024-0443
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2024-0443
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2024-0443
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2024-0443
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2024-0443
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2024-0443
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2024-0443
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2024-0443
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2024-0443
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2024-0443
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2024-0443
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2024-0443
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2024-0443
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2024-0443

Affected products (as reported)

VendorProductVersions
kernel 0 – before 6.4-rc7
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support see references
Red Hat Red Hat Enterprise Linux 6 see references
Red Hat Red Hat Enterprise Linux 7 see references
Red Hat Red Hat Enterprise Linux 7 see references
Red Hat Red Hat Enterprise Linux 8 see references
Red Hat Red Hat Enterprise Linux 9 see references
Red Hat Red Hat Enterprise Linux 9 see references

Weakness: CWE-402 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

References