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CVE PROGRAM SOURCE RECORD5.5 Medium

CVE-2024-0443

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

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Status
Published
Published
Updated
Assigning organization
redhat

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 products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

kernel

Default version status: unaffected

  • 0 to < 6.4-rc7affected

Red Hat Red Hat Enterprise Linux 8

Default version status: affected

  • 0:4.18.0-513.5.1.el8_9 to < *unaffected

Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support

Default version status: affected

  • 0:5.14.0-284.40.1.el9_2 to < *unaffected

Red Hat Red Hat Enterprise Linux 6

Default version status: unaffected

Red Hat Red Hat Enterprise Linux 7

Default version status: unaffected

Red Hat Red Hat Enterprise Linux 7

Default version status: unaffected

Red Hat Red Hat Enterprise Linux 8

Default version status: affected

Red Hat Red Hat Enterprise Linux 9

Default version status: affected

Red Hat Red Hat Enterprise Linux 9

Default version status: unaffected

References