Vulnerability identifier: #VU91601

Vulnerability risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2024-0562

CWE-ID: CWE-416

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the Linux Kernel. When a disk is removed, bdi_unregister is called to stop further write-back and waits for associated delayed work to complete. However, wb_inode_writeback_end() may schedule bandwidth estimation work after this has completed, which can result in the timer attempting to access the recently freed bdi_writeback. A local user can execute arbitrary code with elevated privileges.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel:

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External links
http://access.redhat.com/security/cve/CVE-2024-0562
http://bugzilla.redhat.com/show_bug.cgi?id=2258475
http://patchwork.kernel.org/project/linux-mm/patch/20220801155034.3772543-1-khazhy@google.com/
http://access.redhat.com/errata/RHSA-2024:0412

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.