#VU98900 Use-after-free in Linux kernel - CVE-2024-47691

Vulnerability identifier: #VU98900

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2024-47691

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 f2fs_shutdown() function in fs/f2fs/super.c, within the f2fs_ioc_abort_atomic_write(), f2fs_do_shutdown() and f2fs_ioc_shutdown() functions in fs/f2fs/file.c. A local user can escalate privileges on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

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External links
https://git.kernel.org/stable/c/fc18e655b62ac6bc9f12f5de0d749b4a3fe1e812
https://git.kernel.org/stable/c/7c339dee7eb0f8e4cadc317c595f898ef04dae30
https://git.kernel.org/stable/c/d79343cd66343709e409d96b2abb139a0a55ce34
https://git.kernel.org/stable/c/c7f114d864ac91515bb07ac271e9824a20f5ed95

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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.