#VU102395 Use-after-free in Linux kernel - CVE-2024-56764

Vulnerability identifier: #VU102395

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-2024-56764

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 ublk_unquiesce_dev(), ublk_stop_dev() and ublk_ctrl_start_dev() functions in drivers/block/ublk_drv.c. A local user can escalate privileges on the system.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 6.12, 6.12.1, 6.12.2, 6.12.3, 6.12.4, 6.12.5, 6.12.6, 6.12.7

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External links
https://git.kernel.org/stable/c/75cd4005da5492129917a4a4ee45e81660556104
https://git.kernel.org/stable/c/7d680f2f76a3417fdfc3946da7471e81464f7b41
https://mirrors.edge.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.8

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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.