#VU94227 Use-after-free in Linux kernel - CVE-2024-40899

Vulnerability identifier: #VU94227

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-2024-40899

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 cachefiles_req_put(), cachefiles_ondemand_daemon_read() and cachefiles_ondemand_send_req() functions in fs/cachefiles/ondemand.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/99e9c5bd27ddefa0f9db88625bf5e31c1e833d62
https://git.kernel.org/stable/c/a6de82765e12fb1201ab607f0d3ffe3309b30fc0
https://git.kernel.org/stable/c/1d902d9a3aa4f2a8bda698294e34be788be012fc
https://git.kernel.org/stable/c/de3e26f9e5b76fc628077578c001c4a51bf54d06

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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.