#VU89255 Use-after-free in Linux kernel - CVE-2023-52509

Vulnerability identifier: #VU89255

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-2023-52509

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 can escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the ravb_close() function in drivers/net/ethernet/renesas/ravb_main.c. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: All versions

---

External links
https://git.kernel.org/stable/c/65d34cfd4e347054eb4193bc95d9da7eaa72dee5
https://git.kernel.org/stable/c/db9aafa19547833240f58c2998aed7baf414dc82
https://git.kernel.org/stable/c/616761cf9df9af838c0a1a1232a69322a9eb67e6
https://git.kernel.org/stable/c/6f6fa8061f756aedb93af12a8a5d3cf659127965
https://git.kernel.org/stable/c/105abd68ad8f781985113aee2e92e0702b133705
https://git.kernel.org/stable/c/3971442870713de527684398416970cf025b4f89

---

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.