#VU104425 Use-after-free in Linux kernel - CVE-2022-49501

Vulnerability identifier: #VU104425

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-2022-49501

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 smsc95xx_start_phy() function in drivers/net/usb/smsc95xx.c, within the ax88772_stop() function in drivers/net/usb/asix_devices.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/6d5deb242874d924beccf7eb3cef04c1c3b0da79
https://git.kernel.org/stable/c/969a1b3ea3cb7d58a16fe12fd1b04bfc0ea40509
https://git.kernel.org/stable/c/d1408f6b4dd78fb1b9e26bcf64477984e5f85409
https://git.kernel.org/stable/c/fbda837107f9bd4ec658d2aa88c6856dba606f06

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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.