#VU70628 Out-of-bounds write in Linux kernel - CVE-2022-47521

Vulnerability identifier: #VU70628

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-2022-47521

CWE-ID: CWE-787

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 boundary error within the IEEE80211_P2P_ATTR_CHANNEL_LIST in drivers/net/wireless/microchip/wilc1000/cfg80211.c in the WILC1000 wireless driver. A local user trigger a heap-based buffer overflow when parsing the operating channel attribute from Wi-Fi management frames and execute arbitrary code with elevated privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Linux kernel: before 6.0.11, 6.0.11

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External links
https://github.com/torvalds/linux/commit/f9b62f9843c7b0afdaecabbcebf1dbba18599408
https://lore.kernel.org/r/20221123153543.8568-4-philipturnbull@github.com
https://lists.debian.org/debian-lts-announce/2022/12/msg00031.html

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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.