#VU91309 Buffer overflow in Linux kernel - CVE-2021-47347

Vulnerability identifier: #VU91309

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-2021-47347

CWE-ID: CWE-119

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 memory corruption within the wl1251_cmd_scan() function in drivers/net/wireless/ti/wl1251/cmd.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/57ad99ae3c6738ba87bad259bb57c641ca68ebf6
https://git.kernel.org/stable/c/d3d8b9c9c7843dce31e284927d4c9904fd5a510a
https://git.kernel.org/stable/c/0f6c0488368c9ac1aa685821916fadba32f5d1ef
https://git.kernel.org/stable/c/115103f6e3f1c26c473766c16439c7c8b235529a
https://git.kernel.org/stable/c/d71dddeb5380613f9ef199f3e7368fd78fb1a46e
https://git.kernel.org/stable/c/c5e4a10d7bd5d4f419d8b9705dff60cf69b302a1
https://git.kernel.org/stable/c/302e2ee34c5f7c5d805b7f835d9a6f2b43474e2a
https://git.kernel.org/stable/c/40af3960a15339e8bbd3be50c3bc7b35e1a0b6ea
https://git.kernel.org/stable/c/d10a87a3535cce2b890897914f5d0d83df669c63

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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.