#VU90291 Out-of-bounds read in Linux kernel - CVE-2021-47263

Vulnerability identifier: #VU90291

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-47263

CWE-ID: CWE-125

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 perform a denial of service (DoS) attack.

The vulnerability exists due to an out-of-bounds read error within the WCD_PIN_MASK() function in drivers/gpio/gpio-wcd934x.c. A local user can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: All versions

---

External links
https://git.kernel.org/stable/c/e0b518a2eb44d8a74c19e50f79a8ed393e96d634
https://git.kernel.org/stable/c/dd55331d493b7ea75c5db1f24d6822946fde2862
https://git.kernel.org/stable/c/dbec64b11c65d74f31427e2b9d5746fbf17bf840

---

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.