Untrusted Pointer Dereference in NvmExpressDxe - CVE-2021-41838
Published: February 3, 2022
Vulnerability identifier: #VU60275
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-41838
CWE-ID: CWE-822
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to escalate privileges on the system.
The vulnerability exists due to untrusted pointer dereference error in SMM (System Management Mode) branch that registers a SWSMI handler. A remote attacker can use this unsafe pointer "ptr" to read or write or manipulate data in the SMRAM
Affected software
NvmExpressDxe
How to mitigate CVE-2021-41838
Install updates from vendor's website.
NvmExpressDxe - addressed in versions 5.1: 05.16.42, 5.2: 05.26.42, 5.3: 05.35.42, 5.4: 05.43.42, 5.5: 05.51.42