CVE-2022-2991: linux linux_kernel Heap-based Buffer Overflow

Vulnerability summary

CVE-2022-2991 is a medium (CVSS 6.7) Heap-based Buffer Overflow vulnerability in linux linux_kernel. EPSS estimates a 0.45% chance of exploitation in the next 30 days, higher than 38.1% of scored vulnerabilities.

Timeline

1. 25-08-2022
   PublishedVulnerability first disclosed.
2. 03-08-2024
   Last modifiedVulnerability information updated.

Description

A heap-based buffer overflow was found in the Linux kernel's LightNVM subsystem. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length heap-based buffer. This vulnerability allows a local attacker to escalate privileges and execute arbitrary code in the context of the kernel. The attacker must first obtain the ability to execute high-privileged code on the target system to exploit this vulnerability.

• CWE-122Heap-based Buffer OverflowA heap overflow condition is a buffer overflow, where the buffer that can be overwritten is allocated in the heap portion of memory, generally meaning that the buffer was allocated using a routine such as malloc().
• CWE-787Out-of-bounds WriteThe product writes data past the end, or before the beginning, of the intended buffer.