CVE-2022-48762

A flaw was found in the Linux kernel's ARM64 architecture support. This vulnerability allows a local user to cause a Denial of Service (DoS) by triggering a kernel crash. The issue occurs because the exception handler for unaligned memory reads incorrectly extracts register indices from exception tables. As a result, the kernel may attempt to dereference an arbitrary memory address or corrupt register values, leading to system instability or a crash.

This vulnerability is rated as having Low severity for Red Hat because exploitation is constrained to local access on 64-bit ARM architectures and results strictly in a denial of service. The issue requires specific faulting conditions during an unaligned zero-padded memory operation to trigger improper register index handling in the kernel exception table. Consequently, an attacker cannot achieve arbitrary code execution or elevate privileges, limiting the blast radius to a system crash.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.