CVE-2022-50849

A flaw was found in the Linux kernel’s pstore persistent storage subsystem when using the ram backend. Under certain conditions, accessing /proc/kcore on systems with pstore ram backend could trigger a kernel oops due to improper memory access. The code assumed that pages mapped with vmap() were directly addressable through kmap_atomic(), which is not guaranteed on all configurations. This assumption could result in an invalid memory access and system fault. An unprivileged local user with access to /proc/kcore may be able to induce this condition and destabilize the kernel.

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.

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.