Advisory Details

July 11th, 2022

Linux Kernel LightNVM Subsystem Heap-based Overflow Privilege Escalation Vulnerability

CVE ID	CVE-2022-2991
CVSS SCORE	8.2, AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
AFFECTED VENDORS	Linux
AFFECTED PRODUCTS	Kernel
VULNERABILITY DETAILS	This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel. An attacker must first obtain the ability to execute high-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the 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. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel.
ADDITIONAL DETAILS	https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/drivers/lightnvm/Kconfig?h=v5.10.114&id=549209caabc89f2877ad5f62d11fca5c052e0e8 https://access.redhat.com/security/cve/CVE-2022-2991
DISCLOSURE TIMELINE	2022-04-27 - Vulnerability reported to vendor 2022-07-11 - Coordinated public release of advisory 2023-09-20 - Advisory Updated
CREDIT	Lucas Leong (@_wmliang_) of Trend Micro Zero Day Initiative

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