CVE-2026-93049
kernel: mtd: mtdswap: Avoid freeing registered blktrans device twice
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 17, 2026
Updated · October 20, 2026
Description
A flaw was found in the Linux kernel's mtdswap module. A double free vulnerability exists in the mtdswap_add_mtd() function, where a debugfs setup failure after successful blktrans registration can cause a device to be freed twice. This memory corruption issue could potentially allow a local attacker to cause a denial of service or escalate privileges.
CVSS score applicability
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
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-763 · Release of Invalid Pointer or Reference