Use-after-free in Linux kernel - CVE-2026-53300
Published: June 29, 2026
Vulnerability identifier: #VU135735
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-53300
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vendor: Linux Foundation
Affected software:
Linux kernel
Linux kernel
Detailed vulnerability description
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to a use-after-free in the enetc NTMP command handling path when processing timed-out NTMP commands and reclaiming DMA buffers. A local user can trigger a command timeout and concurrent buffer reuse to execute arbitrary code.
The issue can result in silent memory corruption because hardware may later perform a DMA write to the physical address of a freed buffer.
How to mitigate CVE-2026-53300
Install security update from vendor's repository.