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CVE Database›Document archive›CVE-2023-1249

CVE-2023-1249

kernel: missing mmap_lock in file_files_note that could possibly lead to a use after free in the coredump code

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Severity

Low

Red Hat Product Security

4.1

CVSS 3.1

Review impact separately from score.

Published · January 31, 2022

Updated · November 21, 2025

Description

A use-after-free flaw was found in the Linux kernel’s core dump subsystem. This flaw allows a local user to crash the system. Only if patch 390031c94211 ("coredump: Use the vma snapshot in fill_files_note") not applied yet, then kernel could be affected.

Statement

This flaw is challenging to execute, as the attacker must race the vulnerable code twice. Therefore it is considered Low severity.

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 · 4.1
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

CWE-416 · Use After Free