Kernel: race condition leads to use after free during vma lock in lock_vma_under_rcu

published 2024-02-08 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-17072

cvss: 5.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 13%
public exploits: 0; none known

A use-after-free flaw was found in the Linux kernel's Memory Management subsystem when a user wins two races at the same time with a fail in the mas_prev_slot function. This issue could allow a local user to crash the system.

Patch / fix

fixed in 1 distros 2 links 1

linux linux_kernel 6.5

debian azure linux

linux Debian 14, Debian 13 6.4.11-1

debian advisories DEBIAN-CVE-2024-1312

kernel CBL-Mariner 2.0 5.15.148.2-2

azure linux advisories AZL-34305

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/mm/memo… patch

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2024-1312 updated 2026-11-05 cvss 5.1

kernel: Race condition leads to use after free during VMA lock in lock_vma_under_rcu

Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: partial
Assessed: 2 y ago (2024-02-08)

Exploit prediction

0.23% chance of exploitation in the next 30 days, higher than 13% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	5.1	CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	3.1	4.7	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

n/a kernel
Red Hat Red Hat Enterprise Linux 6
Red Hat Red Hat Enterprise Linux 7
Red Hat Red Hat Enterprise Linux 8
Red Hat Red Hat Enterprise Linux 9
Fedora Fedora

Classification

Weakness

CWE-416 Use After Free

Technology feeds

Linux kernel rss critical rss

References

git.kernel.org /pub/scm/linux/kernel/git/torvalds/linux.git/commit/mm/memory.c?h=v6.8-rc3&id=657b5146955eba331e01b9a6ae89ce2e
mailing-list, patch
access.redhat.com /security/cve/CVE-2024-1312
vdb-entry, third-party-advisory
bugzilla.redhat.com /show_bug.cgi?id=2225569
issue-tracking, third-party-advisory

Sources

CVE List CVE-2024-1312
NVD CVE-2024-1312

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary