CVE-2024-1312

System crash via racy VMA locking

Published Feb 8, 2024 · Updated Aug 1, 2024

Use-after-free in the Linux kernel before 6.5-rc4 allows local users to crash the system by racing virtual-memory-area operations. The lock_vma_under_rcu function tests vma->anon_vma before taking the VMA lock, so concurrent move_vma and unlink_anon_vmas operations can detach it and leave the page-fault path using freed memory. Successful exploitation requires a local user to win two races; the bounded consequence is a kernel crash and service interruption.

CVSS severity5.1
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel before 6.5-rc4 allows local users to crash the system by racing virtual-memory-area operations. The lock_vma_under_rcu function tests vma->anon_vma before taking the VMA lock, so concurrent move_vma and unlink_anon_vmas operations can detach it and leave the page-fault path using freed memory. Successful exploitation requires a local user to win two races; the bounded consequence is a kernel crash and service interruption.

The record

CVE
CVE-2024-1312
Published
Feb 8, 2024
Updated
Aug 1, 2024
Vendor
Fedora Project
Product
Fedora Linux
Classifications
CWE-416, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 8, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Fedora Project · Fedora LinuxAffected versions are unavailable in this record.
The Linux Kernel Organization · Linux KernelAffected versions are unavailable in this record.

Published CVSS scores

4.7NIST NVDCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
5.1Red HatCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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