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Public proof of conceptFix available

CVE-2024-0582

Kernel: io_uring: page use-after-free vulnerability via buffer ring mmap

A public proof of concept exists; no exploitation attested.

  • Published2024-01-16
  • Fixed in6.6.5
  • WeaknessCWE-416

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A memory leak flaw was found in the Linux kernel’s io_uring functionality in how a user registers a buffer ring with IORING_REGISTER_PBUF_RING, mmap() it, and then frees it. This flaw allows a local user to crash or potentially escalate their privileges on the system.

Timeline

dates in UTC
  1. 2024-01-1614:33CVE publishedCNA
  2. 2024-01-1615:15CVE publishedNVD

Versions per branch

NVD
Linux linux kernel
BranchAffectedFixed in
6.x≥ 6.4, < 6.6.56.6.5
6.7= 6.7no fix published

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Products declared by the CNA8 products

As redhat, the CNA that assigned this CVE, declared them in the CVE record; versions as written.

2 more products in the CVE record.

Source: the CNA record (CVE Program), © The MITRE Corporation,CVE Terms of UseCVE recordupdated 2026-11-04

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • kernelAzure Linux:3all versions · no fixed version listed
  • linuxDebian:14all versions · fixed in 6.6.8-1
  • linuxDebian:13all versions · fixed in 6.6.8-1
  • linux-azureUbuntu:18.04:LTSall versions · no fixed version listedand 14 other packages
  • linux-hwe-6.5Ubuntu:22.04:LTSall versions · fixed in 6.5.0-21.21~22.04.1
  • linux-hwe-edgeUbuntu:16.04:LTSall versions · no fixed version listed
  • linux-nvidia-6.5Ubuntu:22.04:LTSall versions · fixed in 6.5.0-1014.14
  • linux-oem-6.5Ubuntu:22.04:LTSall versions · fixed in 6.5.0-1015.16

5 more package ranges on OSV.dev

Vendor advisories

  • CVE-2024-0582 Red Hat Product Security

    kernel: io_uring: page use-after-free vulnerability via buffer ring mmap

Full record on NVD

Fix

  1. Update Linux linux kernel to 6.6.5

Advisories and patches

Detection

read 2026-11-01 01:02 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
2024-01-16
Last Modified
2026-11-04
NVD status
Modified
GitHub Advisory
GHSA-vqhw-2g88-5gvm

Frequently asked questions

What is CVE-2024-0582?

A memory leak flaw was found in the Linux kernel’s io_uring functionality in how a user registers a buffer ring with IORING_REGISTER_PBUF_RING, mmap() it, and then frees it. This flaw allows a local user to crash or potentially escalate their privileges on the system.

Is CVE-2024-0582 actively exploited?

Active exploitation of CVE-2024-0582 has not been confirmed. Its EPSS score was 12.8% on 2026-11-09, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2024-0582?

CVE-2024-0582 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

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