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

Summary

CVE	CVE-2024-0582
State	PUBLISHED
Assigner	redhat
Source Priority	CVE Program / NVD first with legacy fallback
Published	2024-01-16 15:15:09 UTC
Updated	2026-11-04 21:17:30 UTC
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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

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

EPSS: 0.128360000 probability, percentile 0.963040000 (date 2026-11-04)

Problem Types: CWE-416 | CWE-416 Use After Free

Version	Source	Type	Score	Severity	Vector
3.1	[email protected]	Primary	7.8	HIGH	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
3.1	[email protected]	Secondary	7.8	HIGH	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`
3.1	CNA	CVSS	7.8	HIGH	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H`

CVSS v3.1 Breakdown

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

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

NVD Known Affected Configurations (CPE 2.3)

Type	Vendor	Product	Version	Update	Edition	Language
Operating System	Linux	Linux Kernel	All	All	All	All
Operating System	Linux	Linux Kernel	6.7	rc1	All	All
Operating System	Linux	Linux Kernel	6.7	rc2	All	All
Operating System	Linux	Linux Kernel	6.7	rc3	All	All

Vendor Declared Affected Products

Source	Vendor	Product	Version	Platforms
CNA	Red Hat	Red Hat Enterprise Linux 6	Not specified	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 7	Not specified	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 7	Not specified	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8	Not specified	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 8	Not specified	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 9	Not specified	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 9	Not specified	Not specified

References

Reference	Source	Link	Tags
io_uring/kbuf: defer release of mapped buffer rings - kernel/git/torvalds/linux.git - Linux kernel source tree	af854a3a-2127-422b-91ae-364da2661108	git.kernel.org	Mailing List, Patch
www.openwall.com/lists/oss-security/2024/04/24/3	af854a3a-2127-422b-91ae-364da2661108	www.openwall.com
2254050 – (CVE-2024-0582) CVE-2024-0582 kernel: io_uring: page use-after-free vulnerability via buffer ring mmap	af854a3a-2127-422b-91ae-364da2661108	bugzilla.redhat.com	Issue Tracking, Patch, Third Party Advisory
2504 - project-zero - Project Zero - Monorail	af854a3a-2127-422b-91ae-364da2661108	bugs.chromium.org	Issue Tracking, Mailing List
cve-details	af854a3a-2127-422b-91ae-364da2661108	access.redhat.com	Third Party Advisory
CVE Program record	CVE.ORG	www.cve.org	canonical
NVD vulnerability detail	NVD	nvd.nist.gov	canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Red Hat would like to thank Jann Horn (Google Project Zero) for reporting this issue. (en)

Additional Advisory Data

Source	Time	Event
CNA	2023-11-28T00:00:00.000Z	Reported to Red Hat.
CNA	2024-01-08T00:00:00.000Z	Made public.

Workarounds

CNA: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

Legacy QID Mappings

200132 Ubuntu Security Notification for Linux kernel (Azure) Vulnerabilities (USN-6652-1)
200134 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6651-1)
200150 Ubuntu Security Notification for Linux kernel Vulnerabilities (USN-6651-2)
200157 Ubuntu Security Notification for Linux kernel (StarFive) Vulnerabilities (USN-6651-3)