Kernel: potential deadlock on &net->sctp.addr_wq_lock leading to dos

Summary

CVE	CVE-2024-0639
State	PUBLISHED
Assigner	redhat
Source Priority	CVE Program / NVD first with legacy fallback
Published	2024-01-17 16:15:46 UTC
Updated	2026-07-21 19:17:08 UTC
Description	A denial of service vulnerability due to a deadlock was found in sctp_auto_asconf_init in net/sctp/socket.c in the Linux kernel’s SCTP subsystem. This flaw allows guests with local user privileges to trigger a deadlock and potentially crash the system.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

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

EPSS: 0.001610000 probability, percentile 0.056990000 (date 2026-07-21)

Problem Types: CWE-833 | CWE-667 | CWE-833 Deadlock

Version	Source	Type	Score	Severity	Vector
3.1	[email protected]	Primary	5.5	MEDIUM	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`
3.1	[email protected]	Secondary	5.5	MEDIUM	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`
3.1	CNA	CVSS	5.5	MEDIUM	`CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H`

CVSS v3.1 Breakdown

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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	Redhat	Enterprise Linux	8.0	All	All	All
Operating System	Redhat	Enterprise Linux	9.0	All	All	All

Vendor Declared Affected Products

Source	Vendor	Product	Version	Platforms
CNA	Red Hat	Red Hat Enterprise Linux 9	unaffected 0:5.14.0-362.8.1.el9_3 * rpm	Not specified
CNA	Red Hat	Red Hat Enterprise Linux 9	unaffected 0:5.14.0-362.8.1.el9_3 * rpm	Not specified
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

References

Reference	Source	Link	Tags
access.redhat.com/errata/RHSA-2023:6583	[email protected]	access.redhat.com
2258754 – (CVE-2024-0639) CVE-2024-0639 kernel: potential deadlock on &net->sctp.addr_wq_lock leading to DOS	af854a3a-2127-422b-91ae-364da2661108	bugzilla.redhat.com	Issue Tracking, Patch
sctp: fix potential deadlock on &net->sctp.addr_wq_lock · torvalds/linux@6feb37b · GitHub	af854a3a-2127-422b-91ae-364da2661108	github.com	Patch
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

No vendor comments have been submitted for this CVE.

Additional Advisory Data

Source	Time	Event
CNA	2023-12-08T00:00:00.000Z	Reported to Red Hat.
CNA	2023-06-27T00:00:00.000Z	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

673723 EulerOS Security Update for kernel (EulerOS-SA-2024-1237)
673992 EulerOS Security Update for kernel (EulerOS-SA-2024-1215)
674156 EulerOS Security Update for kernel (EulerOS-SA-2024-1509)
674158 EulerOS Security Update for kernel (EulerOS-SA-2024-1488)
907997 Common Base Linux Mariner (CBL-Mariner) Security Update for kernel (33889-1)