CVE-2024-0639 — A denial of service vulnerability due to a deadlock was found in sctp_auto_ascon

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.

01What is this vulnerability?

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.

02Affected products

No structured affected-product list available — see references below for vendor advisories.

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2024-01-17T16:15:46.810
• Last modified: 2026-07-21T19:17:08.927

09References

• access.redhat.com — https://access.redhat.com/errata/RHSA-2023:6583
• access.redhat.com — https://access.redhat.com/security/cve/CVE-2024-0639
• bugzilla.redhat.com — https://bugzilla.redhat.com/show_bug.cgi?id=2258754
• github.com — https://github.com/torvalds/linux/commit/6feb37b3b06e9049e20dcf7e23998f92c9c5be9…
• access.redhat.com — https://access.redhat.com/security/cve/CVE-2024-0639
• bugzilla.redhat.com — https://bugzilla.redhat.com/show_bug.cgi?id=2258754
• github.com — https://github.com/torvalds/linux/commit/6feb37b3b06e9049e20dcf7e23998f92c9c5be9…