CVE intelligence and bounded remediation

CVE-2024-0639 — Linux Linux Kernel security vulnerability

Medium CVSS 5.5

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.

Severity
Medium
CVSS
5.5 (3.1)
Published
2024-01-17
CISA KEV
Not currently listed
Ecosystem
linux/kernel
Weaknesses
CWE-833, CWE-667

Affected products

  • linux / linux_kernel
  • redhat / enterprise_linux / 8.0
  • redhat / enterprise_linux / 9.0

Matched remediation archetype

Race condition, TOCTOU, and lifecycle synchronization

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Check exposure

  • Map concurrent actors, shared state, lock boundaries, signals, callbacks, retries, and check-then-use sequences in the affected path.
  • Determine whether untrusted users can influence timing, object names, filesystem state, or repeated state transitions.
  • Identify clustered and multi-process behavior that repository-local tests may not represent.

Remediate safely

  • Make the sensitive state transition atomic or protect it with a consistently ordered synchronization primitive.
  • Perform authorization and invariant checks on the same authoritative object and transaction used for the operation.
  • Use unique private resources, safe ownership transfer, and idempotent operations; add deterministic concurrency regression tests.

Authoritative sources

Complete CVE record and remediation plan

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