Kernel crash via IP_HDRINCL raw-socket race
Published May 30, 2024 · Updated Sep 8, 2026
Improper input validation in the Linux IPv4 raw-socket path allows local users to crash affected kernels through an IP_HDRINCL race. The __ip_make_skb function reads an absent ICMP header when concurrent setsockopt calls change IP_HDRINCL, while raw_sendmsg leaves ICMP type and code fields uninitialized. Triggering requires local low-privileged access and carefully timed raw IPv4 socket operations; the bounded consequence is a kernel crash and service interruption.
Summary
What happened
Improper input validation in the Linux IPv4 raw-socket path allows local users to crash affected kernels through an IP_HDRINCL race. The __ip_make_skb function reads an absent ICMP header when concurrent setsockopt calls change IP_HDRINCL, while raw_sendmsg leaves ICMP type and code fields uninitialized. Triggering requires local low-privileged access and carefully timed raw IPv4 socket operations; the bounded consequence is a kernel crash and service interruption.
The record
- CVE
- CVE-2024-36927
- Published
- May 30, 2024
- Updated
- Sep 8, 2026
- Vendor
- Siemens
- Product
- SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
- Classifications
- CWE-20, T1499
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- May 30, 2024CVE publishedPublication date reported by the CVE source.
- Sep 8, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=V3.1.6 <*
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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Your stack
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