Local kernel crash via MSG_PEEK buffer mutation
Published Jan 15, 2025 · Updated Aug 5, 2026
Denial of service in the Linux kernel af_packet component allows local users to crash the host through MSG_PEEK packet reads. vlan_get_protocol_dgram() modifies the shared socket buffer while inspecting a datagram, although MSG_PEEK must leave the buffer untouched, so concurrent reads can drive skb_push() before the buffer head and trigger the kernel BUG. Exploitation requires low-privileged local access and interrupts availability by crashing the running kernel.
Summary
What happened
Denial of service in the Linux kernel af_packet component allows local users to crash the host through MSG_PEEK packet reads. vlan_get_protocol_dgram() modifies the shared socket buffer while inspecting a datagram, although MSG_PEEK must leave the buffer untouched, so concurrent reads can drive skb_push() before the buffer head and trigger the kernel BUG. Exploitation requires low-privileged local access and interrupts availability by crashing the running kernel.
The record
- CVE
- CVE-2024-57901
- Published
- Jan 15, 2025
- Updated
- Aug 5, 2026
- Vendor
- Siemens
- Product
- SIPLUS S7-1500 CPU 1518-4 PN/DP MFP
- Classifications
- CWE-664, T1499.004
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jan 15, 2025CVE publishedPublication date reported by the CVE source.
- Aug 5, 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=V3.1.0 <V3.1.5
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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