System crash via MSG_PEEK shared-buffer mutation
Published Jan 15, 2025 · Updated Aug 5, 2026
Improper shared-buffer handling in affected Linux kernel releases allows local users to crash the system through packet-socket MSG_PEEK reads. The af_packet vlan_get_tci function mutates an skb while extracting a VLAN tag even though MSG_PEEK can expose that shared buffer to concurrent readers, leading skb_push to detect an underflow and panic. Reachability requires local low-privileged access to the packet-socket path, and successful triggering interrupts the entire operating system.
Summary
What happened
Improper shared-buffer handling in affected Linux kernel releases allows local users to crash the system through packet-socket MSG_PEEK reads. The af_packet vlan_get_tci function mutates an skb while extracting a VLAN tag even though MSG_PEEK can expose that shared buffer to concurrent readers, leading skb_push to detect an underflow and panic. Reachability requires local low-privileged access to the packet-socket path, and successful triggering interrupts the entire operating system.
The record
- CVE
- CVE-2024-57902
- Published
- Jan 15, 2025
- Updated
- Aug 5, 2026
- Vendor
- Siemens
- Product
- SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
- Classifications
- 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
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Is a vulnerable build present?
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- Affected versionversion=0 <*
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What is affected?
Published CVSS scores
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Attacks
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Technologies
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Your stack
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