Service interruption via PIPAPO allocation overflow
Published Jul 3, 2025 · Updated Sep 8, 2026
Integer overflow in Linux kernel 5.6 and later unfixed branches allows local users to cause a service interruption through nftables. PIPAPO lookup-table sizing multiplies attacker-influenced field, bucket, and word dimensions without detecting wraparound, permitting an undersized allocation. Exploitation requires low-privileged local access and crafted PIPAPO set dimensions; the resulting memory corruption can crash the kernel.
Summary
What happened
Integer overflow in Linux kernel 5.6 and later unfixed branches allows local users to cause a service interruption through nftables. PIPAPO lookup-table sizing multiplies attacker-influenced field, bucket, and word dimensions without detecting wraparound, permitting an undersized allocation. Exploitation requires low-privileged local access and crafted PIPAPO set dimensions; the resulting memory corruption can crash the kernel.
The record
- CVE
- CVE-2025-38162
- Published
- Jul 3, 2025
- 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
- Jul 3, 2025CVE 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=V3.1.5 <*
- 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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