Process crash via ELF symbol offset wrap
Published Apr 7, 2025 · Updated Feb 25, 2026
Heap buffer overflow in bpf_object__init_prog in libbpf 1.5.0 allows local users to crash a process via a crafted BPF ELF file. A large unsigned symbol offset can wrap before the section data, while the function checks only the computed program end before copying instructions with memcpy. Exploitation requires a privileged libbpf consumer to accept an untrusted ELF file, and the record is disputed because upstream and Ubuntu report no security-boundary crossing.
Summary
What happened
Heap buffer overflow in bpf_object__init_prog in libbpf 1.5.0 allows local users to crash a process via a crafted BPF ELF file. A large unsigned symbol offset can wrap before the section data, while the function checks only the computed program end before copying instructions with memcpy. Exploitation requires a privileged libbpf consumer to accept an untrusted ELF file, and the record is disputed because upstream and Ubuntu report no security-boundary crossing.
The record
- CVE
- CVE-2025-29481
- Published
- Apr 7, 2025
- Updated
- Feb 25, 2026
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-120
- Attack vector
- local
- Privileges
- Unavailable
Timeline
How it unfolded
- Apr 7, 2025CVE publishedPublication date reported by the CVE source.
- Feb 25, 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?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
- libbpf malformed BPF ELF proof of conceptproof of concept · demonstrated
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Technologies
Your stack
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Your stack
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