Information disclosure via zero decompression match offsets
Published Dec 12, 2025 · Updated Dec 12, 2025
Information disclosure in Airlift Aircompressor before 3.4 allows remote attackers to read reused output-buffer data via malformed input. SnappyRawDecompressor and Lz4RawDecompressor accept a zero match offset, causing copy operations to take preexisting bytes from the destination buffer instead of rejecting malformed input. Exposure requires a consuming application to process attacker-controlled Snappy or LZ4 data while reusing an uncleared output buffer, which discloses prior buffer contents without altering them.
Summary
What happened
Information disclosure in Airlift Aircompressor before 3.4 allows remote attackers to read reused output-buffer data via malformed input. SnappyRawDecompressor and Lz4RawDecompressor accept a zero match offset, causing copy operations to take preexisting bytes from the destination buffer instead of rejecting malformed input. Exposure requires a consuming application to process attacker-controlled Snappy or LZ4 data while reusing an uncleared output buffer, which discloses prior buffer contents without altering them.
The record
- CVE
- CVE-2025-67721
- Published
- Dec 12, 2025
- Updated
- Dec 12, 2025
- Vendor
- Airlift
- Product
- Aircompressor
- Classifications
- CWE-201, CWE-125, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Dec 12, 2025CVE publishedPublication date reported by the CVE source.
- Dec 12, 2025Record 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=< 3.4
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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