Medium 6.3Published Dec 12, 2025

CVE-2025-67721Aircompressor's Snappy and LZ4 Java-based decompressor implementation can leak information from reused output buffer

Updated under an hour ago (Oct 27, 2026, 4:10 PM ET)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for airlift aircompressor

Exploited in the last 30 days

Aircompressor is a library with ports of the Snappy, LZO, LZ4, and Zstandard compression algorithms to Java. In versions 3.3 and below, incorrect handling of malformed data in Java-based decompressor implementations for Snappy and LZ4 allow remote attackers to read previous buffer contents via crafted compressed input. With certain crafted compressed inputs, elements from the output buffer can end up in the uncompressed output, potentially leaking sensitive data. This is relevant for applications that reuse the same output buffer to uncompress multiple inputs. This can be the case of a web server that allocates a fix-sized buffer for performance purposes. There is similar vulnerability in GHSA-cmp6-m4wj-q63q. This issue is fixed in version 3.4.

CVSS: 6.3 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
Weakness (CWE): CWE-201, CWE-125
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Dec 15, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

airlift aircompressor airlift:aircompressor (from the name)	before 3.4	CNA record
airlift aircompressor airlift:aircompressor	before 2.0.3; from 3.0 before 3.4	NVD

References

References

https://github.com/airlift/aircompressor/security/advisories/GHSA-vx9q-rhv9-3jvg	x-refsource-confirm, mitigation, vendor-advisory
https://github.com/airlift/aircompressor/commit/f2b489b398779b40c1ee29ddb11d7edef54ddc15	x-refsource-misc, patch
https://github.com/airlift/aircompressor/commit/ff12c4d5757c9d6d1de3d39a10402f1f84f9b765	x-refsource-misc, patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.