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2 vulnerabilities found for lz4_flex by pseitz
CVE-2026-32829 (GCVE-0-2026-32829)
Vulnerability from nvd – Published: 2026-03-20 00:49 – Updated: 2026-03-21 03:03
VLAI
Title
lz4_flex: Decompression can leak information from uninitialized memory or reused output buffer
Summary
lz4_flex is a pure Rust implementation of LZ4 compression/decompression. In versions 0.11.5 and below, and 0.12.0, decompressing invalid LZ4 data can leak sensitive information from uninitialized memory or from previous decompression operations. The library fails to properly validate offset values during LZ4 "match copy operations," allowing out-of-bounds reads from the output buffer. The block-based API functions (`decompress_into`, `decompress_into_with_dict`, and others when `safe-decode` is disabled) are affected, while all frame APIs are unaffected. The impact is potential exposure of sensitive data and secrets through crafted or malformed LZ4 input. This issue has been fixed in versions 0.11.6 and 0.12.1.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/PSeitz/lz4_flex/security/advis… | x_refsource_CONFIRM |
| https://github.com/PSeitz/lz4_flex/commit/055502e… | x_refsource_MISC |
| https://rustsec.org/advisories/RUSTSEC-2026-0041.html | x_refsource_MISC |
Impacted products
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CVE-2026-32829 (GCVE-0-2026-32829)
Vulnerability from cvelistv5 – Published: 2026-03-20 00:49 – Updated: 2026-03-21 03:03
VLAI
Title
lz4_flex: Decompression can leak information from uninitialized memory or reused output buffer
Summary
lz4_flex is a pure Rust implementation of LZ4 compression/decompression. In versions 0.11.5 and below, and 0.12.0, decompressing invalid LZ4 data can leak sensitive information from uninitialized memory or from previous decompression operations. The library fails to properly validate offset values during LZ4 "match copy operations," allowing out-of-bounds reads from the output buffer. The block-based API functions (`decompress_into`, `decompress_into_with_dict`, and others when `safe-decode` is disabled) are affected, while all frame APIs are unaffected. The impact is potential exposure of sensitive data and secrets through crafted or malformed LZ4 input. This issue has been fixed in versions 0.11.6 and 0.12.1.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/PSeitz/lz4_flex/security/advis… | x_refsource_CONFIRM |
| https://github.com/PSeitz/lz4_flex/commit/055502e… | x_refsource_MISC |
| https://rustsec.org/advisories/RUSTSEC-2026-0041.html | x_refsource_MISC |
Impacted products
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