Use of Out-of-range Pointer Offset Affecting lz4_flex package, versions <0.11.6>=0.12.0 <0.12.1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RUST-LZ4FLEX-15679874
- published18 Mar 2026
- disclosed16 Mar 2026
- creditMarcono1234
Introduced: 16 Mar 2026
NewCVE-2026-32829 (opens in a new tab)How to fix?
Upgrade lz4_flex to version 0.11.6, 0.12.1 or higher.
Overview
Affected versions of this package are vulnerable to Use of Out-of-range Pointer Offset in the block::decompress_into or block::decompress_into_with_dict functions. An attacker can access sensitive information from uninitialized memory or previous decompression operations by providing specially crafted LZ4 data that triggers out-of-bounds offset values during decompression. This is only exploitable if the block-based API is used and either the safe-decode feature flag is disabled or a reused output buffer is supplied.
Workaround
This vulnerability can be mitigated by zeroing the output buffer before calling the affected functions or by ensuring the safe-decode feature flag is enabled.