Review reviewHigh

CVE-2026-32829

PSeitz lz4_flex, Logging for Red Hat OpenShift 6.2, Logging Subsystem for Red Hat OpenShift 6.4

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...

CVSS: 8.2
EPSS: 0.61%
CISA KEV: Not listed
Published: 2026.03.20

PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV

Exploit probability0.61%

Technical severityCVSS 8.2

Vulnerability overview

Affected product and versions

Product: PSeitz lz4_flex, Logging for Red Hat OpenShift 6.2, Logging Subsystem for Red Hat OpenShift 6.4
Affected versions: >= < 0.11.6, >= >= 0.12.0, < 0.12.1, < 0.11.6, 0.12.0
Fixed versions: 0.11.6

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide

1
Identify
Confirm that PSeitz lz4_flex, Logging for Red Hat OpenShift 6.2, Logging Subsystem for Red Hat OpenShift 6.4 and an affected version are present.
2
Prioritize
Combine exploitation signals with asset exposure and business criticality.
3
Remediate
Follow the vendor advisory or supported update path and preserve rollback options.
4
Verify
Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CWE: CWE-201, CWE-823