UBUNTU-CVE-2026-32829

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Source
https://ubuntu.com/security/CVE-2026-32829
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-32829.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-32829
Upstream
Published
2026-03-20T01:15:00Z
Modified
2026-06-30T18:17:53Z
Severity
  • 8.2 (High) CVSS_V4 - 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 CVSS Calculator
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

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.

References

Affected packages

Ubuntu:24.04:LTS / rust-lz4-flex

Package

Name
rust-lz4-flex
Purl
pkg:deb/ubuntu/rust-lz4-flex?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.11.1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librust-lz4-flex-dev",
            "binary_version": "0.11.1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-32829.json"

Ubuntu:25.10 / rust-lz4-flex

Package

Name
rust-lz4-flex
Purl
pkg:deb/ubuntu/rust-lz4-flex?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.11.3-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librust-lz4-flex-dev",
            "binary_version": "0.11.3-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-32829.json"

Ubuntu:26.04:LTS / rust-lz4-flex

Package

Name
rust-lz4-flex
Purl
pkg:deb/ubuntu/rust-lz4-flex?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

0.*
0.11.3-1
0.11.3-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librust-lz4-flex-dev",
            "binary_version": "0.11.3-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-32829.json"