DEBIAN-CVE-2021-3520

See a problem?
Please try reporting it to the source first.
Source
https://security-tracker.debian.org/tracker/CVE-2021-3520
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-3520.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2021-3520
Upstream
Published
2021-06-02T13:15:13Z
Modified
2025-09-30T03:54:19Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

There's a flaw in lz4. An attacker who submits a crafted file to an application linked with lz4 may be able to trigger an integer overflow, leading to calling of memmove() on a negative size argument, causing an out-of-bounds write and/or a crash. The greatest impact of this flaw is to availability, with some potential impact to confidentiality and integrity as well.

References

Affected packages

Debian:11 / lz4

Package

Name
lz4
Purl
pkg:deb/debian/lz4?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.9.3-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / lz4

Package

Name
lz4
Purl
pkg:deb/debian/lz4?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.9.3-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / lz4

Package

Name
lz4
Purl
pkg:deb/debian/lz4?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.9.3-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:14 / lz4

Package

Name
lz4
Purl
pkg:deb/debian/lz4?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.9.3-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}