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Libjxl CVE-2021-27804

CRITICAL
Out-of-bounds Write (CWE-787)
2021-03-02 cve@mitre.org
Buffer Overflow Memory Corruption Libjxl
9.8
CVSS 3.1 · NVD
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Severity by source

NVD PRIMARY
9.8 CRITICAL
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

1
CVE Published
Mar 02, 2021 - 01:15 nvd
CRITICAL 9.8

DescriptionNVD

JPEG XL (aka jpeg-xl) through 0.3.2 allows writable memory corruption.

AnalysisAI

JPEG XL (aka jpeg-xl) through 0.3.2 allows writable memory corruption. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Technical ContextAI

This vulnerability is classified as Out-of-bounds Write (CWE-787), which allows attackers to write data beyond allocated buffer boundaries leading to code execution or crashes. JPEG XL (aka jpeg-xl) through 0.3.2 allows writable memory corruption. Affected products include: Libjxl Project Libjxl. Version information: through 0.3.2.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Validate write boundaries, use memory-safe languages, enable compiler protections (ASLR, stack canaries).

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Same weakness CWE-787 – Out-of-bounds Write

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CVE-2021-27804 vulnerability details – vuln.today
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