CVE-2021-27804
CVE-2021-27804 is a critical-severity vulnerability in Libjxl Project Libjxl with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: Critical (CVSS 3.x base score 9.8)
- CVSS v2: 7.5
- EPSS exploit prediction: 4% (89th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Libjxl Project Libjxl
- Published:
- Last modified:
Description
JPEG XL (aka jpeg-xl) through 0.3.2 allows writable memory corruption.
Frequently asked questions
- What is CVE-2021-27804?
- JPEG XL (aka jpeg-xl) through 0.3.2 allows writable memory corruption.
- How severe is CVE-2021-27804?
- CVE-2021-27804 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2021-27804 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 4% (89th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2021-27804?
- CVE-2021-27804 affects Libjxl Project Libjxl. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2021-27804?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
- When was CVE-2021-27804 published?
- CVE-2021-27804 was published on 2021-03-02 and last updated on 2026-06-17.
References
- http://packetstormsecurity.com/files/161623/jpeg-xl-0.3.1-Memory-Corruption.html
- http://seclists.org/fulldisclosure/2021/Mar/2
- http://www.openwall.com/lists/oss-security/2021/03/01/3
- https://gitlab.com/wg1/jpeg-xl/-/tags
Affected products (1)
- cpe:2.3:a:libjxl_project:libjxl:*:*:*:*:*:*:*:*
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- CVE-2024-11498 — High (CVSS 7.5): There exists a stack buffer overflow in libjxl. A specifically-crafted file can cause the JPEG XL decoder to use large…
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