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Vulnerability record · CVE-2021-27804 · published 2 March 2021
CVE-2021-27804: Libjxl project libjxl out-of-bounds write vulnerability
LLibjxl Project · Libjxl
JPEG XL (aka jpeg-xl) through 0.3.2 allows writable memory corruption.
9.8 CVSS 3.1 Critical EPSS 4.0% · top 9.8% CWE-787 · Out-of-bounds write
9.8CVSS 3.1 base score, v2 7.5
4.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD
Description
JPEG XL (aka jpeg-xl) through 0.3.2 allows writable memory corruption.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Affected products
1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.
References
| Link | Tags |
|---|---|
| http://packetstormsecurity.com/files/161623/jpeg-xl-0.3.1-Memory-Corruption.html | Third Party Advisory |
| http://seclists.org/fulldisclosure/2021/Mar/2 | Third Party Advisory |
| http://www.openwall.com/lists/oss-security/2021/03/01/3 | Mailing ListThird Party Advisory |
| https://gitlab.com/wg1/jpeg-xl/-/tags | Third Party Advisory |
| http://packetstormsecurity.com/files/161623/jpeg-xl-0.3.1-Memory-Corruption.html | Third Party Advisory |
| http://seclists.org/fulldisclosure/2021/Mar/2 | Third Party Advisory |
| http://www.openwall.com/lists/oss-security/2021/03/01/3 | Mailing ListThird Party Advisory |
| https://gitlab.com/wg1/jpeg-xl/-/tags | Third Party Advisory |
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Related vulnerabilities
Same products first, then exploited flaws of the same weakness class.
9.1CVE-2023-0645Libjxl project libjxl out-of-bounds read vulnerabilityAn out of bounds read exists in libjxl. An attacker using a specifically crafted file could cause an out of bounds read in the exif handler. We recom…EPSS 0.85%8.7CVE-2026-1837Libjxl project libjxl allocation without limits vulnerabilityA specially-crafted file can cause libjxl's decoder to write pixel data to uninitialized unallocated memory. Soon after that data from another uninit…EPSS 0.29%7.5CVE-2023-35790Libjxl project libjxl vulnerabilityAn issue was discovered in dec_patch_dictionary.cc in libjxl before 0.8.2. An integer underflow in patch decoding can lead to a denial of service, su…EPSS 0.77%7.5CVE-2021-36691Libjxl project libjxl vulnerabilitylibjxl v0.5.0 is affected by a Assertion failed issue in lib/jxl/image.cc jxl::PlaneBase::PlaneBase(). When encoding a malicous GIF file using cjxl, …EPSS 1.1%6.9CVE-2024-11403Libjxl project libjxl out-of-bounds read vulnerabilityThere exists an out of bounds read/write in LibJXL versions prior to commit 9cc451b91b74ba470fd72bd48c121e9f33d24c99. The JPEG decoder used by the JP…EPSS 0.63%6.9CVE-2024-11498Libjxl project libjxl uncontrolled resource consumption vulnerabilityThere exists a stack buffer overflow in libjxl. A specifically-crafted file can cause the JPEG XL decoder to use large amounts of stack space (up to …EPSS 0.60%6.5CVE-2022-34000Libjxl project libjxl vulnerabilitylibjxl 0.6.1 has an assertion failure in LowMemoryRenderPipeline::Init() in render_pipeline/low_memory_render_pipeline.cc.EPSS 0.89%6.5CVE-2021-36692Libjxl project libjxl divide by zero vulnerabilitylibjxl v0.3.7 is affected by a Divide By Zero in issue in lib/extras/codec_apng.cc jxl::DecodeImageAPNG(). When encoding a malicous APNG file using c…EPSS 1.2%
Source: NIST National Vulnerability Database (record CVE-2021-27804), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.
