CVE-2021-36692 json
libjxl v0.3.7 is affected by a Divide By Zero in issue in lib/extras/codec_apng.cc jxl::DecodeImageAPNG().
published 2021-08-30 5 y ago modified 2026-06-17 4 mo ago also EUVD-2021-23287
- cvss
- 6.5
- version 3.1, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.2%
- EPSS 1.2% chance of exploitation in 30 days, percentile 68%
- public exploits
- 0
- none known
Summary
libjxl 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 cjxl, an attacker can trigger a denial of service.
Patch / fix
- github.com/libjxl/libjxl@7dfa400 commit
- github.com/libjxl/libjxl#313 pull request
Exploit prediction
1.22% chance of exploitation in the next 30 days, higher than 68% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/libjxl/libjxl/issues/308 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H |
| NVD | 2.0 | 4.3 | AV:N/AC:M/Au:N/C:N/I:N/A:P |
Classification
- Weakness
-
- CWE-369 Divide By Zero
References
-
github.com
/libjxl/libjxl/pull/313
patch, third-party-advisory
-
github.com
/libjxl/libjxl/commit/7dfa400ded53919d986c5d3d23446a09e0cf481b
patch, third-party-advisory
-
github.com
/libjxl/libjxl/issues/308
exploit, issue-tracking, third-party-advisory
Sources
- CVE List CVE-2021-36692
- NVD CVE-2021-36692
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