OSV-2021-652
Heap-use-after-free in ZSTD_freeDDict
No scoreFix available
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=33324
Crash type: Heap-use-after-free READ 4
Crash state:
ZSTD_freeDDict
blosc2_free_ctx
blosc2_schunk_free
What each source reports
OSV No score
Heap-use-after-free in ZSTD_freeDDict
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=33324
Crash type: Heap-use-after-free READ 4
Crash state:
ZSTD_freeDDict
blosc2_free_ctx
blosc2_schunk_free
- Record
OSV-2021-652- Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
c-blosc2OSS-Fuzz |
Listed versions, plus commit ranges v2.0.0v2.0.0-rc2v2.0.0.rc1v2.0.1v2.0.2 Show 4 moreShow lessv2.0.3v2.0.4v2.1.0v2.1.1 |
None known |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
OSV-2021-652 is a vulnerability with no CVSS score yet in c-blosc2, published April 18, 2021. No source lists public exploit code. A source reports a fix.