OSV-2021-727
UNKNOWN READ in MEM_read32
No scoreFix available
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=33956
Crash type: UNKNOWN READ
Crash state:
MEM_read32
ZSTD_compressBlock_greedy_extDict_row
ZSTD_ldm_blockCompress
What each source reports
OSV No score
UNKNOWN READ in MEM_read32
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=33956
Crash type: UNKNOWN READ
Crash state:
MEM_read32
ZSTD_compressBlock_greedy_extDict_row
ZSTD_ldm_blockCompress
- Record
OSV-2021-727- Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
zstdOSS-Fuzz |
Commit ranges | Not evaluated |
Not evaluated means the source gave git commits or a range we can't read, so we can't tell which releases are affected. A fixed version beside it is the source’s own claim.
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
OSV-2021-727 is a vulnerability with no CVSS score yet in zstd, published May 5, 2021. No source lists public exploit code. A source reports a fix.