Vulnerability Database · OSS-Fuzz · Package report
c-blosc2: vulnerability history, versions and safety
c-blosc2 is a package in the OSS-Fuzz ecosystem. Vulert records 75 vulnerabilities for it across 57 releases, from Jul 2020 to May 2025. Each vulnerability names the versions it affects, the fixed version to move to, and a workaround where no fix has been published.
No patched version yet — these are the ones to plan around.
See the unfixed vulnerabilities →No published version shipped hostile code.
Vulert verdict on c-blosc2 i
Updated on 23 Oct 2026
Careful: 8 of the 75 vulnerabilities Vulert records for this package have no fix yet. Plan around those, or apply the workaround listed for each. The rest have a fixed version to move to.
What to do: Plan around the 8 vulnerabilities with no published fix: each lists the affected range and any workaround that reduces exposure. No fix yet: Vulert alerts you the moment one is published. Monitor it with Vulert →
- Vulnerabilities on record 75 over 4 years · 0 in the last year i
- Latest disclosure 02 May 2025 i
- Highest CVSS n/a i
- With no published fix 8 i
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01 Versions
Which versions are affected
Every version Vulert holds for c-blosc2, newest first, with the vulnerabilities that name it. A version with a count of zero has no recorded vulnerabilities; open a version to see the vulnerabilities it is exposed to.
Newest 57 of 57 versions on record. Severity counts are the vulnerabilities recorded against that exact release.
02 Disclosure history
How often vulnerabilities are recorded
Counted by the year Vulert recorded each vulnerability — the same date the table below shows as disclosed. 0 of the 75 were recorded in the last 12 months.
Other ways into the data
03 Vulnerabilities
Recorded vulnerabilities for c-blosc2
| Vulnerability | Severity | Fixed version ↓ | Disclosed ↓ |
|---|---|---|---|
| Heap-buffer-overflow in frame_get_metalayers in c-blosc2 | N/A medium | 7f4574f51ad7db56fc13de89e13e7893b1a82189 | 09 Apr 2022 |
| Use-of-uninitialized-value in ZSTD_createDDict_advanced in c-blosc2 | N/A medium | a83f4780ccd23eee46541d5789b9be1c1f6f696c | 22 Jul 2020 |
| Heap-buffer Overflow Vulnerability in c-blosc2 Package | N/A medium | No fix published | 02 May 2025 |
| Heap-buffer-overflow in ndlz8_decompress in c-blosc2 | N/A high | ce2e8fe5f2fdb3779505935f05f93481d4905e62 | 18 Dec 2021 |
| Heap-buffer-overflow in ndlz4_decompress in c-blosc2 | N/A high | 36fbefb68fd04d9399aec57e46f4ed44a84c39e1 | 17 Dec 2021 |
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Updated: 23/Oct/2026 · Vulnerabilities in our DB: 524315
