CVE-2026-103222
Blosc C-Blosc2 blosclz Decompression blosclz.c blosclz_decompress integer overflow
- State
- Published
- Severity
- 6.3 Medium
- Published
- Sep 30, 2026
- Updated
- Sep 30, 2026
- Reserved
- Sep 30, 2026
Description
A vulnerability was determined in Blosc C-Blosc2 up to 3.3.2. This impacts the function blosclz_decompress of the file blosc/blosclz.c of the component blosclz Decompression. Executing a manipulation can lead to integer overflow. The attack may be launched remotely. A high complexity level is associated with this attack. The exploitability is said to be difficult. Upgrading to version 3.3.3 will fix this issue. This patch is called fe2964d114d97847f56570a0ab2be2c57ccbeedc. The affected component should be upgraded.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.3 Medium | CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X | VulDB |
| 3.1 | 5.6 Medium | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C | VulDB |
| 3.0 | 5.6 Medium | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L/E:X/RL:O/RC:C | VulDB |
| 2.0 | 5.1 Medium | AV:N/AC:H/Au:N/C:P/I:P/A:P/E:ND/RL:OF/RC:C | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
C-Blosc2Blosc |
|
References
- VDB-411905 | Blosc C-Blosc2 blosclz Decompression blosclz.c blosclz_decompress integer overflowvdb-entrytechnical-description
- VDB-411905 | CTI Indicators (IOB, IOC, IOA)signaturepermissions-required
- CVE-2026-103222 | CVE Analysis and Reportthird-party-advisory
- Submit #954976 | Blosc c-blosc2 >= 2.0.0, < fix commit fe2964d114d9 Memory Corruptionthird-party-advisory
- https://github.com/Blosc/c-blosc2/commit/fe2964d114d97847f56570a0ab2be2c57ccbeedcpatch
- https://github.com/Blosc/c-blosc2/releases/tag/v3.3.3patch
- https://github.com/Blosc/c-blosc2/product
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