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CVE-2026-103222— Blosc C-Blosc2 blosclz Decompression blosclz.c blosclz_decompress integer overflow

Quick assessment

Affected
Blosc C-Blosc2
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Blosc C-Blosc2 3.3.2 及更早版本中发现了一个漏洞。该漏洞影响 blosclz 解压组件中文件 的函数 。通过执行特定操作，可能导致整数溢出。该攻击可远程发起，但具有较高的复杂度，利用难度较大。升级到版本 3.3.3 可修复此问题，对应的补丁提交为 。建议升级受影响的组件以消除该风险。

CVSS 5.6 · Medium EPSS 0.28% · P18

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 4

VendorProduct Version RangeStatus
Blosc C-Blosc2 3.3.0 affected
3.3.1 affected
3.3.2 affected
3.3.3 unaffected
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I. Basic Information for CVE-2026-103222

Vulnerability Information
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Vulnerability Title
Blosc C-Blosc2 blosclz Decompression blosclz.c blosclz_decompress integer overflow
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Blosc C-Blosc2 3.3.0 cpe:2.3:a:blosc:c-blosc2:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-103222

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-103222

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Patches & Fixes for CVE-2026-103222 (1)

Vendor Pages for CVE-2026-103222 (1)

Other References for CVE-2026-103222 (1)

IV. Related Vulnerabilities

Same product: C-Blosc2
Same weakness: CWE-190

V. Comments for CVE-2026-103222

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