Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-122330— Blosc c-blosc2 before 3.5.0 Divide-by-Zero via blosc2_schunk_get_slice_buffer()

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 3.5.0 版本之前，Blosc 项目中的 c-blosc2 库存在一个除以零漏洞。该漏洞位于 文件中的 函数。攻击者可通过提供精心构造的数据帧，其中包含未经检查的零值块大小（chunksize）或块大小（blocksize），从而触发该漏洞并导致应用程序崩溃。 具体而言，攻击者可构造一个恶意的 Blosc2 数据帧，通过 或 函数打开，并尝试将其作为切片（slice）读取。此操作将引发浮点异常信号（SIGFPE），最终导致进程终止。

CVSS 5.5 · Medium

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 1

VendorProduct Version RangeStatus
Blosc c-blosc2 < 3.5.0 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-122330

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Blosc c-blosc2 before 3.5.0 Divide-by-Zero via blosc2_schunk_get_slice_buffer()
Source: CVE Program / CVE List V5
Vulnerability Description
Blosc c-blosc2 before 3.5.0 contains a divide-by-zero vulnerability in blosc2_schunk_get_slice_buffer() in blosc/schunk.c that allows attackers to crash applications by supplying crafted frames with unchecked zero chunksize or blocksize values. Attackers can provide a malicious Blosc2 frame opened via blosc2_schunk_open() or blosc2_schunk_from_buffer() and read as a slice, raising SIGFPE and terminating the process.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
除零错误
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Blosc c-blosc2 0 ~ 3.5.0 -

II. Public POCs for CVE-2026-122330

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-122330

请登录查看更多情报信息。

Other References for CVE-2026-122330 (7)

IV. Related Vulnerabilities

Same product: c-blosc2
Same vendor: Blosc
Same weakness: CWE-369