PT-2025-15039 · C-Blosc2 · C-Blosc2

Published 2025-04-04 · Updated 2025-04-05 · CVE-2025-29476

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L

Name of the Vulnerable Software and Affected Versions c-blosc2 versions 2.17.0 and before

Description The issue is related to a Buffer Overflow vulnerability in the compress chunk fuzzer function when used with oss-fuzz. This vulnerability is identified in c-blosc2 on commit 16450518afddcb3139de627157208e49bfef6987.

Recommendations For c-blosc2 versions 2.17.0 and before, update to a version that fixes the Buffer Overflow vulnerability in the compress chunk fuzzer function. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

CVE-2025-29476

Affected Products

C-Blosc2

References · 14

• 🔥 https://github.com/lmarch2/poc/blob/main/c-blosk2/c-blosk2.md · Exploit
• https://osv.dev/vulnerability/UBUNTU-CVE-2025-29476 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2025-29476 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2025-29476 · Vendor Advisory
• https://ubuntu.com/security/CVE-2025-29476 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2025-29476 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-29476 · Security Note
• https://security-tracker.debian.org/tracker/CVE-2025-29476 · Vendor Advisory
• https://github.com/Blosc/c-blosc2/issues/656 · Note
• https://github.com/Blosc/c-blosc2/pull/658 · Note
• https://t.me/cvedetector/22169 · Telegram Post
• https://t.me/cvetracker/20868 · Telegram Post
• https://twitter.com/cybercronai/status/1908644698639434182 · Twitter Post
• https://twitter.com/CVEnew/status/1908438506998812861 · Twitter Post