CVE-2026-122330

6.8 medium

Medium (6.8) in blosc c-blosc2.

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.

Severity

CVSS 4.0

6.8 medium

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

5.5 medium

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

CWE: CWE-369 Divide By Zero
OWASP Top 10: A10:2025 Mishandling of Exceptional Conditions
Published: 2026-11-05 15:11 UTC
Record from: the CVE List, synced 2026-11-05 15:28 UTC

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Affected

blosc:c-blosc2

Versions

From the CNA's record in the CVE List.

Product	Affected
Blosc c-blosc2	before 3.5.0

References

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