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TI-2023-18820 Aliases CVE-2023-37186GHSA-7vjq-m92p-42wp

C-blosc2 before 2.9.3 was discovered to contain a NULL pointer dereference in…

Priority LOW 34CWE-476Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-476.

Summary

C-blosc2 before 2.9.3 was discovered to contain a NULL pointer dereference in ndlz/ndlz8x8.c via a NULL pointer to memset.

Why it matters now

EPSS 0.00834 57th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:blosc:c-blosc2:*:*:*:*:*:*:*:*before 2.9.3VulnerableBlosc
  • cpe:2.3:a:blosc:c-blosc2:*:*:*:*:*:*:*:* Versions before 2.9.3 Vulnerable ·Blosc

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2023-37186
  2. 2026-10-03 Alias added: GHSA-7vjq-m92p-42wp

References

Exploit 1

Patch 1

Other 1

  • TI-2024-03004 c-blosc2 ndlz4x4.c ndlz4_decompress heap-based overflow CVSS 3.1CRITICAL 9.8
  • TI-2024-03003 c-blosc2 ndlz8x8.c ndlz8_decompress heap-based overflow CVSS 3.1CRITICAL 9.8
  • TI-2023-18819 C-blosc2 before 2.9.3 was discovered to contain a NULL pointer dereference via the… CVSS 3.1HIGH 7.5
  • TI-2020-17648 blosc2.c in Blosc C-Blosc2 through 2.0.0.beta.5 has a heap-based buffer overflow when… CVSS 3.1HIGH 7.8
  • TI-2023-18822 C-blosc2 before 2.9.3 was discovered to contain a NULL pointer dereference via the… CVSS 3.1HIGH 7.5
  • TI-2023-18821 C-blosc2 before 2.9.3 was discovered to contain a NULL pointer dereference via the… CVSS 3.1HIGH 7.5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences