CVE-2023-37188 — C-blosc2 before 2

C-blosc2 before 2.9.3 was discovered to contain a NULL pointer dereference via the function zfp_rate_decompress at zfp/blosc2-zfp.c.

01What is this vulnerability?

C-blosc2 before 2.9.3 was discovered to contain a NULL pointer dereference via the function zfp_rate_decompress at zfp/blosc2-zfp.c.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-12-25T00:00:00.000Z
• Last modified: 2024-08-02T17:09:33.159Z

09References

• github.com — https://github.com/Blosc/c-blosc2/commit/425e8a9a59d49378d57e2116b6c9b0190a5986f…
• github.com — https://github.com/Blosc/c-blosc2/issues/521
• github.com — https://github.com/Blosc/c-blosc2/compare/v2.9.2...v2.9.3