How severe is CVE-2023-37185?

CVE-2023-37185 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2023-37185 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-37185?

CVE-2023-37185 affects Blosc C-blosc2. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-37185?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2023-37185 published?

CVE-2023-37185 was published on 2023-12-25 and last updated on 2026-06-17.

CVE-2023-37185

CVE-2023-37185 is a high-severity vulnerability in Blosc C-blosc2 with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-476.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Blosc C-blosc2
Published: 2023-12-25
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is CVE-2023-37185?: C-blosc2 before 2.9.3 was discovered to contain a NULL pointer dereference via the function zfp_prec_decompress at zfp/blosc2-zfp.c.
How severe is CVE-2023-37185?: CVE-2023-37185 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2023-37185 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-37185?: CVE-2023-37185 affects Blosc C-blosc2. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-37185?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2023-37185 published?: CVE-2023-37185 was published on 2023-12-25 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:blosc:c-blosc2:*:*:*:*:*:*:*:*

More vulnerabilities in Blosc C-blosc2

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CVE-2023-37186 — High (CVSS 7.5): C-blosc2 before 2.9.3 was discovered to contain a NULL pointer dereference in ndlz/ndlz8x8.c via a NULL pointer to…
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CVE-2024-3203 — High (CVSS 7.3): A vulnerability, which was classified as critical, was found in c-blosc2 up to 2.13.2. Affected is the function…

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