How severe is CVE-2024-3203?

CVE-2024-3203 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.

Is CVE-2024-3203 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2024-3203?

CVE-2024-3203 affects Blosc C-blosc2. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2024-3203?

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.

Does CVE-2024-3203 have an EU (EUVD) identifier?

Yes. CVE-2024-3203 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-31795.

When was CVE-2024-3203 published?

CVE-2024-3203 was published on 2024-04-02 and last updated on 2026-06-17.

CVE-2024-3203

CVE-2024-3203 is a high-severity vulnerability in Blosc C-blosc2 with a CVSS 3.x base score of 7.3. 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-122.

Key facts

Severity: High (CVSS 3.x base score 7.3)
CVSS v2: 7.5
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2024-31795
Weakness: CWE-122
Affected product: Blosc C-blosc2
Published: 2024-04-02
Last modified: 2026-06-17

Description

A vulnerability, which was classified as critical, was found in c-blosc2 up to 2.13.2. Affected is the function ndlz8_decompress of the file /src/c-blosc2/plugins/codecs/ndlz/ndlz8x8.c. The manipulation leads to heap-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 2.14.3 is able to address this issue. It is recommended to upgrade the affected component. VDB-259050 is the identifier assigned to this vulnerability.

Frequently asked questions

What is CVE-2024-3203?: A vulnerability, which was classified as critical, was found in c-blosc2 up to 2.13.2. Affected is the function ndlz8_decompress of the file /src/c-blosc2/plugins/codecs/ndlz/ndlz8x8.c. The manipulation leads to heap-based buffer overflow. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 2.14.3 is able to address this issue. It is recommended to upgrade the affected component. VDB-259050 is the identifier assigned to this vulnerability.
How severe is CVE-2024-3203?: CVE-2024-3203 has a CVSS 3.x base score of 7.3, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity low, and availability low.
Is CVE-2024-3203 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-3203?: CVE-2024-3203 affects Blosc C-blosc2. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2024-3203?: 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.
Does CVE-2024-3203 have an EU (EUVD) identifier?: Yes. CVE-2024-3203 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-31795.
When was CVE-2024-3203 published?: CVE-2024-3203 was published on 2024-04-02 and last updated on 2026-06-17.

References

Affected products (1)

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

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