How severe is CVE-2023-37187?

CVE-2023-37187 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-2023-37187 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-2023-37187?

CVE-2023-37187 affects Blosc C-blosc2. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-37187?

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-2023-37187 published?

CVE-2023-37187 was published on 2023-12-25 and last updated on 2026-06-17.

CVE-2023-37187

CVE-2023-37187 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 zfp/blosc2-zfp.c zfp_acc_decompress. function.

Frequently asked questions

What is CVE-2023-37187?: C-blosc2 before 2.9.3 was discovered to contain a NULL pointer dereference via the zfp/blosc2-zfp.c zfp_acc_decompress. function.
How severe is CVE-2023-37187?: CVE-2023-37187 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-2023-37187 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-2023-37187?: CVE-2023-37187 affects Blosc C-blosc2. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-37187?: 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-2023-37187 published?: CVE-2023-37187 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

CVE-2020-29367 — High (CVSS 7.8): blosc2.c in Blosc C-Blosc2 through 2.0.0.beta.5 has a heap-based buffer overflow when there is a lack of space to write…
CVE-2023-37188 — High (CVSS 7.5): C-blosc2 before 2.9.3 was discovered to contain a NULL pointer dereference via the function zfp_rate_decompress at…
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…
CVE-2023-37185 — High (CVSS 7.5): C-blosc2 before 2.9.3 was discovered to contain a NULL pointer dereference via the function zfp_prec_decompress at…
CVE-2024-3204 — High (CVSS 7.3): A vulnerability has been found in c-blosc2 up to 2.13.2 and classified as critical. Affected by this vulnerability is…
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…

All CVEs affecting Blosc C-blosc2 →

Other CWE-476 (NULL Pointer Dereference) vulnerabilities

CVE-2022-36648 — Critical (CVSS 10.0): The hardware emulation in the of_dpa_cmd_add_l2_flood of rocker device model in QEMU, as used in 7.0.0 and earlier,…
CVE-2020-14500 — Critical (CVSS 10.0): Secomea GateManager all versions prior to 9.2c, An attacker can send a negative value and overwrite arbitrary data.
CVE-2010-2495 — Critical (CVSS 10.0): The pppol2tp_xmit function in drivers/net/pppol2tp.c in the L2TP implementation in the Linux kernel before 2.6.34 does…
CVE-2026-46195 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: smb: client: validate dacloffset before building…
CVE-2026-31657 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: batman-adv: hold claim backbone gateways by…
CVE-2026-31436 — Critical (CVSS 9.8): In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: fix possible wrong descriptor…

Browse all CWE-476 (NULL Pointer Dereference) vulnerabilities →