How severe is CVE-2023-29996?

CVE-2023-29996 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-2023-29996 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2023-29996?

CVE-2023-29996 affects Emqx Nanomq. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2023-29996?

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-2023-29996 published?

CVE-2023-29996 was published on 2023-05-04 and last updated on 2026-06-17.

CVE-2023-29996

CVE-2023-29996 is a high-severity vulnerability in Emqx Nanomq 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% (54th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Emqx Nanomq
Published: 2023-05-04
Last modified: 2026-06-17

Description

In NanoMQ v0.15.0-0, segment fault with Null Pointer Dereference occurs in the process of decoding subinfo_decode and unsubinfo_decode.

Frequently asked questions

What is CVE-2023-29996?: In NanoMQ v0.15.0-0, segment fault with Null Pointer Dereference occurs in the process of decoding subinfo_decode and unsubinfo_decode.
How severe is CVE-2023-29996?: CVE-2023-29996 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-2023-29996 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (54th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2023-29996?: CVE-2023-29996 affects Emqx Nanomq. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2023-29996?: 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-2023-29996 published?: CVE-2023-29996 was published on 2023-05-04 and last updated on 2026-06-17.

References

https://github.com/emqx/nanomq/issues/1038

Affected products (1)

cpe:2.3:a:emqx:nanomq:0.15.0:*:*:*:*:*:*:*

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