How severe is CVE-2022-40738?

CVE-2022-40738 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2022-40738 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-40738?

CVE-2022-40738 affects Axiosys Bento4. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-40738?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2022-40738 published?

CVE-2022-40738 was published on 2022-09-15 and last updated on 2026-06-17.

CVE-2022-40738

CVE-2022-40738 is a medium-severity vulnerability in Axiosys Bento4 with a CVSS 3.x base score of 6.5. 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: Medium (CVSS 3.x base score 6.5)
EPSS exploit prediction: 1% (44th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-476
Affected product: Axiosys Bento4
Published: 2022-09-15
Last modified: 2026-06-17

Description

An issue was discovered in Bento4 through 1.6.0-639. A NULL pointer dereference occurs in AP4_DescriptorListWriter::Action in Core/Ap4Descriptor.h, called from AP4_EsDescriptor::WriteFields and AP4_Expandable::Write.

Frequently asked questions

What is CVE-2022-40738?: An issue was discovered in Bento4 through 1.6.0-639. A NULL pointer dereference occurs in AP4_DescriptorListWriter::Action in Core/Ap4Descriptor.h, called from AP4_EsDescriptor::WriteFields and AP4_Expandable::Write.
How severe is CVE-2022-40738?: CVE-2022-40738 has a CVSS 3.x base score of 6.5, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2022-40738 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (44th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-40738?: CVE-2022-40738 affects Axiosys Bento4. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-40738?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-40738 published?: CVE-2022-40738 was published on 2022-09-15 and last updated on 2026-06-17.

References

https://github.com/axiomatic-systems/Bento4/issues/756

Affected products (1)

cpe:2.3:a:axiosys:bento4:*:*:*:*:*:*:*:*

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