How severe is CVE-2021-30473?

CVE-2021-30473 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-30473 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-30473?

CVE-2021-30473 primarily affects Aomedia. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2021-30473?

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

When was CVE-2021-30473 published?

CVE-2021-30473 was published on 2021-05-06 and last updated on 2026-06-17.

CVE-2021-30473

CVE-2021-30473 is a critical-severity vulnerability in Aomedia with a CVSS 3.x base score of 9.8. 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-763.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (79th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-763
Affected product: Aomedia
Published: 2021-05-06
Last modified: 2026-06-17

Description

aom_image.c in libaom in AOMedia before 2021-04-07 frees memory that is not located on the heap.

Frequently asked questions

What is CVE-2021-30473?: aom_image.c in libaom in AOMedia before 2021-04-07 frees memory that is not located on the heap.
How severe is CVE-2021-30473?: CVE-2021-30473 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-30473 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (79th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-30473?: CVE-2021-30473 primarily affects Aomedia. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2021-30473?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2021-30473 published?: CVE-2021-30473 was published on 2021-05-06 and last updated on 2026-06-17.

References

Affected products (2)

cpe:2.3:a:aomedia:aomedia:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*

More vulnerabilities in Aomedia

CVE-2021-30475 — Critical (CVSS 9.8): aom_dsp/noise_model.c in libaom in AOMedia before 2021-03-24 has a buffer overflow.
CVE-2021-30474 — Critical (CVSS 9.8): aom_dsp/grain_table.c in libaom in AOMedia before 2021-03-30 has a use-after-free.
CVE-2023-6879 — Critical (CVSS 9.0): Increasing the resolution of video frames, while performing a multi-threaded encode, can result in a heap overflow in…
CVE-2020-36133 — High (CVSS 8.8): AOM v2.0.1 was discovered to contain a global buffer overflow via the component av1/encoder/partition_search.h.
CVE-2020-36131 — High (CVSS 8.8): AOM v2.0.1 was discovered to contain a stack buffer overflow via the component stats/rate_hist.c.
CVE-2020-36129 — High (CVSS 8.8): AOM v2.0.1 was discovered to contain a stack buffer overflow via the component src/aom_image.c.

All CVEs affecting Aomedia →

Other CWE-763 vulnerabilities

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CVE-2024-44852 — Critical (CVSS 9.8): Open Robotics Robotic Operating System 2 ROS2 navigation2 v.humble was discovered to contain a segmentation violation…
CVE-2021-42377 — Critical (CVSS 9.8): An attacker-controlled pointer free in Busybox's hush applet leads to denial of service and possible code execution…
CVE-2021-24028 — Critical (CVSS 9.8): An invalid free in Thrift's table-based serialization can cause the application to crash or potentially result in code…
CVE-2020-0103 — Critical (CVSS 9.8): In a2dp_aac_decoder_cleanup of a2dp_aac_decoder.cc, there is a possible invalid free due to memory corruption. This…

Browse all CWE-763 vulnerabilities →