How severe is CVE-2021-30475?

CVE-2021-30475 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-2021-30475 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-30475?

CVE-2021-30475 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-2021-30475?

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-2021-30475 published?

CVE-2021-30475 was published on 2021-06-04 and last updated on 2026-06-17.

CVE-2021-30475

CVE-2021-30475 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-120.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 7.5
EPSS exploit prediction: 2% (81st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-120
Affected product: Aomedia
Published: 2021-06-04
Last modified: 2026-06-17

Description

aom_dsp/noise_model.c in libaom in AOMedia before 2021-03-24 has a buffer overflow.

Frequently asked questions

What is CVE-2021-30475?: aom_dsp/noise_model.c in libaom in AOMedia before 2021-03-24 has a buffer overflow.
How severe is CVE-2021-30475?: CVE-2021-30475 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-2021-30475 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (81st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-30475?: CVE-2021-30475 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-2021-30475?: 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-2021-30475 published?: CVE-2021-30475 was published on 2021-06-04 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-2021-30474 — Critical (CVSS 9.8): aom_dsp/grain_table.c in libaom in AOMedia before 2021-03-30 has a use-after-free.
CVE-2021-30473 — Critical (CVSS 9.8): aom_image.c in libaom in AOMedia before 2021-04-07 frees memory that is not located on the heap.
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 →

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