How severe is CVE-2021-33657?

CVE-2021-33657 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-33657 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-33657?

CVE-2021-33657 affects Libsdl Simple Directmedia Layer. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-33657?

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-2021-33657 published?

CVE-2021-33657 was published on 2022-04-01 and last updated on 2026-06-17.

CVE-2021-33657

CVE-2021-33657 is a high-severity vulnerability in Libsdl Simple Directmedia Layer with a CVSS 3.x base score of 8.8. 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-787.

Key facts

Severity: High (CVSS 3.x base score 8.8)
CVSS v2: 6.8
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: Libsdl Simple Directmedia Layer
Published: 2022-04-01
Last modified: 2026-06-17

Description

There is a heap overflow problem in video/SDL_pixels.c in SDL (Simple DirectMedia Layer) 2.x to 2.0.18 versions. By crafting a malicious .BMP file, an attacker can cause the application using this library to crash, denial of service or Code execution.

Frequently asked questions

What is CVE-2021-33657?: There is a heap overflow problem in video/SDL_pixels.c in SDL (Simple DirectMedia Layer) 2.x to 2.0.18 versions. By crafting a malicious .BMP file, an attacker can cause the application using this library to crash, denial of service or Code execution.
How severe is CVE-2021-33657?: CVE-2021-33657 has a CVSS 3.x base score of 8.8, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-33657 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-33657?: CVE-2021-33657 affects Libsdl Simple Directmedia Layer. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-33657?: 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-2021-33657 published?: CVE-2021-33657 was published on 2022-04-01 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:libsdl:simple_directmedia_layer:*:*:*:*:*:*:*:*

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