What’s Vulnerable › Vulnerabilities

CVE-2021-21235: Infinite loop in parsing PNG files in

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-01-06 · updated 2026-06-17
• Weakness: CWE-400

Description

kamadak-exif is an exif parsing library written in pure Rust. In kamadak-exif version 0.5.2, there is an infinite loop in parsing crafted PNG files. Specifically, reader::read_from_container can cause an infinite loop when a crafted PNG file is given. This is fixed in version 0.5.3. No workaround is available. Applications that do not pass files with the PNG signature to Reader::read_from_container are not affected.

Affected products

• kamadak exif-rs: 0.5.2

References

• https://crates.io/crates/kamadak-exif
• https://github.com/kamadak/exif-rs/commit/f21df24616ea611c5d5d0e0e2f8042eb74d5ff48
• https://github.com/kamadak/exif-rs/security/advisories/GHSA-px9g-8hgv-jvg2
• https://crates.io/crates/kamadak-exif
• https://github.com/kamadak/exif-rs/commit/f21df24616ea611c5d5d0e0e2f8042eb74d5ff48
• https://github.com/kamadak/exif-rs/security/advisories/GHSA-px9g-8hgv-jvg2

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