CVSS 3.1
7.1 highCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:HCVE-2021-42716
High (7.1). EPSS 1.5% chance of exploitation in the next 30 days.
An issue was discovered in stb stb_image.h 2.27. The PNM loader incorrectly interpreted 16-bit PGM files as 8-bit when converting to RGBA, leading to a buffer overflow when later reinterpreting the result as a 16-bit buffer. An attacker could potentially have crashed a service using stb_image, or read up to 1024 bytes of non-consecutive heap data without control over the read location.
Severity
- EPSS
- 1.5% chance of exploitation in the next 30 days; higher than 73% of CVEs (scores of 2026-10-31)
- CWE
- CWE-120
- Published
- Modified
- Record from
- the NVD, synced
Affected
- fedoraproject:fedora
- nothings:stb_image.h
References
- https://github.com/nothings/stb/issues/1166
- https://github.com/nothings/stb/issues/1225
- https://github.com/nothings/stb/pull/1223
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3TDGZFLBOP27LZKLH45WQLSNPSPP7S7Z/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/AF2CNP4FVC6LDKNOO4WDCGNDYIP3MPK6/