CVE-2021-42716 - CVE House
Back to Database
Status published High CVE-2021-42716

An issue was discovered in stb stb_image.h 2.27. The PNM...

Vulnerability Description

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.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2021-42716

Credits & Attribution

No credits recorded in the NVD database.

References

More from nothings

View All →
CVE-2023-45682
Wild address read in vorbis_decode_packet_rest in stb_vorbis
Medium 5.3
CVE-2023-45681
Out of bounds heap buffer write in stb_vorbis
High 7.3
CVE-2023-45680
Null pointer dereference in vorbis_deinit in stb_vorbis
Medium 5.3
CVE-2023-45679
Attempt to free an uninitialized memory pointer in vorbis_deinit in stb_vorbis
High 7.3
CVE-2023-45678
Off-by-one heap buffer write in start_decoder in stb_vorbis
Medium 6.5

Affected Vendor

Affected Software

stb image.h, fedora
Vulnerable Versions:
2.27, 33, 34, 35

Timeline

Official Publish: October 21st, 2021
Last Modified: August 4th, 2024
Added to House: July 21st, 2026

CVSS Vectors

V3: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.