CVE-2026-58380

Description

A flaw was found in GIMP's PNM file format parser. When parsing a specially crafted PNM file, the pnmscanner_gettoken() function writes a null terminator one byte past the end of a stack-allocated buffer due to an off-by-one error in the loop boundary check. This could lead to memory corruption, potentially resulting in denial of service or arbitrary code execution.

CVSS v3.1 Score

7.3

HIGH

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

Weakness Type (CWE)

CWE-193 CWE-193

References

Other References

https://access.redhat.com/security/cve/CVE-2026-58380 https://bugzilla.redhat.com/show_bug.cgi?id=2496135 https://gitlab.gnome.org/GNOME/gimp/-/commit/83699817 https://gitlab.gnome.org/GNOME/gimp/-/issues/16206

Frequently Asked Questions

What is CVE-2026-58380? +

A flaw was found in GIMP's PNM file format parser. When parsing a specially crafted PNM file, the pnmscanner_gettoken() function writes a null terminator one byte past the end of a stack-allocated buffer due to an off-by-one error in the loop boundary check. This could lead to memory corruption, potentially resulting in denial of service or arbitrary code execution. It has a CVSS v3.1 base score of 7.3 (HIGH).

How severe is CVE-2026-58380? +

CVE-2026-58380 has a CVSS v3.1 score of 7.3 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.

How do I check if I'm vulnerable to CVE-2026-58380? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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