Off-by-One Memory Corruption Vulnerability in GIMP's PNM File Parser
CVE-2026-58380

7.3HIGH

Key Information:

Vendor

Red Hat
Status
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9
Vendor
CVE Published:
6 July 2026

What is CVE-2026-58380?

A flaw exists in the PNM file format parser of GIMP that allows a specially crafted PNM file to exploit the pnmscanner_gettoken() function. Due to an off-by-one error in the loop boundary check, this vulnerability can lead to a null terminator being written past the end of a stack-allocated buffer. The resulting memory corruption opens the door for potential denial of service or execution of arbitrary code, posing significant risks to users of affected versions.

References

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

CVSS V3.1

Score:
7.3
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
Required
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Red Hat would like to thank bb1abu for reporting this issue.
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