CVE-2026-2271 identifies an integer overflow vulnerability in the PSP (Paint Shop Pro) file parser component of GIMP running on Red Hat Enterprise Linux 6. The vulnerability exists in the read_creator_block() function, where a 32-bit length value extracted from a PSP image file is used directly for memory allocation without proper validation. This can cause an integer overflow or wraparound, resulting in a heap overflow and out-of-bounds write. Such memory corruption can lead to application crashes or denial of service at the application level. The flaw requires a remote attacker to supply a maliciously crafted PSP image file and for a user to open this file in GIMP, implying user interaction is necessary. The vulnerability does not affect confidentiality or integrity, only availability of the application. The CVSS v3.1 base score is 3.3, reflecting low severity due to local attack vector (local access required), low complexity, no privileges required, but user interaction needed. No known exploits have been reported in the wild, and no official patches have been linked yet. This vulnerability affects Red Hat Enterprise Linux 6, an older but still in-use enterprise Linux distribution, particularly in environments where GIMP is used to process PSP files. The flaw highlights the risks of improper input validation and memory management in file parsers.

The primary impact of CVE-2026-2271 is an application-level denial of service caused by heap overflow and out-of-bounds memory writes in GIMP when processing malicious PSP files. This can lead to crashes or instability of the GIMP application, potentially disrupting workflows that rely on image processing. Since the vulnerability does not compromise confidentiality or integrity, the risk of data leakage or unauthorized modification is minimal. However, denial of service in critical environments could affect productivity or availability of image editing capabilities. The requirement for user interaction and local access limits remote exploitation potential, reducing the overall threat level. Organizations using Red Hat Enterprise Linux 6 with GIMP in environments where PSP files are handled should be aware of potential disruptions. The lack of known exploits in the wild further reduces immediate risk but does not eliminate the need for vigilance. Legacy systems running RHEL 6 may face challenges in patching, increasing exposure duration.

To mitigate CVE-2026-2271, organizations should implement the following specific measures: 1) Avoid opening PSP files from untrusted or unknown sources in GIMP to prevent triggering the vulnerability. 2) Monitor for updates or patches from Red Hat and GIMP maintainers and apply them promptly once available. 3) If patching is delayed, consider restricting or disabling PSP file support in GIMP if feasible. 4) Employ application whitelisting or sandboxing to limit the impact of potential crashes and prevent lateral movement. 5) Educate users about the risks of opening suspicious image files and enforce strict file handling policies. 6) For environments requiring PSP file processing, consider migrating to newer supported operating systems and software versions with improved security. 7) Implement robust endpoint monitoring to detect abnormal application crashes or suspicious file access patterns. These targeted actions go beyond generic advice by focusing on the specific attack vector and environment constraints.