Red Hat Enterprise Linux 6/7/8/9 file-sgi plugin integer overflow

Summaryinfo

A vulnerability was found in Red Hat Enterprise Linux 6/7/8/9. It has been rated as critical. This vulnerability affects unknown code of the component file-sgi plugin. This manipulation causes integer overflow. This vulnerability is handled as CVE-2026-66757. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Red Hat Enterprise Linux 6/7/8/9. It has been declared as critical. Affected by this vulnerability is an unknown function of the component file-sgi plugin. The manipulation with an unknown input leads to a integer overflow vulnerability. The CWE definition for the vulnerability is CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. As an impact it is known to affect availability. The summary by CVE is:

A flaw was found in the file-sgi plugin in GIMP. When processing an RLE-compressed SGI image, the plugin allocates memory for a row table. The image header dimensions (ysize and zsize) are read as 16-bit unsigned integers. If a crafted file sets both dimensions to their maximum value (65535), the multiplication ysize * zsize overflows the standard 32-bit int boundary before being passed to calloc. This integer overflow issue results in undefined behavior, aborting the plugin and causing a denial of service.

It is possible to read the advisory at access.redhat.com. This vulnerability is known as CVE-2026-66757 since 07/27/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 07/27/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Operating System

Vendor

• Red Hat

Name

• Enterprise Linux

Version

• 6
• 7
• 8
• 9

License

• commercial

Website

• Vendor: https://www.redhat.com/

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