CVE-2026-12912 Red Hat CVE debrief

Who should care

Users of libtiff, particularly those who process TIFF images from untrusted sources, should be aware of this vulnerability. This includes developers who use libtiff in their applications, as well as users who may receive TIFF images from potentially malicious sources. Additionally, operators and security teams responsible for managing and securing systems that use libtiff should also be aware of this vulnerability and take steps to mitigate its impact.

Technical summary

The vulnerability occurs in the libtiff library when processing PixarLog-compressed TIFF images. Specifically, it happens when decoding Pixarlog codec images with the PIXARLOGDATAFMT_8BITABGR output format and a specific stride value. This leads to a heap-based buffer overflow, which could result in arbitrary code execution or a denial of service (DoS). The vulnerability is particularly severe because it can be triggered by providing a specially crafted PixarLog-compressed TIFF image, which could be used by a remote attacker to exploit the vulnerability. Users of libtiff should be aware of this vulnerability and take steps to mitigate its impact.

Defensive priority

High

Recommended defensive actions

• Update libtiff to the latest version
• Validate and sanitize TIFF images before processing
• Implement memory safety measures when handling TIFF images
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record was published on 2026-06-29T17:16:28.230Z and was last modified on 2026-07-20T04:16:30.323Z. The NVD entry is currently Awaiting Analysis. This vulnerability affects libtiff, a library used for processing TIFF images. The vulnerability occurs when decoding Pixarlog codec images with the PIXARLOGDATAFMT_8BITABGR output format and a specific stride value, leading to a heap-based buffer overflow. The CVE record provides limited information about the vulnerability, and further analysis is required to fully understand its impact.

Official resources