CVE-2026-12912

A flaw was found in libtiff. A remote attacker could exploit this vulnerability by providing a specially crafted PixarLog-compressed TIFF image. This issue occurs when decoding Pixarlog codec images with the PIXARLOGDATAFMT_8BITABGR output format and a specific stride value, leading to a heap-based buffer overflow. This could potentially result in arbitrary code execution or a denial of service (DoS).

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• tiff https://gitlab.com/libtiff/libtiff/-/work_items/824 https://gitlab.com/libtiff/libtiff/-/merge_requests/873 https://gitlab.com/libtiff/libtiff/-/commit/ba2b04b114c5dd945107ccc613cedfcca3af73bb (v4.7.2rc2) https://gitlab.com/libtiff/libtiff/-/commit/51fa6dfe93f20da0d38f079fbc61c7c960bcbc16 (v4.7.2rc2) https://gitlab.com/libtiff/libtiff/-/work_items/828 https://gitlab.com/libtiff/libtiff/-/merge_requests/883 https://gitlab.com/libtiff/libtiff/-/commit/f9bda11bf2fc819b971517582666d56f18b1bc3f (v4.7.2rc2) https://gitlab.com/libtiff/libtiff/-/commit/90601d9a23382d98f3695ec14441145c37a77574 (v4.7.2rc2)