CVE-2026-12912

Libtiff: libtiff: heap-based buffer overflow via crafted pixarlog-compressed tiff image

Published Jun 29, 2026 CVSS 3.1 · 7.3 High EPSS < 1% KEV · Not listed
Description
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).

Remediation

Vendor Workaround

To mitigate this issue, applications processing untrusted TIFF images should avoid explicitly configuring `PIXARLOGDATAFMT_8BITABGR` when decoding PixarLog-compressed TIFF images with three samples per pixel. This specific combination of output format and samples per pixel is required to trigger the heap-based buffer overflow.

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-6392-1 tiff security update
References
Link Providers
https://access.redhat.com/errata/RHSA-2026:34890 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:41892 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:42668 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:47183 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:47184 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:49671 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:50774 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:54638 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:54640 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:54642 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:58545 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:58553 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:58554 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:58556 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:61657 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:69292 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:73909 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:73959 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:73960 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:73961 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:73962 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:74458 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:74459 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:74460 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:74461 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:74462 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:74463 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:74674 cve-icon cve-icon
https://access.redhat.com/errata/RHSA-2026:83550 cve-icon cve-icon
https://access.redhat.com/security/cve/CVE-2026-12912 cve-icon cve-icon
https://bugzilla.redhat.com/show_bug.cgi?id=2492871 cve-icon cve-icon
https://gitlab.com/libtiff/libtiff/-/merge_requests/873 cve-icon cve-icon
https://gitlab.com/libtiff/libtiff/-/work_items/824 cve-icon cve-icon
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12912.json cve-icon
History
Type Values Removed Values Added
CPEs cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:8
cpe:/a:redhat:enterprise_linux:8
cpe:/o:redhat:rhel_els:6
Type Values Removed Values Added
CPEs cpe:/a:redhat:openshift_ai:3.4::el9
References
Type Values Removed Values Added
First Time appeared Redhat rhel Els
CPEs cpe:/o:redhat:rhel_els:7
Vendors & Products Redhat rhel Els
References
Type Values Removed Values Added
First Time appeared Redhat rhel Aus
Redhat rhel Eus Long Life
CPEs cpe:/a:redhat:rhel_aus:8.4::appstream
cpe:/a:redhat:rhel_aus:8.6::appstream
cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
Vendors & Products Redhat rhel Aus
Redhat rhel Eus Long Life
References
Type Values Removed Values Added
First Time appeared Redhat rhel E4s
Redhat rhel Tus
CPEs cpe:/a:redhat:rhel_e4s:8.8::appstream
cpe:/a:redhat:rhel_tus:8.8::appstream
Vendors & Products Redhat rhel E4s
Redhat rhel Tus
References
Type Values Removed Values Added
First Time appeared Redhat rhel Eus
CPEs cpe:/a:redhat:rhel_eus:9.6::appstream
cpe:/a:redhat:rhel_eus:9.6::crb
Vendors & Products Redhat rhel Eus
References
Type Values Removed Values Added
First Time appeared Redhat enterprise Linux Eus
CPEs cpe:/o:redhat:enterprise_linux_eus:10.0
Vendors & Products Redhat enterprise Linux Eus
References
Type Values Removed Values Added
CPEs cpe:/a:redhat:enterprise_linux:8::appstream
cpe:/a:redhat:enterprise_linux:8::crb
References
Type Values Removed Values Added
CPEs cpe:/o:redhat:enterprise_linux:9 cpe:/a:redhat:enterprise_linux:9::appstream
cpe:/a:redhat:enterprise_linux:9::crb
References
Type Values Removed Values Added
CPEs cpe:/o:redhat:enterprise_linux:10 cpe:/o:redhat:enterprise_linux:10.2
References
Type Values Removed Values Added
First Time appeared Libtiff
Libtiff libtiff
Redhat hardened Images
Vendors & Products Libtiff
Libtiff libtiff
Redhat hardened Images
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description 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).
Title Libtiff: libtiff: heap-based buffer overflow via crafted pixarlog-compressed tiff image
First Time appeared Redhat
Redhat enterprise Linux
Redhat hummingbird
Weaknesses CWE-122
CPEs cpe:/a:redhat:hummingbird:1
cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:6
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
Redhat hummingbird
References
Metrics cvssV3_1

{'score': 7.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H'}