CVE-2026-12912: Libtiff: libtiff: heap-based buffer overflow via crafted pixarlog-compressed tiff image

Severity: high (CVSS 7.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-29 · updated 2026-10-15
Weakness: CWE-122

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).

Affected products

Red Hat Enterprise Linux 10: all versions — fixed in 0:4.6.0-8.el10_2.4
Red Hat Enterprise Linux 10.0 Extended Update Support: all versions — fixed in 0:4.6.0-6.el10_0.4
Red Hat Enterprise Linux 7 Extended Lifecycle Support: all versions — fixed in 0:3.9.4-12.el7_9.3, 0:4.0.3-35.el7_9.3
Red Hat Enterprise Linux 8: all versions — fixed in 0:3.9.4-16.el8_10, 0:4.0.9-38.el8_10
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support: all versions — fixed in 0:3.9.4-13.el8_4.3, 0:4.0.9-18.el8_4.3
Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On: all versions — fixed in 0:3.9.4-13.el8_4.3, 0:4.0.9-18.el8_4.3
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support: all versions — fixed in 0:3.9.4-13.el8_6.3, 0:4.0.9-21.el8_6.3
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On: all versions — fixed in 0:3.9.4-13.el8_6.3, 0:4.0.9-21.el8_6.3
Red Hat Enterprise Linux 8.8 Telecommunications Update Service: all versions — fixed in 0:3.9.4-13.el8_8.3, 0:4.0.9-29.el8_8.3
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions: all versions — fixed in 0:3.9.4-13.el8_8.3, 0:4.0.9-29.el8_8.3
Red Hat Enterprise Linux 9: all versions — fixed in 0:4.4.0-18.el9_8.1
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions: all versions — fixed in 0:4.4.0-8.el9_2.6
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions: all versions — fixed in 0:4.4.0-12.el9_4.6
Red Hat Enterprise Linux 9.6 Extended Update Support: all versions — fixed in 0:4.4.0-13.el9_6.6
Red Hat Hardened Images: all versions — fixed in 4.7.1-2.4.hum1
Red Hat OpenShift AI 3.0: all versions — fixed in 1790276884, 1790276886, 1790276889, 1790276974, 1790277045
Red Hat OpenShift AI 3.2: all versions — fixed in 1790703494, 1790703497, 1790703506, 1790703568, 1790703586, 1790703590
Red Hat OpenShift AI 3.4: all versions — fixed in 1790703542

How to fix

Upgrade to a fixed version: Red Hat Enterprise Linux 10 0:4.6.0-8.el10_2.4; Red Hat Enterprise Linux 10.0 Extended Update Support 0:4.6.0-6.el10_0.4; Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:3.9.4-12.el7_9.3, 0:4.0.3-35.el7_9.3; Red Hat Enterprise Linux 8 0:3.9.4-16.el8_10, 0:4.0.9-38.el8_10; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:3.9.4-13.el8_4.3, 0:4.0.9-18.el8_4.3; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On 0:3.9.4-13.el8_4.3, 0:4.0.9-18.el8_4.3; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:3.9.4-13.el8_6.3, 0:4.0.9-21.el8_6.3; Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:3.9.4-13.el8_6.3, 0:4.0.9-21.el8_6.3; Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:3.9.4-13.el8_8.3, 0:4.0.9-29.el8_8.3; Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:3.9.4-13.el8_8.3, 0:4.0.9-29.el8_8.3; Red Hat Enterprise Linux 9 0:4.4.0-18.el9_8.1; Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:4.4.0-8.el9_2.6. Check the vendor advisory for mitigations.

References

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