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HIGH

CVE-2026-4775

CVSS v3

7.8

HIGH

EPSS Score

0.4 %

exploit probability, as of 2026-10-15

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • compat-libtiff3AlmaLinux:8all versions · fixed in 3.9.4-15.el8_10
  • libtiffAlmaLinux:10all versions · fixed in 4.6.0-8.el10_2.1and 2 other packages
  • libtiffAlmaLinux:9all versions · fixed in 4.4.0-18.el9_8and 2 other packages
  • libtiffAlmaLinux:8all versions · fixed in 4.0.9-37.el8_10and 2 other packages
  • mingw32-libtiffAlmaLinux:8all versions · fixed in 4.0.9-4.el8_10and 3 other packages

Vendor advisories

  • CVE-2026-4775 Red Hat Product Security636 products fixed · 4 known affected

    libtiff: libtiff: Arbitrary code execution or denial of service via signed integer overflow in TIFF file processing

    libtiff as a component of Red Hat Enterprise Linux 6 · libtiff-devel as a component of Red Hat Enterprise Linux 6 · libtiff-static as a component of Red Hat Enterprise Linux 6

  • RHSA-2026:74674 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat AI Base Images 3.4.3 (Neuron)

  • RHSA-2026:33388 Red Hat Product Security9 products fixed

    Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

  • RHSA-2026:30349 Red Hat Product Security9 products fixed

    Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update

  • RHSA-2026:30089 Red Hat Product Security2 products fixed

    Red Hat Security Advisory: Red Hat AI Inference Server 3.3.5 (CUDA)

  • RHSA-2026:30088 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat AI Inference Server 3.3.5 (ROCm)

23 more advisories

Full record on NVD

Description

A flaw was found in the libtiff library. A remote attacker could exploit a signed integer overflow vulnerability in the putcontig8bitYCbCr44tile function by providing a specially crafted TIFF file. This flaw can lead to an out-of-bounds heap write due to incorrect memory pointer calculations, potentially causing a denial of service (application crash) or arbitrary code execution.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2026-03-24
Last Modified
2026-10-02

Frequently asked questions

What is CVE-2026-4775?

A flaw was found in the libtiff library. A remote attacker could exploit a signed integer overflow vulnerability in the putcontig8bitYCbCr44tile function by providing a specially crafted TIFF file. This flaw can lead to an out-of-bounds heap write due to incorrect memory pointer calculations, potentially causing a denial of service (application crash) or arbitrary code execution.

Is CVE-2026-4775 actively exploited?

Active exploitation of CVE-2026-4775 has not been confirmed. Its EPSS score was 0.4% on 2026-10-15, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-4775?

CVE-2026-4775 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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