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.

An update of the libtiff package has been released.

The version of libtiff installed on the remote host is prior to 4.0.3-35. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3235 advisory.

    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. (CVE-2026-4775)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of compat-libtiff3 installed on the remote host is prior to 3.9.4-12. It is, therefore, affected by a vulnerability as referenced in the ALAS2-2026-3234 advisory.

    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. (CVE-2026-4775)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1547 advisory.

    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. (CVE-2026-4775)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the 766bb9b5-357f-11f1-98f0-00a098b42aeb advisory.

    PrymEvol and Quang Luong reports:
    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.


Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-4775)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
306355	Photon OS 4.0: Libtiff PHSA-2026-4.0-0995	Nessus	PhotonOS Local Security Checks	medium
306348	Photon OS 5.0: Libtiff PHSA-2026-5.0-0815	Nessus	PhotonOS Local Security Checks	medium
306303	Amazon Linux 2 : libtiff, --advisory ALAS2-2026-3235 (ALAS-2026-3235)	Nessus	Amazon Linux Local Security Checks	high
306267	Amazon Linux 2 : compat-libtiff3, --advisory ALAS2-2026-3234 (ALAS-2026-3234)	Nessus	Amazon Linux Local Security Checks	high
306232	Amazon Linux 2023 : libtiff, libtiff-devel, libtiff-static (ALAS2023-2026-1547)	Nessus	Amazon Linux Local Security Checks	high
306039	FreeBSD : (lib)tiff -- Integer Overflow or Wraparound (766bb9b5-357f-11f1-98f0-00a098b42aeb)	Nessus	FreeBSD Local Security Checks	high
303486	Linux Distros Unpatched Vulnerability : CVE-2026-4775	Nessus	Misc.	high

Detections

Analytics

CVE-2026-4775

high

Tenable Plugins

medium

medium

high

high

high

high

high