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 remote Debian 11 host has packages installed that are affected by a vulnerability as referenced in the dla-4536 advisory.

    - -------------------------------------------------------------------------     Debian LTS Advisory DLA-4536-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/               Emilio Pozuelo Monfort     April 17, 2026                                https://wiki.debian.org/LTS
    - -------------------------------------------------------------------------

    Package        : tiff     Version        : 4.2.0-1+deb11u8     CVE ID         : CVE-2026-4775

    Quang Luong discovered a heap overflow in the libtiff library, which may     result in denial of service or the execution of arbitrary code if     malformed image files are processed.

    For Debian 11 bullseye, this problem has been fixed in version     4.2.0-1+deb11u8.

    We recommend that you upgrade your tiff packages.

    For the detailed security status of tiff please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/tiff

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS

Tenable has extracted the preceding description block directly from the Debian 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.

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.

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-014287 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.

Tenable has extracted the preceding description block directly from the Unity Linux 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 remote Debian 12 / 13 host has packages installed that are affected by a vulnerability as referenced in the dsa-6303 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6203-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     April 08, 2026                        https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : tiff     CVE ID         : CVE-2026-4775

    Quang Luong discovered a heap overflow in the libtiff library, which may     result in denial of service or the execution of arbitrary code if     malformed image files are processed.

    For the oldstable distribution (bookworm), this problem has been fixed     in version 4.5.0-6+deb12u4.

    For the stable distribution (trixie), this problem has been fixed in     version 4.7.0-3+deb13u2.

    We recommend that you upgrade your tiff packages.

    For the detailed security status of tiff please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/tiff

    Further information about Debian Security Advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

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

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

An update of the libtiff package has been released.

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.

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.

ID	Name	Product	Family	Published	Updated	Severity
306303	Amazon Linux 2 : libtiff, --advisory ALAS2-2026-3235 (ALAS-2026-3235)	Nessus	Amazon Linux Local Security Checks	4/14/2026	4/14/2026	high
307615	Debian dla-4536 : libtiff-dev - security update	Nessus	Debian Local Security Checks	4/20/2026	4/20/2026	high
303486	Linux Distros Unpatched Vulnerability : CVE-2026-4775	Nessus	Misc.	3/24/2026	4/17/2026	high
306267	Amazon Linux 2 : compat-libtiff3, --advisory ALAS2-2026-3234 (ALAS-2026-3234)	Nessus	Amazon Linux Local Security Checks	4/14/2026	4/14/2026	high
310002	Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: libtiff (UTSA-2026-014287)	Nessus	Unity Linux Local Security Checks	4/23/2026	4/27/2026	high
307676	Debian dsa-6303 : libtiff-dev - security update	Nessus	Debian Local Security Checks	4/21/2026	4/21/2026	high
306355	Photon OS 4.0: Libtiff PHSA-2026-4.0-0995	Nessus	PhotonOS Local Security Checks	4/14/2026	4/14/2026	medium
306039	FreeBSD : (lib)tiff -- Integer Overflow or Wraparound (766bb9b5-357f-11f1-98f0-00a098b42aeb)	Nessus	FreeBSD Local Security Checks	4/12/2026	4/12/2026	high
306232	Amazon Linux 2023 : libtiff, libtiff-devel, libtiff-static (ALAS2023-2026-1547)	Nessus	Amazon Linux Local Security Checks	4/13/2026	4/13/2026	high
306348	Photon OS 5.0: Libtiff PHSA-2026-5.0-0815	Nessus	PhotonOS Local Security Checks	4/14/2026	4/14/2026	medium

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