An issue in libtiff 85f2ac8e0b01cb7db2bbecf4a3b891bdbef67938 allows an attacker to execute arbitrary code via the libtiff/tools/thumbnail.c: main() component

According to the versions of the libtiff packages installed, the EulerOS installation on the remote host is affected by the following vulnerabilities :

    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).(CVE-2026-12912)

    An integer overflow in the libtiff rgb2ycbcr utility's cvtRaster() function when computing strip buffer     sizes can result in an undersized heap allocation and subsequent heap-based buffer overflow during YCbCr     conversion of a crafted TIFF image(CVE-2026-52492)

    An issue in libtiff 85f2ac8e0b01cb7db2bbecf4a3b891bdbef67938 allows an attacker to execute arbitrary code     via the process_command_opts() function in tools/tiffcrop.c(CVE-2026-52490)

    An issue in libtiff 85f2ac8e0b01cb7db2bbecf4a3b891bdbef67938 allows an attacker to execute arbitrary code     via the libtiff/tools/thumbnail.c: main() component(CVE-2026-52491)

    ['Hi,\n\nI would like to disclose CVE-2026-36849, a denial of service vulnerability\nin libtiff.\n\n==     Summary ==\n\nAn issue in libtiff v4.7.1 allows an attacker to cause a denial of service\nvia a crafted     TIFF file containing a large SamplesPerPixel tag value.\n\n== Affected Versions ==\n\nlibtiff v4.7.1 and     prior\n\n== Patch ==', '== References ==\n\n- CVE: CVE-2026-36849\n- Issue:', 'Regards,\nSatriyo     Utomo\n(aleens-lab)'](CVE-2026-36849)

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

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

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - An issue in libtiff 85f2ac8e0b01cb7db2bbecf4a3b891bdbef67938 allows an attacker to execute arbitrary code
    via the libtiff/tools/thumbnail.c: main() component (CVE-2026-52491)

The version of libtiff installed on the remote host is prior to 4.0.3-35. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2026-3921 advisory.

    An issue in libtiff 85f2ac8e0b01cb7db2bbecf4a3b891bdbef67938 allows an attacker to execute arbitrary code     via the process_command_opts() function in tools/tiffcrop.c (CVE-2026-52490)

    An issue in libtiff 85f2ac8e0b01cb7db2bbecf4a3b891bdbef67938 allows an attacker to execute arbitrary code     via the libtiff/tools/thumbnail.c: main() component (CVE-2026-52491)

    An integer overflow in the libtiff rgb2ycbcr utility's cvtRaster() function when computing strip buffer     sizes can result in an undersized heap allocation and subsequent heap-based buffer overflow during YCbCr     conversion of a crafted TIFF image (CVE-2026-52492)

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

Note that Nessus has not tested for these issues 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.

  - An issue in libtiff 85f2ac8e0b01cb7db2bbecf4a3b891bdbef67938 allows an attacker to execute arbitrary code     via the libtiff/tools/thumbnail.c: main() component (CVE-2026-52491)

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

ID	Name	Product	Family	Type	Severity
364761	EulerOS 2.0 SP13 : libtiff (EulerOS-SA-2026-4157)	Nessus	Huawei Local Security Checks	Local	critical
364726	EulerOS 2.0 SP13 : libtiff (EulerOS-SA-2026-4066)	Nessus	Huawei Local Security Checks	Local	critical
461759	Echo: tiff: security update to 4.7.0-3+e15	Tenable Cloud Security	Echo Local Security Checks	Local	high
461759	Echo: tiff: security update to 4.7.0-3+e15	Tenable Self-Hosted Container Security	Echo Local Security Checks	Local	high
345804	Amazon Linux 2 : libtiff (ALAS-2026-3921)	Nessus	Amazon Linux Local Security Checks	Local	critical
340107	Linux Distros Unpatched Vulnerability : CVE-2026-52491	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-52491

high

Tenable Plugins

critical

critical

high

high

critical

high