A flaw was found in the file-pcx plugin in GIMP, affecting 32-bit builds only. When processing a PCX image file, the plugin calculates memory allocation sizes based on the image dimensions and the number of color planes. If a crafted file sets the number of planes to 4 alongside sufficiently large dimensions, the calculation exceeds the 32-bit integer limit and overflows, resulting in an undersized heap-based buffer allocation. This integer overflow issue results in a heap-based buffer overflow when the plugin subsequently writes image data into the undersized buffer, causing memory corruption, potentially leading to arbitrary code execution or a denial of service.

The remote SUSE Linux SLED15 / SLED_SAP15 / SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:4309-1 advisory.

    Security issues fixed:

    - CVE-2026-59088: denial of service via signed integer overflow in FLI file processing (bsc#1274837).
    - CVE-2026-59090: arbitrary code execution in PSD plugin due to unsigned underflow (bsc#1274840).
    - CVE-2026-66757: signed integer overflow in `file-sgi` causes the plugin to crash when RLE-compressed SGI     images are       processed (bsc#1273151).
    - CVE-2026-78465: 32-bit integer overflow in PCX image memory calculations can cause undersized heap     allocations       (bsc#1277378).
    - CVE-2026-80101: independent header field validation in the XWD loader can cause heap out-of-bounds reads       (bsc#1276911).

    Non security issues fixed:

    - RLE-compressed SGI files are written with a bad offset table and 57 of 144 scanlines fail to decode, on     the patched       and the released build alike (bsc#1279838).
    - XWD bytes-per-line guard can never fire, and load_xwd_f1_d24_b1() still allocates the unchecked header     field       (bsc#1279839).

Tenable has extracted the preceding description block directly from the SUSE 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 remote Debian 13 host has packages installed that are affected by multiple vulnerabilities as referenced in the dsa-6509 advisory.

    - -------------------------------------------------------------------------     Debian Security Advisory DSA-6509-1                   security@debian.org     https://www.debian.org/security/                       Moritz Muehlenhoff     September 20, 2026                    https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package        : gimp     CVE ID         : CVE-2026-78465 CVE-2026-78475 CVE-2026-82328                      CVE-2026-90947 CVE-2026-90948 CVE-2026-92248

    Several vulnerabilities were discovered in GIMP, the GNU Image     Manipulation Program, which could result in denial of service     or potentially the execution of arbitrary code if malformed     PSD, light effects filter, ICO, PIX or PCX files are opened.

    For the stable distribution (trixie), these problems have been fixed in     version 3.0.4-3+deb13u11.

    We recommend that you upgrade your gimp packages.

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

    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 these issues but has instead relied only on the application's self-reported version number.

The remote openSUSE 16 host has packages installed that are affected by multiple vulnerabilities as referenced in the openSUSE-SU-2026:21869-1 advisory.

    Changes in gimp:

    - CVE-2026-78465: 32-bit integer overflow in PCX image memory calculations can cause undersized heap     allocations (bsc#1277378)
    - CVE-2026-78475: unbounded variable-length stack allocations in the PIX loader can cause stack exhaustion     crashes and stack memory disclosures (bsc#1277380)
    - CVE-2026-80101: independent header field validation in the XWD loader can cause heap out-of-bounds reads     (bsc#1276911)

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

  - A flaw was found in the file-pcx plugin in GIMP, affecting 32-bit builds only. When processing a PCX image     file, the plugin calculates memory allocation sizes based on the image dimensions and the number of color     planes. If a crafted file sets the number of planes to 4 alongside sufficiently large dimensions, the     calculation exceeds the 32-bit integer limit and overflows, resulting in an undersized heap-based buffer     allocation. This integer overflow issue results in a heap-based buffer overflow when the plugin     subsequently writes image data into the undersized buffer, causing memory corruption, potentially leading     to arbitrary code execution or a denial of service. (CVE-2026-78465)

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

ID	Name	Product	Family	Type	Severity
349606	SUSE SLED15: gimp / gimp-devel / gimp-lang / gimp-plugin-aa / libgimp-2_0-0 / etc (SUSE-SU-2026:4309-1)	Nessus	SuSE Local Security Checks	Local	critical
348350	Debian dsa-6509 : gimp - security update	Nessus	Debian Local Security Checks	Local	high
347919	openSUSE 16: gimp / gimp-devel / gimp-extension-goat-excercises / gimp-lang / etc (openSUSE-SU-2026:21869-1)	Nessus	SuSE Local Security Checks	Local	high
339188	Linux Distros Unpatched Vulnerability : CVE-2026-78465	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-78465

high

Tenable Plugins

critical

high

high

high