A flaw was found in GNOME Shell. When processing icons from a remote search provider via D-Bus, the system fails to validate the icon's declared dimensions against the actual data buffer size. A malicious or compromised remote search provider could exploit this by providing oversized icon dimensions, leading to an out-of-bounds read. This can cause the GNOME Shell process to crash, disrupting the user's session, and potentially disclose sensitive information from adjacent memory.

The remote openSUSE 16 host has packages installed that are affected by a vulnerability as referenced in the openSUSE- SU-2026:21976-1 advisory.

    This update for gnome-shell fixes the following issue:

    - CVE-2026-91786: missing dimension validation when processing icons from a remote search provider via     D-Bus can lead to       an out-of-bounds read (bsc#1280619).

Tenable has extracted the preceding description block directly from the SUSE 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 SUSE Linux SLES16 / SLES_SAP16 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2026:23950-1 advisory.

    This update for gnome-shell fixes the following issue:

    - CVE-2026-91786: missing dimension validation when processing icons from a remote search provider via     D-Bus can lead to       an out-of-bounds read (bsc#1280619).

Tenable has extracted the preceding description block directly from the SUSE 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 SUSE Linux SLES12 / SLES_SAP12 host has packages installed that are affected by a vulnerability as referenced in the SUSE-SU-2026:4350-1 advisory.

    This update for gnome-shell fixes the following issue:

    - CVE-2026-91786: missing dimension validation when processing icons from a remote search provider via     D-Bus can lead to       an out-of-bounds read (bsc#1280619).

Tenable has extracted the preceding description block directly from the SUSE 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 GNOME Shell. When processing icons from a remote search provider via D-Bus, the system     fails to validate the icon's declared dimensions against the actual data buffer size. A malicious or     compromised remote search provider could exploit this by providing oversized icon dimensions, leading to     an out-of-bounds read. This can cause the GNOME Shell process to crash, disrupting the user's session, and     potentially disclose sensitive information from adjacent memory. (CVE-2026-91786)

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

ID	Name	Product	Family	Type	Severity
362569	openSUSE 16: gnome-extensions / gnome-shell / gnome-shell-calendar / etc (openSUSE-SU-2026:21976-1)	Nessus	SuSE Local Security Checks	Local	medium
362536	SUSE SLES16: gnome-extensions / gnome-shell / gnome-shell-devel / etc (SUSE-SU-2026:23950-1)	Nessus	SuSE Local Security Checks	Local	medium
350778	SUSE SLES12: gnome-shell / gnome-shell-browser-plugin / gnome-shell-devel / etc (SUSE-SU-2026:4350-1)	Nessus	SuSE Local Security Checks	Local	medium
345877	Linux Distros Unpatched Vulnerability : CVE-2026-91786	Nessus	Misc.	Local	medium

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CVE-2026-91786

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Tenable Plugins

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