Vulnerability record/PUBLISHED/Published Sep 15, 2026 11:00:53 UTC
CVE-2026-91786
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.
Base score6.1/ 10
SeverityMediumCVSS 3.1
Exploitability / impact
CVSS metric breakdown
Base severityMedium
Attack vectorLocalAV
Attack complexityLowAC
Privileges requiredNonePR
User interactionRequiredUI
ScopeUnchangedS
Confidentiality impactLowC
Integrity impactNoneI
Availability impactHighA
CVSS vector string
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:HCVSS communicates standardized severity and impact characteristics. It does not establish whether a system is exploitable in your specific environment.
Record context
CVE Numbering Authorityredhat
Last updatedNov 6, 2026 01:46:34 UTC
PublishedSep 15, 2026 11:00:53 UTC
ReservedSep 15, 2026 07:01:45 UTC
Credits
- Red Hat would like to thank Mami for reporting this issue.