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Back to active CVEs
Medium · CVSS 6.1CVE-2026-91786

Gnome-shell: gnome-shell: out-of-bounds read in remote search icon rendering due to unvalidated icon-data buffer sizeCVE-2026-91786

Answer in brief

CVE-2026-91786 records a Medium severity (CVSS 6.1) vulnerability in Gnome-shell: gnome-shell: out-of-bounds read in remote search icon rendering due to unvalidated icon-data buffer size. The current sources do not mark it as known exploited. The current feed maps Red Hat/gnome-shell (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 15, 2026Updated Sep 16, 2026Source checked Oct 30, 2026First seen by HOL Sep 15, 2026Material review Sep 16, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.1
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 6.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/gnome-shell (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Red Hat/gnome-shellgeneric*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Red Hat/gnome-shell.
  2. 2Review the reported fix. Source-reported workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.

Evidence timeline and material changes

  1. Published upstream

    Sep 15, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 16, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 15, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referencebugzilla.redhat.com
  • Source referencegitlab.gnome.org
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • gopacket: SCTP chunk sub-decoder out-of-bounds panics on crafted segmentsAlso CWE-125
  • Blender before 4.5.15 and 5.x before 5.2.3 Out-of-Bounds Read via GLOB BlockAlso CWE-125
  • Blender before 4.5.15 and 5.x before 5.2.3 Out-of-Bounds Read via blo_bhead_id AccessorsAlso CWE-125
  • Blender before 4.5.15 and 5.x before 5.2.3 Heap Out-of-Bounds Access via read_struct()Also CWE-125

Record context

Vulnerability class
Buffer Overflow
EPSS
Not reported
CWE IDs
CWE-125
Source
CVE List V5
Source checked
Oct 30, 2026
References
3 linked sources
Open source record