SUSE-SU-2026:2227-1
Vulnerability from csaf_suse - Published: 2026-06-03 08:06 - Updated: 2026-06-03 08:06Summary
Security update for LibVNCServer
Severity
Important
Notes
Title of the patch: Security update for LibVNCServer
Description of the patch: This update for LibVNCServer fixes the following issues:
- CVE-2026-44988: Fixed missing validation of rectangle width in tight gradient
decoding can lead to server-triggered out-of-bounds write (bsc#1266459).
Patchnames: SUSE-2026-2227,SUSE-SLE-Module-Packagehub-Subpackages-15-SP7-2026-2227
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
8.1 (High)
Affected products
Recommended
4 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: SUSE Linux Enterprise Module for Package Hub 15 SP7:libvncserver0-0.9.10-150000.4.38.1.aarch64 | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Module for Package Hub 15 SP7:libvncserver0-0.9.10-150000.4.38.1.ppc64le | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Module for Package Hub 15 SP7:libvncserver0-0.9.10-150000.4.38.1.s390x | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Module for Package Hub 15 SP7:libvncserver0-0.9.10-150000.4.38.1.x86_64 | — |
Vendor Fix
|
Threats
Impact
important
References
8 references
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"vulnerabilities": [
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"notes": [
{
"category": "general",
"text": "LibVNCClient is a library for easy implementation of a VNC client. In 0.9.15 and earlier, LibVNCClient\u0027s Tight encoding decoder uses fixed-size 2048-pixel scratch buffers for the Gradient filter, but it does not reject Tight rectangles whose width is larger than 2048 pixels. A malicious VNC server can send a crafted FramebufferUpdate rectangle using Tight encoding with NoZlib | ExplicitFilter and the Gradient filter. When a LibVNCClient-based client connects, the client processes the server-controlled rectangle width and writes beyond fixed-size Gradient buffers. This vulnerability is fixed with commit 5b270544b85233668b98161323297d418a8f5fd1.",
"title": "CVE description"
}
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"remediations": [
{
"category": "vendor_fix",
"details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
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"scores": [
{
"cvss_v3": {
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"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
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"title": "CVE-2026-44988"
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}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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