Skip to content
Noroxi
CVE.org (no NVD analysis yet)· CNA suse

CVE-2026-93536: X.Org Server GestureBuildSprite Use-After-Free

Noroxi assessment

Priority: Monitor (action score 21/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.16% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
  • Fixed version: x.org xorg-x11-server 21.1.25; x.org xwayland 24.1.14; azl3 wayland 1.22.0-1 on Azure Linux 3.0 Release Notes.

Low priority for now. Upgrade to x.org xorg-x11-server 21.1.25; x.org xwayland 24.1.14; azl3 wayland 1.22.0-1 on Azure Linux 3.0 Release Notes or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A use after free caused by missing lifecycle management of gesture sprites in GestureBuildSprite() in X.Org X Server before 21.1.25 and XWayland before 24.1.14 could be used by authenticated X clients to crash the X server or potentially execute code.

MediumCVSS 5.3 · v3.1—No exploit Fix available
Published
Oct 28, 2026
Updated
Oct 28, 2026
EPSS
0.1% · 5th percentile

Report tools

JSON

Action score

21

Monitor

Low priority for now.

CVSS
21 / 40 · 5.3 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CNA vs NVD score

NVD
—
CNA · suse
5.3
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-93536

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for x.org records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (suse). Independent of NVD's CPE analysis and usually ahead of it.

  • x.org xorg-x11-server

    • before 21.1.25affected · rpm

  • x.org xwayland

    • before 24.1.14affected · rpm

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12xorg-serverfrom 0—
Debian:12xwaylandfrom 0—
Debian:14xorg-serverbefore 2:21.1.25-12:21.1.25-1
Debian:14xwaylandbefore 2:24.1.14-12:24.1.14-1
openSUSE:Leap 16.0xwaylandbefore 24.1.6-160000.7.124.1.6-160000.7.1
openSUSE:Tumbleweedxorg-x11-serverbefore 21.1.24-2.121.1.24-2.1
openSUSE:Tumbleweedxwaylandbefore 24.1.13-2.124.1.13-2.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSxorg-x11-serverbefore 21.1.4-150500.7.55.121.1.4-150500.7.55.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7xorg-x11-serverbefore 21.1.15-150700.5.25.121.1.15-150700.5.25.1
SUSE:Linux Enterprise Server 15 SP6-LTSSxorg-x11-serverbefore 21.1.11-150600.5.34.121.1.11-150600.5.34.1
SUSE:Linux Enterprise Server 16.0xwaylandbefore 24.1.6-160000.7.124.1.6-160000.7.1
SUSE:Linux Enterprise Workstation Extension 15 SP7xwaylandbefore 24.1.5-150700.3.25.124.1.5-150700.3.25.1

Same product

x.org: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-93523X.Org Server XInput2 PassiveUngrabDevice Out-of-Bounds Write
    31Monitor
  • CVE-2026-93522X.Org Server Glamor CopyArea Heap Buffer Overflow
    31Monitor
  • CVE-2026-93521X.Org Server RandR ChangeProviderProperty Heap Buffer Overflow
    31Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-93519Oct 28, 2026 · X.Org Server XFixes Pointer Barrier Event List Buffer Overflow
    31Monitor
  • ← EarlierCVE-2026-93520Oct 28, 2026 · X.Org Server XKB ChangeKeycodeRange Heap Out-of-Bounds Write
    31Monitor
  • ← EarlierCVE-2026-93524Oct 28, 2026 · X.Org Server XKB SetMap Key Width/Action Count Desync Out-Of-Bounds Read
    27Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
x.org xorg-x11-server21.1.25Vendor (CNA)
x.org xwayland24.1.14Vendor (CNA)
azl3 wayland 1.22.0-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
debian:xorg-server2:21.1.25-1 · Debian:14Package registry (OSV)
debian:xwayland2:24.1.14-1 · Debian:14Package registry (OSV)
opensuse:xorg-x11-server21.1.24-2.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:xwayland24.1.13-2.1 · openSUSE:TumbleweedPackage registry (OSV)
suse:xorg-x11-server21.1.4-150500.7.55.1 · SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSPackage registry (OSV)
suse:xwayland24.1.6-160000.7.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 1, 2026+4 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-935180 days apartX.Org Server XKB ResizeKeyType Numeric Truncation
    31Monitor
  • CVE-2026-935190 days apartX.Org Server XFixes Pointer Barrier Event List Buffer Overflow
    31Monitor
  • CVE-2026-935200 days apartX.Org Server XKB ChangeKeycodeRange Heap Out-of-Bounds Write
    31Monitor
  • CVE-2026-935210 days apartX.Org Server RandR ChangeProviderProperty Heap Buffer Overflow
    31Monitor
  • CVE-2026-935220 days apartX.Org Server Glamor CopyArea Heap Buffer Overflow
    31Monitor
  • CVE-2026-935230 days apartX.Org Server XInput2 PassiveUngrabDevice Out-of-Bounds Write
    31Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
low · data can be read
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
High
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
Low
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-122 · Heap-based Buffer Overflow

CVSS vector

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Exploit maturity— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records