X.Org Server RandR ChangeProviderProperty Heap Buffer Overflow
CVSS score
7.8
EPSS probability
—
Risk score
0.8
Published
31 min ago
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Vulnerability description
DayBreach AI Explanation
Verified against sourcesSources read
1
Source agreement
Tam uyum
Evidence confidence
%55
Short explanation
CVE-2026-93521 is a buffer overflow vulnerability in X.Org X Server and XWayland that allows authenticated X clients to crash or execute code within the X server context.
This vulnerability is critical because it can lead to arbitrary code execution within the X server context, compromising system confidentiality, integrity, and availability.
What should be done?
- Review the provided patch references
- Follow vendor advisories
Chain of evidence and sources
CVE-2026-93521, X.Org X Server ve XWayland bileşenlerinde yığın tabanlı tampon taşmasına neden olur.
Kimliği doğrulanmış X istemcileri, çökme yaratmak veya kod çalıştırmak için bu açığı istismar edebilir.
Show the technical text from the sources
A buffer overflow in RandR ChangeProviderProperty requests in X.Org X Server before 2.1.25 and XWayland before 24.4.14 could be used by authenticated X clients to crash or execute code within the X server context.
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE: CWE-122
This explanation was compiled automatically from the source records. Scores, active exploitation, patch and exploit status come straight from the sources.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-93521 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | x.org | xorg-x11-server | View |
| 2 | x.org | xwayland | View |
| 3 | Ubuntu | xorg (xenial) | View |
| 4 | Ubuntu | xorg (bionic) | View |
| 5 | Ubuntu | xorg (focal) | View |
| 6 | Ubuntu | xorg (jammy) | View |
| 7 | Ubuntu | xorg (noble) | View |
| 8 | Ubuntu | xorg (resolute) | View |
| 9 | Ubuntu | xorg (stonking) | View |
| 10 | Ubuntu | xorg (upstream) | View |
| 11 | Ubuntu | xorg-server (trusty) | View |
| 12 | Ubuntu | xorg-server (xenial) | View |
| 13 | Ubuntu | xorg-server (bionic) | View |
| 14 | Ubuntu | xorg-server (focal) | View |
| 15 | Ubuntu | xorg-server (jammy) | View |
| 16 | Ubuntu | xorg-server (noble) | View |
| 17 | Ubuntu | xorg-server (resolute) | View |
| 18 | Ubuntu | xorg-server (stonking) | View |
| 19 | Ubuntu | xorg-server (upstream) | View |
| 20 | Ubuntu | xwayland (jammy) | View |
| 21 | Ubuntu | xwayland (noble) | View |
| 22 | Ubuntu | xwayland (resolute) | View |
| 23 | Ubuntu | xwayland (stonking) | View |
| 24 | Ubuntu | xwayland (upstream) | View |
| 25 | Ubuntu | xorg-server-hwe-16.04 (xenial) | View |
| 26 | Ubuntu | xorg-server-hwe-16.04 (jammy) | View |
| 27 | Ubuntu | xorg-server-hwe-16.04 (noble) | View |
| 28 | Ubuntu | xorg-server-hwe-16.04 (resolute) | View |
| 29 | Ubuntu | xorg-server-hwe-16.04 (stonking) | View |
| 30 | Ubuntu | xorg-server-hwe-16.04 (upstream) | View |
| 31 | Ubuntu | xorg-server-hwe-18.04 (bionic) | View |
| 32 | Ubuntu | xorg-server-hwe-18.04 (jammy) | View |
| 33 | Ubuntu | xorg-server-hwe-18.04 (noble) | View |
| 34 | Ubuntu | xorg-server-hwe-18.04 (resolute) | View |
| 35 | Ubuntu | xorg-server-hwe-18.04 (stonking) | View |
| 36 | Ubuntu | xorg-server-hwe-18.04 (upstream) | View |
| 37 | Ubuntu | xorg-hwe-16.04 (xenial) | View |
| 38 | Ubuntu | xorg-hwe-16.04 (jammy) | View |
| 39 | Ubuntu | xorg-hwe-16.04 (noble) | View |
| 40 | Ubuntu | xorg-hwe-16.04 (resolute) | View |
| 41 | Ubuntu | xorg-hwe-16.04 (stonking) | View |
| 42 | Ubuntu | xorg-hwe-16.04 (upstream) | View |
| 43 | Ubuntu | xorg-hwe-18.04 (bionic) | View |
| 44 | Ubuntu | xorg-hwe-18.04 (jammy) | View |
| 45 | Ubuntu | xorg-hwe-18.04 (noble) | View |
| 46 | Ubuntu | xorg-hwe-18.04 (resolute) | View |
| 47 | Ubuntu | xorg-hwe-18.04 (stonking) | View |
| 48 | Ubuntu | xorg-hwe-18.04 (upstream) | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 7.8 | CVSS V3_1 | HIGH | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H | CVE CNA |
Patch and Remediation Guide
Solution & Remediation Advisory
2 düzeltme kanıtı bulundu; en az 18 ürün veya sürüm hâlâ etkileniyor ya da inceleniyor.
Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-93521 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-93521 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
Similar Vulnerabilities
Get this vulnerability through the API
Affected products, version ranges, exploitation status and patch information in a single request, with a free key.
curl -H "x-api-key: $DAYBREACH_API_KEY" \ "https://api.daybreach.dev/api/v1/intel/cves/CVE-2026-93521"