X.Org Foundation Xorg X11 Server GLX buffer overflow

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
9.9$0-$5k0.00

Summaryinfo

A vulnerability classified as very critical has been found in X.Org Foundation Xorg X11 Server. Affected by this vulnerability is an unknown functionality of the component GLX. This manipulation causes buffer overflow. This vulnerability is registered as CVE-2026-93517. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability classified as very critical was found in X.Org Foundation Xorg X11 Server (version now known). Affected by this vulnerability is some unknown processing of the component GLX. The manipulation with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability.

This vulnerability is known as CVE-2026-93517. The exploitation appears to be easy. The attack can be launched remotely. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/19/2026).

The vulnerability scanner Nessus provides a plugin with the ID 367210 (RHEL 9 : xorg-x11-server (RHSA-2026:84574)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (367210). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Vendor

Name

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 9.9

VulDB Base Score: 9.9
VulDB Temp Score: 9.9
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 367210
Nessus Name: RHEL 9 : xorg-x11-server (RHSA-2026:84574)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/09/2026 Advisory disclosed
10/09/2026 +0 days VulDB entry created
10/19/2026 +10 days VulDB entry last update

Sourcesinfo

Status: Not defined

CVE: CVE-2026-93517 (🔒)

GCVE (CVE): GCVE-0-2026-93517
GCVE (VulDB): GCVE-100-415855

Entryinfo

Created: 10/09/2026 14:20
Updated: 10/19/2026 16:57
Changes: 10/09/2026 14:20 (48), 10/19/2026 16:57 (2)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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