Is there a patch available for EUVD-2026-108856?

Yes, a patch is available for EUVD-2026-108856. Update the affected software to the latest version immediately.

Linux EUVD-2026-108856

| CVE-2026-98900

2026-10-23 Linux

GHSA-mwrq-hx54-3h97

Information Disclosure Linux

View

Monitor Track and reassess. Why: No CVSS yet + weak signal (CWE or non-zero EPSS).

Patch available 0.2% exploitation probability (EPSS)

Get an e-mail when this CVE is exploited, patched or re-scored. Free account.

Alert me

AnalysisCVE.org

In the Linux kernel, the following vulnerability has been resolved:

xen/gntalloc: validate grant count before allocation

gntalloc_ioctl_alloc() allocates the grant-id array before checking whether the requested count fits within the global grant limit. Counts above that limit cannot succeed, so reject them before the user-controlled allocation reaches kcalloc().

Use a subtraction-based check while holding gref_mutex so adding the requested count cannot wrap. Also cast the count before advancing the per-file index so the page-size multiplication is performed in 64-bit arithmetic.

Affected VersionsENISA

Linux patch: 6.6.158

Linux 0 <6.18.53

Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <231542f4e43cf9837cb520664545e85fbe666b7b

Linux patch: 7.2

Linux 0 <6.6.158

Linux patch: 5.15.222

Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <720554c04acba80018ded069d3e0984bebaee891

Linux patch: 6.18.53

Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e2806390aa1c4d5b3f7a68f10a56ae12c71c00d8

Linux 0 <5.10.271

Linux patch: 6.1.189

Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2299822f3f466b5dcad2377bf63986199f881a6b

Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <641de086a05f349de7fc548612432bc2fed721ca

Linux 0 <5.15.222

Linux 0 <6.1.189

Linux patch: 6.12.111

Linux 0 <6.12.111

Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <84d5727cef8eb9c8a28210ad248f1c70b223b065

Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <71a0cf87e19fb35c4292ca88985e376e613c900a

Linux patch: 5.10.271

Affected Packages

euvd linux fix: 5.10.271, 5.15.222, 6.1.189, 6.6.158, 6.12.111, 6.18.53

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Know when the next one hits your stack

Watch products and get an email when something new is published
Check this CVE against your own stack and servers
Exploit and PoC references, threat intelligence from 22 sources

Continue with Google Continue with GitHub

No credit card · 7-day full trial

Lifecycle Timeline

Patch available

Oct 23, 2026 - 13:17 EUVD

CVE Published

Oct 23, 2026 - 11:54 cve.org

UNKNOWN (no severity yet)

Threat Intelligence Overview

EPSS Score

0.2%

Top 89% exploitable

Data Quality

4 sources

Confidence: Medium

EUVD

CVE.org

EPSS MSRC

VulDB

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity Not scored yet

CISA KEV No

Public POC No

EPSS 0.2%

Patch available Yes

Active threat No

Deciding rule

No CVSS yet + weak signal (CWE or non-zero EPSS)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

Attack Technique

Information Disclosure MEDIUM

Information disclosure occurs when an application unintentionally exposes sensitive data that aids attackers in reconnaissance or directly compromises security.