Is there a patch available for CVE-2026-99267?

Yes, a patch is available for CVE-2026-99267. Update the affected software to the latest version immediately.

Linux CVE-2026-99267

EUVD-2026-115792

2026-11-03 Linux

GHSA-x9qg-p3cx-xhhv

Buffer Overflow Linux

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Awaiting Data No severity or threat signals available yet. Label will update when CVSS score is published or threat intelligence arrives.

Patch available

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AnalysisCVE.org

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

io_uring/napi: make stale entries time out after 60s

With dynamic tracking a NAPI id that hasn't been seen for a minute is meant to be dropped from the list the ring busy polls. The timeout is added to jiffies, but it is defined as 60 * SEC_CONVERSION, and SEC_CONVERSION isn't the number of jiffies in a second. It is the internal factor of __timespec64_to_jiffies(), HZ scaled up by SEC_JIFFIE_SC bits. For HZ=1000 that is 1000 << 22, which puts the timeout at about eight years. On 32-bit the multiplication overflows.

So entries are never removed, and every id that a socket of the ring ever had keeps being polled on each wait.

Affected VersionsENISA

Linux patch: 7.2.14

Linux 8d0c12a80cdeb80d5e0510e96d38fe551ed8e9b5 <3fe820cf35f83534eab72ea73f1a83cfd3cd8079

Linux patch: 6.12.115

Linux 6.9

Linux 8d0c12a80cdeb80d5e0510e96d38fe551ed8e9b5 <18c373f446068972788158c8c7de6e849b04ed98

Linux patch: 6.18.60

Linux patch: 0

Linux 8d0c12a80cdeb80d5e0510e96d38fe551ed8e9b5 <981621d6eadcd232d4ea748aaeb046337f10d3c1

Affected Packages

euvd linux no fix

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 1 package in euvd

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Exploit and PoC references, threat intelligence from 22 sources

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Lifecycle Timeline

Patch available

Nov 03, 2026 - 13:16 EUVD

CVE Published

Nov 03, 2026 - 11:48 cve.org

UNKNOWN (no severity yet)

Threat Intelligence Overview

Data Quality

1 sources

Confidence: Low

EUVD

CVE.org

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 N/A

Patch available Yes

Active threat No

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.

Awaiting Data No severity or threat signals available yet. Label will update when CVSS score is published or threat intelligence arrives.

Attack Technique

Buffer Overflow HIGH

A buffer overflow occurs when a program writes more data to a memory buffer than it was allocated to hold, causing the excess data to spill into adjacent memory regions.