Is there a patch available for CVE-2026-99244?

Yes, a patch is available for CVE-2026-99244. Update the affected software to the latest version immediately.

Linux CVE-2026-99244

EUVD-2026-115774

2026-11-03 Linux

GHSA-7cwf-57xm-qrxg

Information Disclosure 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.

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AnalysisCVE.org

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

pid_namespace: prevent TIF_NOTIFY_SIGNAL from interrupting the reaper

Since commit 7fea700e04bd ("zap_pid_ns_processes: clear TIF_NOTIFY_SIGNAL along with TIF_SIGPENDING") zap_pid_ns_processes() clears TIF_NOTIFY_SIGNAL before every kernel_wait4() call. Otherwise kernel_wait4() doesn't sleep and returns -ERESTARTSYS if signal_pending() is true and the reaper busy-waits.

But clearing TIF_NOTIFY_SIGNAL doesn't fix it. It can get raised again. For example, klp_send_signals() sets it raw against any task that hasn't transitioned yet. And it keeps sending it until the livepatch finishes.

The sleep loop waiting for pid_allocated to drop has the same problem and it doesn't even clear anything. So a schedule() in TASK_INTERRUPTIBLE returns immediately.

Use a no_notify_signal guard. signal_pending() will ignore TIF_NOTIFY_SIGNAL and the pid namespace reaper sleeps until a child exits or free_pid() wakes it.

Affected VersionsENISA

Linux 7fea700e04bd3f424c2d836e98425782f97b494e <70178691c467c8f9f722765299fd8524c3121a35

Linux patch: 6.18.60

Linux patch: 6.1.191

Linux patch: 0

Linux 6.1.95 <6.1.191

Linux 6.6.35 <6.6.161

Linux 09ab5b424b17cfe633db58bb2f9edbaf9484cf20

Linux patch: 6.12.115

Linux edd2754a62bee8d97b4808a15de024f66a1ddccf <2c20ace1698d03a23467351be1d281e89b36ade3

Linux 3466abafa9f4f81a869da828e52a12f693175ec2 <9ab0324f4868eeb20c63f063a1e5bc01d5539212

Linux 5.15.162 <5.16

Linux 8e69e589f233ca2c9631f5af2b94f95dfc2ba804

Linux patch: 7.2.14

Linux 82c7acf9a12c9b4e4b0aba531de82b4e39a345c8

Linux 7fea700e04bd3f424c2d836e98425782f97b494e <30b274508c743f243c82904954c4e416d7143d4c

Linux 5.10.221 <5.11

Linux 6.9.6 <6.10

Linux 6.10

Linux patch: 6.6.161

Linux 7fea700e04bd3f424c2d836e98425782f97b494e <3d15ac36ce174477efa5365e424dbd47950fd2b9

Linux 7fea700e04bd3f424c2d836e98425782f97b494e <f46cd8241d9b83f2279cc0db3e9d3e181b548a59

Linux patch: 7.3.1

Affected Packages

euvd linux fix: 5.11, 5.16, 6.1.191, 6.6.161, 6.10

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 - 12:16 EUVD

CVE Published

Nov 03, 2026 - 11:15 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

Information Disclosure MEDIUM

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