CVE-2026-43482

CVEs › CVE-2026-43482

Description

In the Linux kernel, the following vulnerability has been resolved: sched_ext: Disable preemption between scx_claim_exit() and kicking helper work scx_claim_exit() atomically sets exit_kind, which prevents scx_error() from triggering further error handling. After claiming exit, the caller must kick the helper kthread work which initiates bypass mode and teardown. If the calling task gets preempted between claiming exit and kicking the helper work, and the BPF scheduler fails to schedule it back (since error handling is now disabled), the helper work is never queued, bypass mode never activates, tasks stop being dispatched, and the system wedges. Disable preemption across scx_claim_exit() and the subsequent work kicking in all callers - scx_disable() and scx_vexit(). Add lockdep_assert_preemption_disabled() to scx_claim_exit() to enforce the requirement.

Overview

State: PUBLISHED
Assigner (CNA): Linux
CVSS severity: high
CVSS score: 7.1 / 10
CVSS vector: AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
Effective score: 7.1 / 10 HIGH source: CNA overview
CWE(s): —
Reserved: 2026-05-01
Published: 2026-05-13 17:08 UTC
Last updated: 2026-05-13 17:08 UTC
Source: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/43xxx/CVE-2026-43482.json
Linked Threat: CVE-2026-43482 — CVE-2026-43482

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published: 2026-05-13 16:16:51 UTC
NVD last modified: 2026-05-13 16:16:51 UTC
EPSS score: 0.0002 (probability of exploitation in next 30 days)
EPSS percentile: 6.85% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24

NVD / KEV / EPSS data refreshed 2026-05-25 08:51 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID: EUVD-2026-30018
Assigner: Linux
Published: May 13, 2026, 3:08:29 PM
Updated: May 13, 2026, 3:08:29 PM
EUVD base score: 0.0 / 10
EUVD-reported EPSS: 0.0200
Vendors: Linux
Products: Linux (f0e1a0643a59bf1f922fa209cec86a170b784f3f <41423912f7ac7494ccd6eef411227b4efce740e0)

Linux (patch: 7.0)

Linux (patch: 6.18.20)

Linux (patch: 6.12.78)

Linux (patch: 0)

Linux (f0e1a0643a59bf1f922fa209cec86a170b784f3f <522acaae34aa7e05859260056b39c7c030592a0c)

Linux (patch: 6.19.9)

Linux (6.12)

Linux (f0e1a0643a59bf1f922fa209cec86a170b784f3f <83236b2e43dba00bee5b82eb5758816b1a674f6a)

Linux (f0e1a0643a59bf1f922fa209cec86a170b784f3f <5131dbec2c10961b34f844bc30b400c3fa0bcc72)

ENISA description: In the Linux kernel, the following vulnerability has been resolved: sched_ext: Disable preemption between scx_claim_exit() and kicking helper work scx_claim_exit() atomically sets exit_kind, which prevents scx_error() from triggering further error handling. After claiming exit, the caller must kick the helper kthread work which initiates bypass mode and teardown. If the calling task gets preempted between claiming exit and kicking the helper work, and the BPF scheduler fails to schedule it back (since error handling is now disabled), the helper work is never queued, bypass mode never activates, tasks stop being dispatched, and the system wedges. Disable preemption across scx_claim_exit() and the subsequent work kicking in all callers - scx_disable() and scx_vexit(). Add lockdep_assert_preemption_disabled() to scx_claim_exit() to enforce the requirement.

EUVD references (4)

Affected products (2)

Vendor	Product	Versions	Platforms
Linux	Linux	`f0e1a0643a59bf1f922fa209cec86a170b784f3f` (affected), `f0e1a0643a59bf1f922fa209cec86a170b784f3f` (affected), `f0e1a0643a59bf1f922fa209cec86a170b784f3f` (affected), `f0e1a0643a59bf1f922fa209cec86a170b784f3f` (affected)	—
Linux	Linux	`6.12` (affected), `0` (unaffected), `6.12.78` (unaffected), `6.18.20` (unaffected), `6.19.9` (unaffected), `7.0` (unaffected)	—

Vendor references (4)

References embedded in the original CVE record by the assigning CNA.

MITRE references (4) cveawg.mitre.org

Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.

Web references (3)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

https://nvd.nist.gov/vuln/detail/CVE-2026-43482 tenable:nvd.nist.gov
https://www.cve.org/CVERecord?id=CVE-2026-43482 tenable:www.cve.org
https://www.first.org/epss/ tenable:www.first.org

NVD-tagged references (4)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

https://git.kernel.org/stable/c/41423912f7ac7494ccd6eef411227b4efce740e0 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/5131dbec2c10961b34f844bc30b400c3fa0bcc72 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/522acaae34aa7e05859260056b39c7c030592a0c 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/83236b2e43dba00bee5b82eb5758816b1a674f6a 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Remediations (16)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

April 2026 Critical Patch Update Released | security - Oracle Blogs

web:blogs.oracle.com

For more information about the Critical Patch Update program, see the security vulnerability remediation practices page located on the Oracle Trust Center.

2026-05-23 20:55 UTC
Microsoft Patch Tuesday for April 2026 - Snort Rule and Prominent ...

web:blog.talosintelligence.com

Microsoft has released its monthly security update for April 2026 , which includes 165 vulnerabilities affecting a wide range of products, including eight Microsoft marked as "critical." CVE - 2026 -23666 is a critical Denial of Service (DoS) vulnerability that affects the .NET framework. Successful exploitation could allow the attacker to deny service over the network. CVE - 2026 -32157 is a ...

2026-05-23 20:55 UTC
CISA Warns of Exploited Microsoft Defender 0-Day Flaws

web:cyberpress.org

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two actively exploited Microsoft Defender vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, issuing an urgent remediation directive for federal agencies with a due date of June 3, 2026 .

2026-05-23 20:55 UTC
Security Update Guide - Microsoft

web:portal.msrc.microsoft.com

The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

2026-05-23 20:55 UTC
KB5083252 - Description of the security update for SQL Server 2022 CU24 ...

web:support.microsoft.com

Summary Improvements and fixes included in this update How to obtain and install the update How to obtain or download the latest cumulative update package for Linux More information File information Information about protection and security Summary This security update contains fixes and resolves vulnerabilities. To learn more about the vulnerabilities, see the following security advisories ...

2026-05-23 20:55 UTC
Microsoft April 2026 Patch Tuesday fixes 167 flaws, 2 zero-days

web:www.bleepingcomputer.com

Today is Microsoft's April 2026 Patch Tuesday with security updates for 167 flaws, including 2 zero-day vulnerabilities.

2026-05-23 20:55 UTC
Critical Patches Issued for Microsoft Products, April 14, 2026

web:www.cisecurity.org

<p>Multiple vulnerabilities have been discovered in Microsoft products, the most severe of which could allow for remote code execution. Successful exploitation of the most severe of these vulnerabilities could result in an attacker gaining the same privileges as the logged-on user. Depending on the privileges associated with the user, an attacker could then install programs; view, change, or ...

2026-05-23 20:55 UTC
April 2026 Patch Tuesday: Updates and Analysis | CrowdStrike

web:www.crowdstrike.com

Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.

2026-05-23 20:55 UTC
2 New Microsoft Defender Zero-Days Exploited—Patch Now ... - Forbes

web:www.forbes.com

Microsoft has confirmed an emergency security update as CISA warns that two new Defender zero-days are being exploited by attackers.

2026-05-23 20:55 UTC
Oracle Critical Patch Update Advisory - April 2026

web:www.oracle.com

This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

2026-05-23 20:55 UTC
Windows Kerberos RC4 deprecation: what will break in Active ... - 4sysops

web:4sysops.com

Starting in April 2026 , Windows updates will change the default Kerberos ticket issuance behavior to AES-SHA1 for accounts without explicit encryption settings, while RC4 can still be used where explicitly enabled. This change, driven by CVE - 2026 -20833, affects every Windows Server environment where service accounts or devices still rely on RC4. Any service account, NAS device, or legacy ...

2026-05-26 02:53 UTC
RHSB-2026-003 Networking subsystem Privilege Escalation - Linux Kernel ...

web:access.redhat.com

The mitigation methods below address both vulnerabilities that affect Red Hat products — CVE - 2026 -43284 (IPsec ESP) and CVE - 2026 -46300 (XFRM ESP-in-TCP). CVE - 2026 -43500 (rxrpc) does not affect Red Hat products and requires no mitigation .

2026-05-26 02:53 UTC
Security Advisory Bulletin 064 | Ubiquiti Community

web:community.ui.com

Published: May 21, 2026 Updated: May 22, 2026 Version: 1.1 Revision: 1.1 Summary 1 of 5 A malicious actor with access to the network and high privileges could exploit an Improper Input Validation vulnerability found in UniFi OS devices to execute a Command Injection. Affected Products: UniFi OS Server (Version 5.0.6 and earlier) Mitigation : Update your UniFi OS Server to Version 5.0.8 or later ...

2026-05-26 02:53 UTC
Nvd - Cve-2026-43512

web:nvd.nist.gov

Official websites use .gov A .gov website belongs to an official government organization in the United States.

2026-05-26 02:53 UTC
Microsoft Patches 138 Vulnerabilities, Including DNS and Netlogon RCE Flaws

web:thehackernews.com

Microsoft patched 138 flaws, including 30 Critical bugs, as AI discovery expands Patch Tuesday risk.

2026-05-26 02:53 UTC
Dirty Frag Linux kernel local privilege escalation vulnerability ...

web:ubuntu.com

The vulnerability fix will be distributed through the Linux kernel image packages. A mitigation which disables the affected modules can be applied according to the instructions below.

2026-05-26 02:53 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-43482.json.

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          "programFiles": [
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        }
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