MediumCVE-2026-74580

Linux Kernel: security vulnerability (CVE-2026-74580)

Published 21.08.2026Last modified 29.10.2026Sources: SUSE, Ubuntu, Debian LTS, Debian, Red Hat, CVE.org, Msrc Update Guide, BSI

Public exploit

What is affected, what to do

An exploit is publicly available. Update Linux Kernel to version 5.10.265, Linux Kernel to version 5.15.216, Linux Kernel to version 6.1.183.

Affected: Linux Kernel lt 4.11..5.10.265
Linux Kernel lt 5.11..5.15.216
Linux Kernel lt 5.16..6.1.183
Linux Kernel lt 6.2..6.6.152
Linux Kernel lt 6.7..6.12.104
Linux Kernel lt 6.13..6.18.45
Linux Kernel lt 6.19..7.1.9
Fixed in: Linux Kernel 5.10.265
Linux Kernel 5.15.216
Linux Kernel 6.1.183
Linux Kernel 6.6.152
Linux Kernel 6.12.104
Linux Kernel 6.18.45
Linux Kernel 7.1.9
Linux Kernel 7.2

Not sure whether and how you are affected? Ask a question about this vulnerability

Metrics

6.4

Priority

XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

Source: Vendor (CNA), CVSS v3

6.4

CVSS v3

Severity Medium on the scale from 0 to 10.

Source: SUSE, Ubuntu, Debian LTS, Debian, Red Hat, CVE.org, Msrc Update Guide, BSI

0.4 %

EPSS score

Low — model estimates < 1% exploitation likelihood.

Source: FIRST EPSS, percentile 35.1

Show all metrics

Severity: Medium
Priority (0–325) The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first? Read in glossary: 77.69 Methodology
Exploit maturity An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack. Read in glossary: PoC (publicly reported)
XIEM Effective CVSS XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command. Read in glossary: 6.4 Methodology
CVSS v3 CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions. Read in glossary: 6.4
EPSS score The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“. Read in glossary: 0.4 %; Low — model estimates < 1% exploitation likelihood.
EPSS percentile The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking. Read in glossary: 35.1; Elevated — this CVE ranks above at least 10% of all CVEs scored today.
KEV status The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching. Read in glossary: —
Published: 21.08.2026
CISA assessment (SSVC): Exploitation: proof of concept · not automatable · Technical impact: total; Source: CISA Vulnrichment, as of 28 October 2026

Detection rules

No NEOSEC detection rule is available for this vulnerability yet.

Classification under NIS2 and CRA

Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

NIS2 NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management. Read in glossary: Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.
CRA The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates. Read in glossary: From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
ISO/IEC 27001 ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security. Read in glossary: Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

Description

A flaw was found in the Linux kernel's vhost subsystem. A local attacker could exploit this vulnerability by reconfiguring a virtual ring (vring) using specific ioctl commands while a device Input/Output Memory Management Unit (IOTLB) is attached. This improper handling of the vring metadata cache can lead to out-of-bounds memory access, potentially resulting in information disclosure, data corruption, or a denial of service.

Source: suse_csaf, Ubuntu Security Notices, Debian LTS Advisories, Debian Security Advisories, redhat_csaf, cvelistv5, NVD (NIST), Microsoft Security Update Guide, BSI WID Portal, BSI CSAF

Affected products

The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

Affected products
		Affected versions	Fixed in
Linux	Linux	`6.13 – < 6.18.45` `5.11 – < 5.15.216` `5.16 – < 6.1.183` `6.19 – < 7.1.9` `6.7 – < 6.12.104` `6.2 – < 6.6.152` `4.11 – < 5.10.265` `—`	`6.18.45` `5.15.216` `6.1.183` `7.1.9` `6.12.104` `6.6.152` `5.10.265` `7.2`

Vendors and products

Affected operating systems

Affected operating systems

Linux	debian	linux	`bookworm`
Linux	debian	linux	`trixie`
Linux	debian	linux-6.12	`bookworm`
Linux	ubuntu	linux-gcp-5.15	`focal`

Public exploit references

Publicly reported proof-of-concepts, exploit modules and detection templates for this vulnerability. NEOSEC links to the original sources only and does not provide any exploit code.

Public exploit references

GitHub	YounesHfa/CVE-2026-74580 (opens in a new tab)github.com	PoC (publicly reported)reported, not verified	—
PoC-in-GitHub (nomi-sec)	linux-kernel-cve-2026-74580-vghost (opens in a new tab)github.com	PoC (publicly reported)reported, not verified	14.10.2026

References & sources

git.kernel.orgstable/c/5224bd37e37d36076a550d99b2aebba33939fd95
git.kernel.orgstable/c/54617e9119be2eb728ecdd8d977b99c99d4c498a
git.kernel.orgstable/c/13fa6f32a56a386a82bd7451644c494beed034af
git.kernel.orgstable/c/cf363a7a02ce132ef1f58084fdb13e1a3b7da7e7
git.kernel.orgstable/c/6fa3e9b1fe856259555a7e22f3f3082e7827fd9b
git.kernel.orgstable/c/f1e21108e3ddfcce62f6cad4ebd7b5674543c9e6
git.kernel.orgstable/c/b70ebe0bba254e093dd5fd4c0c170941ce83eb85
git.kernel.orgstable/c/de845981da67a6b049080c87e605130b0c30adc5
openwall.comlists/oss-security/2026/10/14/2
github.comYounesHfa/CVE-2026-74580Exploit

Changes to this CVE

Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).

29.10.2026Record modifiedCISA ADP

CISA assessment (SSVC): exploitation: proof of concept, automatable: no

Show 2 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
SSVC assessment	removed	{"id":"CVE-2026-74580","role":"CISA Coordinator","options":[{"exploitation":"poc"},{"automatable":"no"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-10-28T19:08:13.521018Z"}	—
SSVC assessment	added	—	{"id":"CVE-2026-74580","role":"CISA Coordinator","options":[{"exploitation":"poc"},{"automatable":"no"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-10-28T00:00:00+00:00"}

Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

28.10.2026Record modifiedCISA ADP

CISA assessment (SSVC): exploitation: proof of concept, automatable: no

New references:

https://github.com/YounesHfa/CVE-2026-74580

Show 3 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://github.com/YounesHfa/CVE-2026-74580
SSVC assessment	removed	{"id":"CVE-2026-74580","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T19:01:06.371046Z"}	—
SSVC assessment	added	—	{"id":"CVE-2026-74580","role":"CISA Coordinator","options":[{"exploitation":"poc"},{"automatable":"no"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-10-28T19:08:13.521018Z"}

Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

16.10.2026Record modifiedCISA ADP

CISA assessment (SSVC): exploitation: none known, automatable: no

Show the original change

Individual changes of this event as published by NVD
Type	Action	Before	After
SSVC assessment	added	—	{"id":"CVE-2026-74580","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T19:01:06.371046Z"}

Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

14.10.2026Record modifiedLinux

New references:

and 4 more references

Show 16 original changes

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	https://git.kernel.org/stable/c/13fa6f32a56a386a82bd7451644c494beed034af
Reference	added	—	https://git.kernel.org/stable/c/5224bd37e37d36076a550d99b2aebba33939fd95
Reference	added	—	https://git.kernel.org/stable/c/54617e9119be2eb728ecdd8d977b99c99d4c498a
Reference	added	—	https://git.kernel.org/stable/c/6fa3e9b1fe856259555a7e22f3f3082e7827fd9b
Reference	added	—	https://git.kernel.org/stable/c/b70ebe0bba254e093dd5fd4c0c170941ce83eb85
Reference	added	—	https://git.kernel.org/stable/c/cf363a7a02ce132ef1f58084fdb13e1a3b7da7e7
Reference	added	—	https://git.kernel.org/stable/c/de845981da67a6b049080c87e605130b0c30adc5
Reference	added	—	https://git.kernel.org/stable/c/f1e21108e3ddfcce62f6cad4ebd7b5674543c9e6
Reference	removed	https://git.kernel.org/stable/c/13fa6f32a56a386a82bd7451644c494beed034af	—
Reference	removed	https://git.kernel.org/stable/c/5224bd37e37d36076a550d99b2aebba33939fd95	—
Reference	removed	https://git.kernel.org/stable/c/54617e9119be2eb728ecdd8d977b99c99d4c498a	—
Reference	removed	https://git.kernel.org/stable/c/6fa3e9b1fe856259555a7e22f3f3082e7827fd9b	—
Reference	removed	https://git.kernel.org/stable/c/b70ebe0bba254e093dd5fd4c0c170941ce83eb85	—
Reference	removed	https://git.kernel.org/stable/c/cf363a7a02ce132ef1f58084fdb13e1a3b7da7e7	—
Reference	removed	https://git.kernel.org/stable/c/de845981da67a6b049080c87e605130b0c30adc5	—
Reference	removed	https://git.kernel.org/stable/c/f1e21108e3ddfcce62f6cad4ebd7b5674543c9e6	—

Source identifier: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

14.10.2026Record modifiedCVE Program
New references:
- http://www.openwall.com/lists/oss-security/2026/10/14/2
Show the original change
Individual changes of this event as published by NVD
Type Action Before After
Reference added
—
http://www.openwall.com/lists/oss-security/2026/10/14/2
Source identifier: af854a3a-2127-422b-91ae-364da2661108

Individual changes of this event as published by NVD
Type	Action	Before	After
Reference	added	—	http://www.openwall.com/lists/oss-security/2026/10/14/2

Show one older change

25.08.2026Record modifiedLinux
CVSS V3.1: AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Show the original change
Individual changes of this event as published by NVD
Type Action Before After
CVSS added
—
AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source identifier: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Individual changes of this event as published by NVD
Type	Action	Before	After
CVSS	added	—	AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

One NVD translation into another language is hidden.

Linked advisories

AI-Found Linux Kernel Flaw Gives Local Users Root, and Can Break a Guest Out to the HostThe Hacker News14.10.2026

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