CVE-2026-74575

Kernel memory corruption via disconnect workqueue race

Published Aug 15, 2026 · Updated Aug 15, 2026

Use-after-free in the Linux kernel Thunderbolt XDomain driver allows attackers to corrupt kernel memory through crafted peer requests. The request handler queues delayed state or property work after teardown has canceled it, so the work dereferences the freed XDomain object. The attack requires a connected Thunderbolt/USB4 XDomain peer and results in kernel panic, memory disclosure, or kernel code execution.

CVSS severity8.8
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel Thunderbolt XDomain driver allows attackers to corrupt kernel memory through crafted peer requests. The request handler queues delayed state or property work after teardown has canceled it, so the work dereferences the freed XDomain object. The attack requires a connected Thunderbolt/USB4 XDomain peer and results in kernel panic, memory disclosure, or kernel code execution.

The record

CVE
CVE-2026-74575
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-364, T1200
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.2
  2. Affected versionversion=559c1e1e013437bf190469efbcbd8bc803285853 <2aa2cde2cc79a79d8ea4a15be9f4a67fc528ae91
  3. Affected versionversion=559c1e1e013437bf190469efbcbd8bc803285853 <2c5d2d3c3f70cde2565d7b279b544893a2035842
  4. Affected versionversion=559c1e1e013437bf190469efbcbd8bc803285853 <33c0ee18cf8665c974b00f4e0ba769fbc07efe10
  5. Affected versionversion=559c1e1e013437bf190469efbcbd8bc803285853 <54a62153c765cd24239cde1f2633f2a2fd005368
  6. Affected versionversion=559c1e1e013437bf190469efbcbd8bc803285853 <91b40862a02000f490b63f1d315be3ee31e83871

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.2; version=559c1e1e013437bf190469efbcbd8bc803285853 <2aa2cde2cc79a79d8ea4a15be9f4a67fc528ae91; version=559c1e1e013437bf190469efbcbd8bc803285853 <2c5d2d3c3f70cde2565d7b279b544893a2035842; version=559c1e1e013437bf190469efbcbd8bc803285853 <33c0ee18cf8665c974b00f4e0ba769fbc07efe10; version=559c1e1e013437bf190469efbcbd8bc803285853 <54a62153c765cd24239cde1f2633f2a2fd005368; version=559c1e1e013437bf190469efbcbd8bc803285853 <91b40862a02000f490b63f1d315be3ee31e83871

Published CVSS scores

7.0Red HatCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8Linux CNACVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-364Signal Handler Race Condition
T1200Hardware Additions

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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