CVE-2024-26659

Kernel memory corruption via premature TD release

Published Apr 2, 2024 · Updated Aug 5, 2026

Out-of-bounds write in the Linux xHCI driver allows local users to corrupt kernel memory via isochronous transfer errors. In drivers/usb/host/xhci-ring.c, early Babble or Buffer Overrun handling prematurely releases a multi-TRB transfer descriptor, allowing outstanding TRBs to be freed or overwritten before final completion. Reachability requires low-privileged local access and an xHCI isochronous transfer error; the published mechanism establishes no remote path.

CVSS severity7.8
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

Out-of-bounds write in the Linux xHCI driver allows local users to corrupt kernel memory via isochronous transfer errors. In drivers/usb/host/xhci-ring.c, early Babble or Buffer Overrun handling prematurely releases a multi-TRB transfer descriptor, allowing outstanding TRBs to be freed or overwritten before final completion. Reachability requires low-privileged local access and an xHCI isochronous transfer error; the published mechanism establishes no remote path.

The record

CVE
CVE-2024-26659
Published
Apr 2, 2024
Updated
Aug 5, 2026
Vendor
Siemens
Product
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
Classifications
CWE-787
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 2, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=0 <*

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Siemens · SIMATIC S7-1500 TM MFP - GNU/Linux subsystemversion=0 <*
The Linux Kernel Organization · Linuxversion=04e51901dd44f40a5a385ced897f6bca87d5f40a <2aa7bcfdbb46241c701811bbc0d64d7884e3346c; version=04e51901dd44f40a5a385ced897f6bca87d5f40a <2e3ec80ea7ba58bbb210e83b5a0afefee7c171d3; version=04e51901dd44f40a5a385ced897f6bca87d5f40a <418456c0ce56209610523f21734c5612ee634134; version=04e51901dd44f40a5a385ced897f6bca87d5f40a <696e4112e5c1ee61996198f0ebb6ca3fab55166e; version=04e51901dd44f40a5a385ced897f6bca87d5f40a <7c4650ded49e5b88929ecbbb631efb8b0838e811; version=04e51901dd44f40a5a385ced897f6bca87d5f40a <f5e7ffa9269a448a720e21f1ed1384d118298c97; version=2.6.36

Published CVSS scores

4.1Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
7.8Linux kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-787Out-of-bounds Write

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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