CVE-2026-68175

Denial of service via incomplete trace_pipe cleanup

Published Aug 10, 2026 · Updated Aug 10, 2026

Resource leak in the Linux kernel mmiotrace tracer allows local users to exhaust memory by repeatedly closing partial trace_pipe reads. tracing_release_pipe calls pipe_close, but mmiotrace registered mmio_close only as close, leaving header_iter memory and a pci_dev reference unreleased. The path is reachable only when mmiotrace is compiled in and active and the user can access trace_pipe; repetition can destabilize the host.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Resource leak in the Linux kernel mmiotrace tracer allows local users to exhaust memory by repeatedly closing partial trace_pipe reads. tracing_release_pipe calls pipe_close, but mmiotrace registered mmio_close only as close, leaving header_iter memory and a pci_dev reference unreleased. The path is reachable only when mmiotrace is compiled in and active and the user can access trace_pipe; repetition can destabilize the host.

The record

CVE
CVE-2026-68175
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-763, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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=2.6.33
  2. Affected versionversion=c521efd1700a8c0f7ce26f011f5eaecca17fabfa <594e1cf3f736779a535873fd5988162d827bfe4f
  3. Affected versionversion=c521efd1700a8c0f7ce26f011f5eaecca17fabfa <c1d87e724ae55e781b7cc7ccafb34d9e668582b2
  4. Affected versionversion=c521efd1700a8c0f7ce26f011f5eaecca17fabfa <cb459fec4f7b13caf646101ff076e94ef38434d8
  5. Affected versionversion=c521efd1700a8c0f7ce26f011f5eaecca17fabfa <cf5a82bef623b969a609f2b7e392d06dbae34aa6
  6. Affected versionversion=c521efd1700a8c0f7ce26f011f5eaecca17fabfa <f9e6dfe341fb31c95b9655eb6b1db8b3ae090817

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.33; version=c521efd1700a8c0f7ce26f011f5eaecca17fabfa <594e1cf3f736779a535873fd5988162d827bfe4f; version=c521efd1700a8c0f7ce26f011f5eaecca17fabfa <c1d87e724ae55e781b7cc7ccafb34d9e668582b2; version=c521efd1700a8c0f7ce26f011f5eaecca17fabfa <cb459fec4f7b13caf646101ff076e94ef38434d8; version=c521efd1700a8c0f7ce26f011f5eaecca17fabfa <cf5a82bef623b969a609f2b7e392d06dbae34aa6; version=c521efd1700a8c0f7ce26f011f5eaecca17fabfa <f9e6dfe341fb31c95b9655eb6b1db8b3ae090817

Published CVSS scores

5.5Red HatCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-763Release of Invalid Pointer or Reference
T1499.004Application or System Exploitation

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

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo