CVE-2026-90056

Denial of service via uninitialized PTP cleanup

Published Sep 17, 2026 · Updated Sep 17, 2026

Improper PTP cleanup in the Linux FEC driver allows local users to interrupt service through device removal or failed initialization. In fec_main.c, fec_probe() and fec_drv_remove() call fec_ptp_stop() without checking fep->bufdesc_ex, canceling work and a timer whose initialization was skipped. Exposure requires the affected FEC device and cleanup path; SUSE assesses privileged local access, while the published material does not specify a hang or crash.

CVSS severity4.4
Medium
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper PTP cleanup in the Linux FEC driver allows local users to interrupt service through device removal or failed initialization. In fec_main.c, fec_probe() and fec_drv_remove() call fec_ptp_stop() without checking fep->bufdesc_ex, canceling work and a timer whose initialization was skipped. Exposure requires the affected FEC device and cleanup path; SUSE assesses privileged local access, while the published material does not specify a hang or crash.

The record

CVE
CVE-2026-90056
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 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=3.18.99 <3.19
  2. Affected versionversion=32cba57ba74be58589aeb4cb6496183e46a5e3e5 <0602a4c238d2b6ed6e2bf5fa8ef7fa0203883dac
  3. Affected versionversion=32cba57ba74be58589aeb4cb6496183e46a5e3e5 <0dc8b3a395c3a749ab62c078f2fd54a402ae7e2b
  4. Affected versionversion=32cba57ba74be58589aeb4cb6496183e46a5e3e5 <1973f108c481fab9bdc7daa6c77442af4a7388ab
  5. Affected versionversion=32cba57ba74be58589aeb4cb6496183e46a5e3e5 <1f9639caeece703012bdb23975ebedf70f426269
  6. Affected versionversion=32cba57ba74be58589aeb4cb6496183e46a5e3e5 <383f699a86fd04458dc47d10578c17e94f63d92f
  7. Affected versionversion=32cba57ba74be58589aeb4cb6496183e46a5e3e5 <5975009651c4e5ec1492612962d0dd3dc86f6bda
  8. Affected versionversion=32cba57ba74be58589aeb4cb6496183e46a5e3e5 <7566789664813c1778f0d4b7e0539fd863ea450c
  9. Affected versionversion=32cba57ba74be58589aeb4cb6496183e46a5e3e5 <dd890ae29299636fb037276fc1b5238698d08b03
  10. Affected versionversion=4.2
  11. Affected versionversion=9561b28349a22c808c3ce25eaed4d132104bafb7

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=3.18.99 <3.19; version=32cba57ba74be58589aeb4cb6496183e46a5e3e5 <0602a4c238d2b6ed6e2bf5fa8ef7fa0203883dac; version=32cba57ba74be58589aeb4cb6496183e46a5e3e5 <0dc8b3a395c3a749ab62c078f2fd54a402ae7e2b; version=32cba57ba74be58589aeb4cb6496183e46a5e3e5 <1973f108c481fab9bdc7daa6c77442af4a7388ab; version=32cba57ba74be58589aeb4cb6496183e46a5e3e5 <1f9639caeece703012bdb23975ebedf70f426269; version=32cba57ba74be58589aeb4cb6496183e46a5e3e5 <383f699a86fd04458dc47d10578c17e94f63d92f; version=32cba57ba74be58589aeb4cb6496183e46a5e3e5 <5975009651c4e5ec1492612962d0dd3dc86f6bda; version=32cba57ba74be58589aeb4cb6496183e46a5e3e5 <7566789664813c1778f0d4b7e0539fd863ea450c; version=32cba57ba74be58589aeb4cb6496183e46a5e3e5 <dd890ae29299636fb037276fc1b5238698d08b03; version=4.2; version=9561b28349a22c808c3ce25eaed4d132104bafb7

Published CVSS scores

4.4SUSECVSS:3.1/AV:L/AC:L/PR:H/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.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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