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NVD / CVE Program· CNA Linux

CVE-2026-90056: net: fec: only stop PTP if it was initialized

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 0602a4c238d2b6ed6e2bf5fa8ef7fa0203883dac, 0dc8b3a395c3a749ab62c078f2fd54a402ae7e2b, 1973f108c481fab9bdc7daa6c77442af4a7388ab; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1.

Low priority for now. Upgrade to Linux Linux 0602a4c238d2b6ed6e2bf5fa8ef7fa0203883dac, 0dc8b3a395c3a749ab62c078f2fd54a402ae7e2b, 1973f108c481fab9bdc7daa6c77442af4a7388ab; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: net: fec: only stop PTP if it was initialized fec_ptp_init() is only called when fep->bufdesc_ex is available. However, fec_probe() unconditionally calls fec_ptp_stop() on the failed_init path, and fec_drv_remove() unconditionally calls fec_ptp_stop() during device removal. Check fep->bufdesc_ex before calling fec_ptp_stop() in both paths to avoid stopping PTP when it was not initialized.

—No exploit Fix available
Published
Sep 17, 2026
Updated
Oct 19, 2026
EPSS
0.2% · 12th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 9561b28349a22c808c3ce25eaed4d132104bafb7, 4.2affected
    • 32cba57ba74be58589aeb4cb6496183e46a5e3e5 and later · before 0dc8b3a395c3a749ab62c078f2fd54a402ae7e2baffected · git
    • 32cba57ba74be58589aeb4cb6496183e46a5e3e5 and later · before 1973f108c481fab9bdc7daa6c77442af4a7388abaffected · git
    • 32cba57ba74be58589aeb4cb6496183e46a5e3e5 and later · before 0602a4c238d2b6ed6e2bf5fa8ef7fa0203883dacaffected · git
    • 32cba57ba74be58589aeb4cb6496183e46a5e3e5 and later · before 7566789664813c1778f0d4b7e0539fd863ea450caffected · git
    • 32cba57ba74be58589aeb4cb6496183e46a5e3e5 and later · before 383f699a86fd04458dc47d10578c17e94f63d92faffected · git
    • 32cba57ba74be58589aeb4cb6496183e46a5e3e5 and later · before 1f9639caeece703012bdb23975ebedf70f426269affected · git
    • 32cba57ba74be58589aeb4cb6496183e46a5e3e5 and later · before 5975009651c4e5ec1492612962d0dd3dc86f6bdaaffected · git
    • 32cba57ba74be58589aeb4cb6496183e46a5e3e5 and later · before dd890ae29299636fb037276fc1b5238698d08b03affected · git
    • 3.18.99 and later · before 3.19affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.6-17.2.6-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-90054Sep 17, 2026 · tcp: fix corruption of urgent data on multi-segment retransmit
    0Monitor
  • ← EarlierCVE-2026-90055Sep 17, 2026 · usb: atm: usbatm: fix invalid ci_range initialization
    0Monitor
  • Later →CVE-2026-90057Sep 17, 2026 · slip: remove slip_hangup() to fix use-after-free in slip_receive_buf()
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux0602a4c238d2b6ed6e2bf5fa8ef7fa0203883dacVendor (CNA)
Linux Linux0dc8b3a395c3a749ab62c078f2fd54a402ae7e2bVendor (CNA)
Linux Linux1973f108c481fab9bdc7daa6c77442af4a7388abVendor (CNA)
Linux Linux1f9639caeece703012bdb23975ebedf70f426269Vendor (CNA)
Linux Linux3.19Vendor (CNA)
Linux Linux383f699a86fd04458dc47d10578c17e94f63d92fVendor (CNA)
Linux Linux5975009651c4e5ec1492612962d0dd3dc86f6bdaVendor (CNA)
Linux Linux7566789664813c1778f0d4b7e0539fd863ea450cVendor (CNA)
Linux Linuxdd890ae29299636fb037276fc1b5238698d08b03Vendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.0—Microsoft (MSRC)
azl3 kernel 6.6.152.1-1 on Azure Linux 3.06.6.157.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

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References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records