CVE-2026-90056
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.
Affected versions
Linux kernel versions
3.18.99,
4.2
and later are affected. Fixed in
5.10.270,
5.15.221,
6.1.188,
6.6.157,
6.12.110,
6.18.52,
7.2.6,
7.3-rc1
and their respective stable series.
References
8 totalFrequently asked questions
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What is CVE-2026-90056?
CVE-2026-90056 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 3.18.99 onward and has been patched in 5.10.270, 5.15.221, 6.1.188 and others. CVE-2026-90056 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-90056?
Yes. CVE-2026-90056 has been patched. Fixed versions include 5.10.270, 5.15.221, 6.1.188 and others. If you are running Linux kernel 3.18.99 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-90056 actively exploited?
No. CVE-2026-90056 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.