What’s Vulnerable › Vulnerabilities

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

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-10-19

Description

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 products

• Linux kernel: from 3.18.99 before 3.19; 4.2 — fixed in 3.19, 7.3

How to fix

Upgrade to a fixed version: Linux kernel 3.19, 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0602a4c238d2b6ed6e2bf5fa8ef7fa0203883dac
• https://git.kernel.org/stable/c/0dc8b3a395c3a749ab62c078f2fd54a402ae7e2b
• https://git.kernel.org/stable/c/1973f108c481fab9bdc7daa6c77442af4a7388ab
• https://git.kernel.org/stable/c/1f9639caeece703012bdb23975ebedf70f426269
• https://git.kernel.org/stable/c/383f699a86fd04458dc47d10578c17e94f63d92f
• https://git.kernel.org/stable/c/5975009651c4e5ec1492612962d0dd3dc86f6bda
• https://git.kernel.org/stable/c/7566789664813c1778f0d4b7e0539fd863ea450c
• https://git.kernel.org/stable/c/dd890ae29299636fb037276fc1b5238698d08b03

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