CVE-2026-98563Medium· 4.1▾ SunlitA flaw was found in the Linux kernel's phylink component. When an error occurs during Ethernet physical layer (PHY) device initialization, the kernel prematurely stores a reference to the device before setup finishes. If the bringup operat…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 22.5 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Oct 20.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
Last analysed / modified upstream
0.2%
— → 4.1
none → medium
A flaw was found in the Linux kernel's phylink component. When an error occurs during Ethernet physical layer (PHY) device initialization, the kernel prematurely stores a reference to the device before setup finishes. If the bringup operation fails, the device is detached and freed, but the kernel retains a stale pointer. A local user with administrative privileges or network hardware events triggering connection retries can cause the kernel to access this freed memory, leading to memory corruption or a Denial of Service (DoS) via a system crash.
kernel: net: phylink: record the PHY only once bringup cannot fail — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-20.
Affected:
No fix planned:
Not affected:
Fix deferred
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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