CVE-2026-80993Medium· 5.5▾ SunlitA flaw was found in the Linux kernel's `net: phylink` component. The `phylink_inband_caps()` function does not correctly validate the return value from `mac_select_pcs`, which can return an error pointer instead of a valid Physical Coding …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.2%
— → 4.1
none → medium
— → 4.1
none → medium
Last analysed / modified upstream
— → 5.5
none → medium
A flaw was found in the Linux kernel's net: phylink component. The phylink_inband_caps() function does not correctly validate the return value from mac_select_pcs, which can return an error pointer instead of a valid Physical Coding Sublayer (PCS) object. This oversight can lead to dereferencing an invalid pointer, causing a kernel panic. A kernel panic results in a system crash, leading to a Denial of Service (DoS).
kernel: net: phylink: correctly validate returned PCS in phylink_inband_caps — rated Low by Red Hat. Released 2026-09-11, updated 2026-09-14.
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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