CVE-2026-80977High· 7.0▾ TwilightA flaw was found in the Linux kernel's networking subsystem. The `skb_tx_error()` function improperly handles shared zerocopy state in socket buffers (skbs). When a cloned skb is processed, it can prematurely signal that its pages are free…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 38.5 · 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%
— → 7.4
none → high
— → 7.4
none → high
— → 7.8
none → high
Last analysed / modified upstream
7.8 → 7.4
7.8 → 7
A flaw was found in the Linux kernel's networking subsystem. The skb_tx_error() function improperly handles shared zerocopy state in socket buffers (skbs). When a cloned skb is processed, it can prematurely signal that its pages are free and drop shared fragment flags while the original skb is still in use. This can lead to a scenario where a local ESP (Encapsulating Security Payload) delivery decrypts data into memory fragments that it does not privately own, potentially resulting in information disclosure.
kernel: net: skbuff: don't touch shared zerocopy state in skb_tx_error() — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-14.
Affected:
No fix planned:
Out of support scope
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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