CVE-2026-89706Medium· 5.5▾ SunlitA flaw was found in the Linux kernel's nfsd component. When an asynchronous (async) copy writeback operation fails, the server's write verifier is not properly reset. This can lead to a client incorrectly assuming that data has been made d…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0.1 · 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%
— → 6.8
none → medium
— → 7.5
none → high
7.5 → 6.8
high → medium
6.8 → 7.5
medium → high
7.5 → 7
0.2% → 0.5%
7 → 7.5
Last analysed / modified upstream
7.5 → 5.5
high → medium
A flaw was found in the Linux kernel's nfsd component. When an asynchronous (async) copy writeback operation fails, the server's write verifier is not properly reset. This can lead to a client incorrectly assuming that data has been made durable, resulting in the silent loss of data that was intended to be copied.
kernel: nfsd: Reset write verifier when async COPY writeback fails — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-10-21.
Affected:
No fix planned:
Not affected:
Out of support scope
Workarounds / mitigations:
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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