CVE-2026-89702High· 7.0▾ TwilightA flaw was found in the Linux kernel's Network File System Daemon (nfsd). When processing NFSv2/v3-over-UDP requests, the `nfsd_fh_verify` and `nfsd_fh_verify_err` tracepoints incorrectly size a memory buffer. This can lead to an out-of-bo…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 38.5 · 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%
— → 7
none → high
0.2% → 0.5%
— → 7
none → high
— → 9.8
none → critical
9.8 → 7
critical → high
7 → 9.8
high → critical
9.8 → 7
critical → high
Last analysed / modified upstream
A flaw was found in the Linux kernel's Network File System Daemon (nfsd). When processing NFSv2/v3-over-UDP requests, the nfsd_fh_verify and nfsd_fh_verify_err tracepoints incorrectly size a memory buffer. This can lead to an out-of-bounds write, potentially allowing a remote attacker to cause a denial of service or disclose sensitive information from the kernel's ring buffer.
kernel: nfsd: size fh_verify server sockaddr slot by xpt_locallen — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-15.
Affected:
No fix planned:
Not affected:
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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