CVE-2026-89683High· 7.0▾ TwilightA flaw was found in the Linux kernel's nfsd (NFS daemon). A remote attacker could exploit this vulnerability by sending a specially crafted NFSv3 filehandle targeting a V4ROOT export's file system identifier (fsid). This action triggers a …
▾ 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%
— → 5.9
none → medium
— → 5.9
none → medium
— → 5.9
none → medium
Last analysed / modified upstream
5.9 → 7
medium → high
A flaw was found in the Linux kernel's nfsd (NFS daemon). A remote attacker could exploit this vulnerability by sending a specially crafted NFSv3 filehandle targeting a V4ROOT export's file system identifier (fsid). This action triggers a dentry reference leak, which can lead to resource exhaustion and ultimately result in a Denial of Service (DoS) on the affected system.
kernel: nfsd: fix dentry ref leak on V4ROOT export filehandle lookup — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-16.
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.
CVE-2026-89646Medium· 5.5kernel: ceph: fix leaked inode reference on writeback abort at umount (CVE-2026-89646)
CVE-2026-89664High· 7.0kernel: nfsd: release OPEN-decoded posix ACLs via op_release (CVE-2026-89664)
CVE-2026-89692Medium· 5.5kernel: nfsd: clear CALLBACK_RUNNING on failed delegation recall queue (CVE-2026-89692)
CVE-2026-89645Medium· 5.5kernel: btrfs: drop recovered reloc root refs on recovery failure (CVE-2026-89645)
CVE-2026-80997Medium· 5.5kernel: net: ipa: fix stalled modem TX queue after runtime resume (CVE-2026-80997)
CVE-2026-89500High· 7.0kernel: ring-buffer: Make cpu_buffer::free_page a buffer_data_read_page (CVE-2026-89500)