CVE-2026-89709High· 7.0▾ TwilightA flaw was found in the Linux kernel's lockd and nfsd components. An unguarded dereference of nlmsvc_ops after the nfsd module is removed can lead to a NULL pointer dereference or a use-after-free condition. This vulnerability could allow …
▾ 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%
0.2% → 0.3%
— → 4.4
none → medium
— → 8.1
none → high
8.1 → 4.4
high → medium
4.4 → 8.1
medium → high
8.1 → 4.4
high → medium
Last analysed / modified upstream
4.4 → 7
medium → high
A flaw was found in the Linux kernel's lockd and nfsd components. An unguarded dereference of nlmsvc_ops after the nfsd module is removed can lead to a NULL pointer dereference or a use-after-free condition. This vulnerability could allow a local attacker to cause a denial of service.
kernel: lockd, nfsd: RCU-protect nlmsvc_ops dispatch — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-21.
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.
CVE-2026-89686High· 7.0kernel: nfsd: fix BUG_ON in nfsd4_alloc_layout_stateid on racing delegation revoke (CVE-2026-89686)
CVE-2026-89442Medium· 5.5kernel: platform/x86: ISST: Validate socket ID in clos_assoc ioctl (CVE-2026-89442)
CVE-2026-89696Medium· 5.5kernel: nfsd: block non-SAVEFH ops after FOREIGN PUTFH to prevent NULL deref (CVE-2026-89696)
CVE-2026-80963Medium· 5.5kernel: dm-stats: fix a crash if allocation of per-cpu data fails (CVE-2026-80963)
CVE-2026-80984Medium· 5.5kernel: net/smc: do not dereference an unset send buffer on the SMC-D teardown path (CVE-2026-80984)
CVE-2026-89457Medium· 5.5kernel: s390/dasd: Guard sysfs discipline callbacks against unallocated private data (CVE-2026-89457)