The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - nfsd: block non-SAVEFH ops after FOREIGN PUTFH to prevent NULL deref When CONFIG_NFSD_V4_2_INTER_SSC is     enabled, nfsd4_putfh() can return success with fh_dentry and fh_export both NULL if fh_verify() returns     nfserr_stale and putfh->no_verify is true. The NFSD4_FH_FOREIGN flag is set, but the compound dispatch     loop only uses this flag to bypass the nfserr_nofilehandle check -- it does not prevent subsequent ops     from running with a NULL fh_dentry. A remote client can exploit this by crafting a COMPOUND that includes     an inter-SSC COPY (which causes check_if_stalefh_allowed() to set no_verify=true on the saved PUTFH) with     an additional op inserted between the source PUTFH and SAVEFH. For example, SETATTR calls fh_want_write()     which dereferences fh_export->ex_path.mnt without calling fh_verify() first, causing a NULL pointer     dereference in the nfsd kthread. Fix this by gating the dispatch loop: when NFSD4_FH_FOREIGN is set and     fh_dentry is NULL, only OP_SAVEFH (needed for the inter-SSC flow) and ops with ALLOWED_WITHOUT_FH (which     don't need a resolved filehandle) may proceed. All other ops receive nfserr_stale, per RFC 7862 Section     15.2.3 which specifies that foreign filehandle validation is deferred to the consuming operation and     NFS4ERR_STALE returned at that point. (CVE-2026-89696)

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Linux Distros Unpatched Vulnerability : CVE-2026-89696

high Nessus Plugin ID 345430

Version 1.12