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

  - In the Linux kernel, the following vulnerability has been resolved: nfsd: release OPEN-decoded posix ACLs     via op_release nfsd4_decode_createhow4() calls nfsd4_decode_fattr4(), which allocates refcounted struct     posix_acl objects via posix_acl_alloc() and stores them in open->op_pacl and open->op_dpacl. These     pointers must be released once the OPEN compound finishes. When nfsd4_decode_open_claim4() returns a non-     seqid-mutating error, the dispatcher short-circuits before op_func runs: nfsd4_proc_compound() if     (op->status && op->opnum == OP_OPEN) op->status = nfsd4_open_omfg(...) if     (!seqid_mutating_err(ntohl(op->status))) return op->status; /* nfsd4_open() never runs */ ...
    opdesc->op_release(&op->u) /* must still release op_pacl/op_dpacl */ Before this change OP_OPEN had no     .op_release in nfsd4_ops[], and the release pair lived inside nfsd4_open() at its out_err: label. On the     short-circuit path nfsd4_open() is never invoked, so both posix_acl refs leak on every malformed OPEN     compound that carries valid POSIX ACL createhow4 attributes. Add nfsd4_open_release() and wire it as     .op_release for OP_OPEN. posix_acl_release() is NULL-safe, so the single release site covers both the     normal path and the nfsd4_open_omfg short-circuit. Remove the matching posix_acl_release() pair from     nfsd4_open()'s out_err: label to avoid double-releasing. The compound loop has two encoding branches:
    nfsd4_encode_operation() for normal ops, and nfsd4_encode_replay() for v4.0 replayed ops. op_release was     only called from nfsd4_encode_operation(), so resources attached to op->u leak on the replay path. Move     the op_release() call out of nfsd4_encode_operation() and the replay branch, placing it after the if-else     in nfsd4_proc_compound(). This gives a single call site in a fairly obviously-correct place, covering both     the normal encoding and replay paths. (CVE-2026-89664)

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Linux Distros Unpatched Vulnerability : CVE-2026-89664

high Nessus Plugin ID 345312

Version 1.9