CVE-2026-89679 nfsd: fix null dereference in nfsd4_setattr for deleg timestamp attrs

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix null dereference in nfsd4setattr for deleg timestamp attrs When a SETATTR request includes FATTR4WORD2TIMEDELEGACCESS or FATTR4WORD2TIMEDELEGMODIFY in the attribute bitmap, nfsd4setattr sets delegattrs=true and calls...

CVE-2026-89678 nfsd: fix partial-write detection in nfsd_direct_write

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix partial-write detection in nfsddirectwrite nfsddirectwrite walks a list of write segments and, after each vfsiocbiterwrite, tries to detect a short write so the loop can stop before placing the next segment at a wrong...

CVE-2026-89677 nfsd: fix possible fh_compose of wrong dentry in nfsd4_create_file()

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix possible fhcompose of wrong dentry in nfsd4createfile dentrycreate can hypothetically provide a different dentry than the one passed in. This could happen, for example, if the exported filesystem is NFS, and the server...

CVE-2026-89676 nfsd: fix stale s2s_cp_stateids IDR entry for async COPY

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix stale s2scpstateids IDR entry for async COPY For an async COPY, nfsd4copy called nfs4initcopystate before dupcopyfields, so the s2scpstateids IDR was pointed at &u-copy-cpstateid -- memory in the per-rqstp COMPOUND buff...

CVE-2026-89675 nfsd: fix UAF in async copy cancel and shutdown

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix UAF in async copy cancel and shutdown An async copy could be freed or used after free while a teardown caller OFFLOADCANCEL, nfsd4shutdowncopy, nfsd4cancelcopybysb raced the copy kthread: - findasynccopy bumped...

CVE-2026-89673 nfsd: fix XDR padding calculation in ff_encode_getdeviceinfo

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix XDR padding calculation in ffencodegetdeviceinfo nfsd4ffencodegetdeviceinfo computes the daaddrbody reservation as 16 + netidlen + addrlen, but the subsequent xdrencodeopaque calls emit 8 + roundupnetidlen, 4 +...

CVE-2026-89674 nfsd: fix XDR length calculation in nfsd4_ff_encode_layoutget

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix XDR length calculation in nfsd4ffencodelayoutget The XDR buffer size calculation in nfsd4ffencodelayoutget has multiple errors that can result in either an out-of-bounds write or leaking uninitialized kernel memory to t...

CVE-2026-89672 nfsd: gate nfs2 setacl by argp->mask

In the Linux kernel, the following vulnerability has been resolved: nfsd: gate nfs2 setacl by argp-mask The NFSACL v2 SETACL path shares the decoder convention used by its v3 sibling: nfsaclsvcdecodesetaclargs fills in argp-aclaccess only when NFSACL is set in the request mask and argp-acldefault...

CVE-2026-89671 nfsd: gate nfs3 setacl by argp->mask

In the Linux kernel, the following vulnerability has been resolved: nfsd: gate nfs3 setacl by argp-mask nfsd3procsetacl calls setposixacl unconditionally for both ACLTYPEACCESS and ACLTYPEDEFAULT, passing argp-aclaccess and argp-acldefault verbatim. The NFSv3 ACL decoder only populates those...

CVE-2026-89669 nfsd: initialize copy-notify stateid before publishing it

In the Linux kernel, the following vulnerability has been resolved: nfsd: initialize copy-notify stateid before publishing it nfsd4copynotify finished initializing the cpntf state after nfs4allocinitcpntfstate had already linked it into the s2scpstateids IDR and the parent's sccplist, with cscoun...

CVE-2026-89670 nfsd: hold rcu across localio cmpxchg retry

In the Linux kernel, the following vulnerability has been resolved: nfsd: hold rcu across localio cmpxchg retry nfsdfile objects are freed via callrcu filecache.c:296, and nfsdfileslab is created without SLABTYPESAFEBYRCU KMEMCACHEnfsdfile, 0 at filecache.c:789, so the slab page backing a freed...

CVE-2026-89668 nfsd: move nfsd_debugfs_init() after nfsd4_init_slabs() in init_nfsd()

In the Linux kernel, the following vulnerability has been resolved: nfsd: move nfsddebugfsinit after nfsd4initslabs in initnfsd nfsddebugfsinit runs before nfsd4initslabs in initnfsd. If the slab allocation fails, the bare "return retval" bypasses nfsddebugfsexit, leaving orphan debugfs files wit...

CVE-2026-89667 nfsd: close shrinker/GC/fsnotify vs per-net shutdown race in filecache

In the Linux kernel, the following vulnerability has been resolved: nfsd: close shrinker/GC/fsnotify vs per-net shutdown race in filecache The shrinker, GC worker, and fsnotify/lease callbacks can unhash an nfsdfile from the rhashtable and then call nfsdfiledisposelistdelayed to move it to the...

CVE-2026-89665 nfsd: reject out-of-range useconds in NFSv2 SETATTR/CREATE

In the Linux kernel, the following vulnerability has been resolved: nfsd: reject out-of-range useconds in NFSv2 SETATTR/CREATE The NFSv2 sattr decoder converts the wire useconds to nanoseconds in svcxdrdecodesattr: iap-iaatime.tvnsec = tmp2 NSECPERUSEC; tmp2 is a u32 and NSECPERUSEC is 1000, so t...

CVE-2026-89666 nfsd: reject out-of-range nseconds in NFSv3 SETATTR and create ops

In the Linux kernel, the following vulnerability has been resolved: nfsd: reject out-of-range nseconds in NFSv3 SETATTR and create ops A client can send an NFSv3 SETATTR, CREATE, MKDIR, SYMLINK or MKNOD carrying an atime or mtime whose nseconds field is out of range. The value is well-formed on t...

CVE-2026-89664 nfsd: release OPEN-decoded posix ACLs via op_release

In the Linux kernel, the following vulnerability has been resolved: nfsd: release OPEN-decoded posix ACLs via oprelease nfsd4decodecreatehow4 calls nfsd4decodefattr4, which allocates refcounted struct posixacl objects via posixaclalloc and stores them in open-oppacl and open-opdpacl. These pointe...

CVE-2026-89663 nfsd: revoke copy-notify stateids before dropping their reference

In the Linux kernel, the following vulnerability has been resolved: nfsd: revoke copy-notify stateids before dropping their reference Copy-notify stateids live in the s2scpstateids IDR and on their parent stid's sccplist, pinned by a single membership reference. freecpntfstatelocked only unlinks ...

CVE-2026-89661 NFSD: Prevent post-shutdown use-after-free in unlock_filesystem

In the Linux kernel, the following vulnerability has been resolved: NFSD: Prevent post-shutdown use-after-free in unlockfilesystem Writing a filesystem path to /proc/fs/nfsd/unlockfilesystem runs nfsd4cancelcopybysb before nfsdmutex is held and before the handler confirms that nn-nfsdserv is set...

CVE-2026-89662 NFSD: Prevent lock owner use-after-free during client teardown

In the Linux kernel, the following vulnerability has been resolved: NFSD: Prevent lock owner use-after-free during client teardown destroyclient releases a client's open owners, but a lock owner whose only reference is a blocked lock nbl stays on clownerstrhashtbl. clienthasstate does not count a...

CVE-2026-89660 NFSD: Prevent client use-after-free during admin state revocation

In the Linux kernel, the following vulnerability has been resolved: NFSD: Prevent client use-after-free during admin state revocation A stateid holds only a bare pointer to its nfs4client; a stateid reference does not pin it. The client survives only because destroyclient drains its stateids befo...