CVE-2026-89691 nfsd: clear opcnt on compound arg release to prevent OOB read

In the Linux kernel, the following vulnerability has been resolved: nfsd: clear opcnt on compound arg release to prevent OOB read nfsd4releasecompoundargs resets args-ops to the inline iops8 array when the dynamically-allocated ops buffer is freed, but leaves args-opcnt at its original value whic...

EUVD-2026-76603

In the Linux kernel, the following vulnerability has been resolved: nfsd: clear opcnt on compound arg release to prevent OOB read nfsd4releasecompoundargs resets args-ops to the inline iops8 array when the dynamically-allocated ops buffer is freed, but leaves args-opcnt at its original value whic...

CVE-2026-89691

In the Linux kernel, the following vulnerability has been resolved: nfsd: clear opcnt on compound arg release to prevent OOB read nfsd4releasecompoundargs resets args-ops to the inline iops8 array when the dynamically-allocated ops buffer is freed, but leaves args-opcnt at its original value whic...

CVE-2026-89690

CVE-2026-89690 is a use-after-free in the nfsd (NFS server daemon) component of the Linux kernel. The rpc_status netlink dumpit reads operation numbers from args->ops[] under rcu_read_lock, but that vmalloc buffer is freed synchronously via vfree() in nfsd4_release_compoundargs() without being...

EUVD-2026-76602

In the Linux kernel, the following vulnerability has been resolved: nfsd: defer vfree of compound ops to fix rpcstatus UAF The rpcstatus netlink dumpit walks every in-flight svcrqst under rcureadlock and, for NFSv4 requests, reads opnums out of args-ops. But args-ops is a separate vmalloc buffer...

CVE-2026-89690 nfsd: defer vfree of compound ops to fix rpc_status UAF

In the Linux kernel, the following vulnerability has been resolved: nfsd: defer vfree of compound ops to fix rpcstatus UAF The rpcstatus netlink dumpit walks every in-flight svcrqst under rcureadlock and, for NFSv4 requests, reads opnums out of args-ops. But args-ops is a separate vmalloc buffer...

CVE-2026-89690

In the Linux kernel, the following vulnerability has been resolved: nfsd: defer vfree of compound ops to fix rpcstatus UAF The rpcstatus netlink dumpit walks every in-flight svcrqst under rcureadlock and, for NFSv4 requests, reads opnums out of args-ops. But args-ops is a separate vmalloc buffer...

CVE-2026-89688 nfsd: drop the stateid, not the stateowner, on seqid_op replay retry

In the Linux kernel, the following vulnerability has been resolved: nfsd: drop the stateid, not the stateowner, on seqidop replay retry In nfs4preprocessseqidop the stateid is obtained from nfsd4lookupstateid, which holds a reference on the nfs4stid sccount but takes no reference on the stateowne...

CVE-2026-89688 nfsd: drop the stateid, not the stateowner, on seqid_op replay retry

In the Linux kernel, the following vulnerability has been resolved: nfsd: drop the stateid, not the stateowner, on seqidop replay retry In nfs4preprocessseqidop the stateid is obtained from nfsd4lookupstateid, which holds a reference on the nfs4stid sccount but takes no reference on the stateowne...

CVE-2026-89688

CVE-2026-89688 affects the Linux kernel's nfsd (NFS server) component. In nfs4_preprocess_seqid_op(), when nfsd4_cstate_assign_replay() returns -EAGAIN (replay owner being torn down), the error path incorrectly drops a stateowner reference it never acquired while leaking the stid reference it did...

CVE-2026-89689 nfsd: don't free session slots that are still in use

In the Linux kernel, the following vulnerability has been resolved: nfsd: don't free session slots that are still in use nfsd4sequence can free the very slot it is currently processing. When the session shrinker has reduced setargetmaxslots below sefchannel.maxreqs, the shrink path checks three...

EUVD-2026-76601

In the Linux kernel, the following vulnerability has been resolved: nfsd: don't free session slots that are still in use nfsd4sequence can free the very slot it is currently processing. When the session shrinker has reduced setargetmaxslots below sefchannel.maxreqs, the shrink path checks three...

CVE-2026-89689

In the Linux kernel, the following vulnerability has been resolved: nfsd: don't free session slots that are still in use nfsd4sequence can free the very slot it is currently processing. When the session shrinker has reduced setargetmaxslots below sefchannel.maxreqs, the shrink path checks three...

CVE-2026-89688

In the Linux kernel, the following vulnerability has been resolved: nfsd: drop the stateid, not the stateowner, on seqidop replay retry In nfs4preprocessseqidop the stateid is obtained from nfsd4lookupstateid, which holds a reference on the nfs4stid sccount but takes no reference on the stateowne...

CVE-2026-89687 nfsd: ensure nfsd_file_do_acquire() does not use a non-opened file

In the Linux kernel, the following vulnerability has been resolved: nfsd: ensure nfsdfiledoacquire does not use a non-opened file -atomicopen is permitted to return success without actually opening the file. It indicates this by calling finishnoopen. This means dentrycreate can return a file whic...

CVE-2026-89687 nfsd: ensure nfsd_file_do_acquire() does not use a non-opened file

In the Linux kernel, the following vulnerability has been resolved: nfsd: ensure nfsdfiledoacquire does not use a non-opened file -atomicopen is permitted to return success without actually opening the file. It indicates this by calling finishnoopen. This means dentrycreate can return a file whic...

EUVD-2026-76599

In the Linux kernel, the following vulnerability has been resolved: nfsd: ensure nfsdfiledoacquire does not use a non-opened file -atomicopen is permitted to return success without actually opening the file. It indicates this by calling finishnoopen. This means dentrycreate can return a file whic...

CVE-2026-89687

In the Linux kernel, the following vulnerability has been resolved: nfsd: ensure nfsdfiledoacquire does not use a non-opened file -atomicopen is permitted to return success without actually opening the file. It indicates this by calling finishnoopen. This means dentrycreate can return a file whic...

CVE-2026-89687

CVE-2026-89687 affects the nfsd (Network File System Daemon) subsystem of the Linux kernel . The root cause is that the ->atomic_open operation is permitted to return success without actually opening the file (via finish_no_open()), which means dentry_create() can return a file that has not be...

CVE-2026-89686 nfsd: fix BUG_ON in nfsd4_alloc_layout_stateid on racing delegation revoke

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix BUGON in nfsd4alloclayoutstateid on racing delegation revoke nfsd4alloclayoutstateid reads fp-fidelegfile without holding filock when the parent stateid is a delegation. A concurrent delegation revoke via the laundromat...