CVE-2026-89711

A vulnerability in the Linux kernel's NFSD (Network File System Daemon) arises from an invalid assumption in nfsd_mode_check(). During NFS reexport , a dentry may lack i_op->lookup, causing a subsequent lookup_one_unlocked() path to dereference a NULL method pointer . A remote unauthenticated ...

CVE-2026-89711 NFSD: remove flawed WARN_ON_ONCE from nfsd_mode_check

In the Linux kernel, the following vulnerability has been resolved: NFSD: remove flawed WARNONONCE from nfsdmodecheck The header for commit e75b23f9e323 "nfsd: check dcanlookup in fhverify of directories" details the assumption that justified adding the WARNONONCE to nfsdmodecheck, that assumptio...

CVE-2026-89711

In the Linux kernel, the following vulnerability has been resolved: NFSD: remove flawed WARNONONCE from nfsdmodecheck The header for commit e75b23f9e323 "nfsd: check dcanlookup in fhverify of directories" details the assumption that justified adding the WARNONONCE to nfsdmodecheck, that assumptio...

CVE-2026-89708 nfsd: RCU-protect cl_cb_session to fix use-after-free on session teardown

In the Linux kernel, the following vulnerability has been resolved: nfsd: RCU-protect clcbsession to fix use-after-free on session teardown After a DESTROYSESSION the per-session teardown path can free a session while rpciod still holds an inflight callback rpctask that dereferences...

CVE-2026-89707

In the Linux kernel, the following vulnerability has been resolved: nfsd: release path refs on followdown error nfsdcrossmnt initializes a local struct path with mntget and dget before calling followdown. On a negative return the error arm jumps to out without releasing those references: err =...

CVE-2026-89706

In the Linux kernel, the following vulnerability has been resolved: nfsd: Reset write verifier when async COPY writeback fails Async COPY captures nn-writeverf at request time and reports it to the client via CBOFFLOAD after the worker kthread completes. When the post-copy vfsfsyncrange or...

CVE-2026-89706

A vulnerability in the Linux kernel's nfsd (NFS server) component causes silent data loss during asynchronous COPY operations. When post-copy writeback fails (via vfs_fsync_range() or filemap_check_wb_err()), the server correctly reports NFS_UNSTABLE but fails to rotate the write verifier. The cl...

EUVD-2026-76617

In the Linux kernel, the following vulnerability has been resolved: nfsd: restore rqstatuscounter to even on all nfsddispatch exit paths nfsddispatch sets rqstatuscounter to an odd value once a request has been decoded, and back to an even value once it has been fully processed, forming a seq-loc...

CVE-2026-89704

In the Linux kernel, the following vulnerability has been resolved: nfsd: sample writeback error cursor before async COPY loop nfsdcopyfilerange samples dst-fwberr into "since" after the copy loop, then uses it to detect writeback errors via filemapcheckwberr once vfsfsyncrange returns. Because t...

CVE-2026-89704 nfsd: sample writeback error cursor before async COPY loop

In the Linux kernel, the following vulnerability has been resolved: nfsd: sample writeback error cursor before async COPY loop nfsdcopyfilerange samples dst-fwberr into "since" after the copy loop, then uses it to detect writeback errors via filemapcheckwberr once vfsfsyncrange returns. Because t...

CVE-2026-89705 nfsd: restore rq_status_counter to even on all nfsd_dispatch() exit paths

In the Linux kernel, the following vulnerability has been resolved: nfsd: restore rqstatuscounter to even on all nfsddispatch exit paths nfsddispatch sets rqstatuscounter to an odd value once a request has been decoded, and back to an even value once it has been fully processed, forming a seq-loc...

CVE-2026-89703 nfsd: set SC_STATUS_FREED in nfsd4_drop_revoked_stid for delegations

In the Linux kernel, the following vulnerability has been resolved: nfsd: set SCSTATUSFREED in nfsd4droprevokedstid for delegations nfsd4droprevokedstid handles FREESTATEID for admin-revoked delegations but does not set SCSTATUSFREED before releasing cllock. revokedelegation uses this flag to...

EUVD-2026-76614

In the Linux kernel, the following vulnerability has been resolved: nfsd: size fhverify server sockaddr slot by xptlocallen The nfsdfhverify and nfsdfhverifyerr tracepoints declare the server sockaddr slot sized by xptremotelen but fill it from xptlocal using xptlocallen: TPSTRUCTentry...

CVE-2026-89702 nfsd: size fh_verify server sockaddr slot by xpt_locallen

In the Linux kernel, the following vulnerability has been resolved: nfsd: size fhverify server sockaddr slot by xptlocallen The nfsdfhverify and nfsdfhverifyerr tracepoints declare the server sockaddr slot sized by xptremotelen but fill it from xptlocal using xptlocallen: TPSTRUCTentry...

CVE-2026-89702 nfsd: size fh_verify server sockaddr slot by xpt_locallen

In the Linux kernel, the following vulnerability has been resolved: nfsd: size fhverify server sockaddr slot by xptlocallen The nfsdfhverify and nfsdfhverifyerr tracepoints declare the server sockaddr slot sized by xptremotelen but fill it from xptlocal using xptlocallen: TPSTRUCTentry...

CVE-2026-89702

CVE-2026-89702 is a buffer overflow in the Linux kernel's NFSd (Network File System Daemon). The nfsd_fh_verify and nfsd_fh_verify_err tracepoints declare the server sockaddr ring-buffer slot using xpt_remotelen but fill it from xpt_local using xpt_locallen. For NFSv2/v3-over-UDP connections, xpt...

CVE-2026-89702

In the Linux kernel, the following vulnerability has been resolved: nfsd: size fhverify server sockaddr slot by xptlocallen The nfsdfhverify and nfsdfhverifyerr tracepoints declare the server sockaddr slot sized by xptremotelen but fill it from xptlocal using xptlocallen: TPSTRUCTentry...

CVE-2026-89701

In the Linux kernel, the following vulnerability has been resolved: nfsd: validate nseconds in TIMEDELEG decode paths The xdrgen-based TIMEDELEGACCESS and TIMEDELEGMODIFY decode arms store a raw uint32t nseconds directly into tvnsec without enforcing nseconds NSECPERSEC. The legacy...

CVE-2026-89697 nfsd: add fh_want_write() for early-verified SETATTR in nfsd_proc_setattr()

In the Linux kernel, the following vulnerability has been resolved: nfsd: add fhwantwrite for early-verified SETATTR in nfsdprocsetattr The BOTHTIMESET branch calls fhverify early so setattrprepare can inspect the dentry. This causes nfsdsetattr to skip fhwantwrite, so notifychange runs without a...

CVE-2026-89693 nfsd: check nfsd4_acl_to_attr() return value in nfsd4_create()

In the Linux kernel, the following vulnerability has been resolved: nfsd: check nfsd4acltoattr return value in nfsd4create nfsd4create stores the return value of nfsd4acltoattr in status, but the switchcreate-crtype block unconditionally overwrites it in every branch. ACL translation errors are...