CVE-2026-89696: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: nfsd: block non-SAVEFH ops after FOREIGN PUTFH to prevent NULL deref When CONFIGNFSDV42INTERSSC is enabled, nfsd4putfh can return success with fhdentry and fhexport both NULL if fhverify returns nfserrstale and putfh-noverify is...

PT-2026-96604

In the Linux kernel, the following vulnerability has been resolved: NFSD: remove flawed WARN ON ONCE from nfsd mode check The header for commit e75b23f9e323 "nfsd: check d can lookup in fh verify of directories" details the assumption that justified adding the WARN ON ONCE to nfsd mode check, tha...

PT-2026-96581

In the Linux kernel, the following vulnerability has been resolved: nfsd: sample writeback error cursor before async COPY loop nfsd copy file range samples dst-f wb err into "since" after the copy loop, then uses it to detect writeback errors via filemap check wb err once vfs fsync range returns...

CVE-2026-89713: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: NFSD: check truncate permission under inode lock nfsdsetattr checks whether a size update needs NFSDMAYTRUNC before it takes inodelock. The comparison uses the file size sampled by that unlocked read, but the actual ATTRSIZE upda...

PT-2026-90375

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A use-after-free issue exists in the NFSD Network File System Daemon delegation handling. The problem occurs because nfs4 laundromat unhashes an expired delegation from cl delegations an...

PT-2026-96347

In the Linux kernel, the following vulnerability has been resolved: nfsd: RCU-protect cl cb session to fix use-after-free on session teardown After a DESTROY SESSION the per-session teardown path can free a session while rpciod still holds an inflight callback rpc task that dereferences clp-cl cb...

PT-2026-96457

In the Linux kernel, the following vulnerability has been resolved: nfsd: size fh verify server sockaddr slot by xpt locallen The nfsd fh verify and nfsd fh verify err tracepoints declare the server sockaddr slot sized by xpt remotelen but fill it from xpt local using xpt locallen: TP STRUCT entr...

PT-2026-96469

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...

PT-2026-90428

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A race condition exists in the nfsd4 ssc expire umount function when iterating through the nn-nfsd ssc mount list. The function drops the nfsd ssc lock to execute mntput on the source...

PT-2026-90414

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the Linux kernel where struct nfsd genl rqstp declares rq daddr and rq saddr as 16-byte struct sockaddr fields. When an IPv6 NFS client connects, the nfsd genl rpc...

PT-2026-96489

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix clock domain mismatch in clients still reclaiming clients still reclaiming computes a deadline from nn-boot time CLOCK REALTIME, 1.7 billion but compares it against ktime get boottime seconds CLOCK BOOTTIME, seconds sin...

CVE-2026-89700: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: nfsd: validate sockaddr length per family in listenerset nfsdsocknlpolicy declares NFSDASOCKADDR as a bare NLABINARY attribute with no minimum length. A CAPNETADMIN caller can send a 16-byte NFSDASOCKADDR with safamily=AFINET6,...

PT-2026-96546

In the Linux kernel, the following vulnerability has been resolved: NFSD: restart ssc expire umount walk after dropping nfsd ssc lock nfsd4 ssc expire umount walks nn-nfsd ssc mount list with list for each entry safeni, tmp, .... For each expired entry it sets nsui busy = true, drops nfsd ssc loc...

CVE-2026-89683: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix dentry ref leak on V4ROOT export filehandle lookup nfsdsetfhdentry leaks the dentry reference from exportfsdecodefhraw when the NFS3FHSIZE or NFSFHSIZE switch cases detect NFSEXPV4ROOT and goto out. The out: label calls...

PT-2026-90427

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the Network File System Daemon NFSD where the nfsd mode check function contains a flawed WARN ON ONCE macro. In scenarios involving NFS reexport, the function may...

CVE-2026-89685: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix clock domain mismatch in clientsstillreclaiming clientsstillreclaiming computes a deadline from nn-boottime CLOCKREALTIME, 1.7 billion but compares it against ktimegetboottimeseconds CLOCKBOOTTIME, seconds since boot. T...

CVE-2026-89712: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: NFSD: restart sscexpireumount walk after dropping nfsdssclock nfsd4sscexpireumount walks nn-nfsdsscmountlist with listforeachentrysafeni, tmp, .... For each expired entry it sets nsuibusy = true, drops nfsdssclock to run mntput o...

PT-2026-90382

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the nfsd component where the kernel fails to properly validate the nseconds field in NFSv3 SETATTR and create operations CREATE, MKDIR, SYMLINK, or MKNOD. A client can...

PT-2026-96484

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

PT-2026-90376

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A use-after-free issue exists in the Network File System server NFSD during admin state revocation. The problem occurs because a stateid contains a pointer to the nfs4 client without...