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...

EUVD-2026-76604

In the Linux kernel, the following vulnerability has been resolved: nfsd: clear CALLBACKRUNNING on failed delegation recall queue nfsdbreakonedeleg sets NFSD4CALLBACKRUNNING via testandsetbit at entry to serialize recall work, then calls nfsd4runcb to queue the recall. When the queue attempt fail...

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...

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...

EUVD-2026-76600

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...

EUVD-2026-76597

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-2026-89684

CVE-2026-89684 is a race condition in the Linux kernel's nfsd component, specifically in nfs4_alloc_init_cpntf_state() during copy-state notification initialization. The cpntf entry was published into the s2s_cp_stateids IDR before its list_head was linked, creating a window where a concurrent NF...

CVE-2026-89683 nfsd: fix dentry ref leak on V4ROOT export filehandle lookup

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...

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-2026-89667 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...

EUVD-2026-76448

In the Linux kernel, the following vulnerability has been resolved: SUNRPC: Reject short RFC 4121 MIC tokens in gsskrb5verifymicv2 gsskrb5verifymicv2 reads the token ID at ptr0..1, the flags byte at ptr2, and padding at ptr3..7, then passes ptr + GSSKRB5TOKHDRLEN and cksumlen to gsskrb5micbuildsg...

CVE-2026-89537

CVE-2026-89537 affects the Linux kernel's SUNRPC subsystem, specifically the gss_krb5_verify_mic_v2() function, which reads RFC 4121 MIC token header fields without first validating the token length. A remote malicious NFS server can supply an undersized Kerberos MIC token, causing the verifier t...

CVE-2026-89537 SUNRPC: Reject short RFC 4121 MIC tokens in gss_krb5_verify_mic_v2

In the Linux kernel, the following vulnerability has been resolved: SUNRPC: Reject short RFC 4121 MIC tokens in gsskrb5verifymicv2 gsskrb5verifymicv2 reads the token ID at ptr0..1, the flags byte at ptr2, and padding at ptr3..7, then passes ptr + GSSKRB5TOKHDRLEN and cksumlen to gsskrb5micbuildsg...

CVE-2026-89537

In the Linux kernel, the following vulnerability has been resolved: SUNRPC: Reject short RFC 4121 MIC tokens in gsskrb5verifymicv2 gsskrb5verifymicv2 reads the token ID at ptr0..1, the flags byte at ptr2, and padding at ptr3..7, then passes ptr + GSSKRB5TOKHDRLEN and cksumlen to gsskrb5micbuildsg...

PT-2026-90253

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the SUNRPC component where the gss krb5 verify mic v2 function fails to verify the length of the read token-len before accessing the token ID, flags byte, and padding...

CVE-2026-89537: Undefined Security Weakness

In the Linux kernel, the following vulnerability has been resolved: SUNRPC: Reject short RFC 4121 MIC tokens in gsskrb5verifymicv2 gsskrb5verifymicv2 reads the token ID at ptr0..1, the flags byte at ptr2, and padding at ptr3..7, then passes ptr + GSSKRB5TOKHDRLEN and cksumlen to gsskrb5micbuildsg...

PT-2026-90393

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description An issue exists in the nfsd4 create file function where dentry create may provide a different dentry than the one passed in. This scenario can occur if the exported filesystem is NFS and...

PT-2026-90404

Name of the Vulnerable Software and Affected Versions Linux Kernel affected versions not specified Description A race condition exists in the NFSv4 server. In the nfs4 preprocess seqid op function, the stateid is obtained via nfsd4 lookup stateid, which increments the sc count reference on the nf...

PT-2026-90409

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description In the nfsd component, the nfsd4 create function fails to properly handle the return value of the nfsd4 acl to attr function. The return value is stored in the status variable, but a...

USN-8725-1: Linux kernel vulnerabilities

Several security issues were discovered in the Linux kernel. An attacker could possibly use these to compromise the system. This update corrects flaws in the following subsystems: - NVIDIA Tegra memory controller driver; - File systems infrastructure; - Network file system NFS server daemon; -...