CVE-2026-89695

A flaw was found in the Linux kernel's Network File System Daemon nfsd. The nfsd4decodeposixacl function, responsible for decoding POSIX Access Control Lists ACLs, does not properly cap the entry count received from a client. A remote attacker can exploit this by sending a specially crafted ACL...

DEBIAN-CVE-2026-89695

In the Linux kernel, the following vulnerability has been resolved: nfsd: cap decoded POSIX ACL count to bound sort cost nfsd4decodeposixacl reads a u32 entry count off the wire and passes it straight to posixaclalloc and sortpaclrange. The latter is an On^2 bubble sort, so a client-chosen count...

CVE-2026-89695

In the Linux kernel, the following vulnerability has been resolved: nfsd: cap decoded POSIX ACL count to bound sort cost nfsd4decodeposixacl reads a u32 entry count off the wire and passes it straight to posixaclalloc and sortpaclrange. The latter is an On^2 bubble sort, so a client-chosen count...

AZL-100368 CVE-2026-89672 affecting package kernel 6.6.150.1-1

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-2026-89672

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

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...

DEBIAN-CVE-2026-89664

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...

AZL-100353 CVE-2026-89638 affecting package kernel 6.6.157.1-1

In the Linux kernel, the following vulnerability has been resolved: smb: client: clear setuid/setgid bit on write with cifsacl/modefromsid/posix extensions When a file has the setuid or setgid bit set and is written to, the VFS strips those bits and issues a setattr with ATTRKILLSUID/ATTRKILLSGID...

CVE-2026-89695

In the Linux kernel, the following vulnerability has been resolved: nfsd: cap decoded POSIX ACL count to bound sort cost nfsd4decodeposixacl reads a u32 entry count off the wire and passes it straight to posixaclalloc and sortpaclrange. The latter is an On^2 bubble sort, so a client-chosen count...

CVE-2026-89664

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...

UBUNTU-CVE-2026-89695

In the Linux kernel, the following vulnerability has been resolved: nfsd: cap decoded POSIX ACL count to bound sort cost nfsd4decodeposixacl reads a u32 entry count off the wire and passes it straight to posixaclalloc and sortpaclrange. The latter is an On^2 bubble sort, so a client-chosen count...

EUVD-2026-76607

In the Linux kernel, the following vulnerability has been resolved: nfsd: cap decoded POSIX ACL count to bound sort cost nfsd4decodeposixacl reads a u32 entry count off the wire and passes it straight to posixaclalloc and sortpaclrange. The latter is an On^2 bubble sort, so a client-chosen count...

CVE-2026-89695

A Denial of Service vulnerability in the Linux kernel's NFSD (Network File System Daemon) component. The nfsd4_decode_posixacl() function reads a client-supplied u32 entry count without capping it, passing it directly to an O(n²) bubble sort (sort_pacl_range()). A remote attacker can send a craft...

CVE-2026-89695

In the Linux kernel, the following vulnerability has been resolved: nfsd: cap decoded POSIX ACL count to bound sort cost nfsd4decodeposixacl reads a u32 entry count off the wire and passes it straight to posixaclalloc and sortpaclrange. The latter is an On^2 bubble sort, so a client-chosen count...

CVE-2026-89695 nfsd: cap decoded POSIX ACL count to bound sort cost

In the Linux kernel, the following vulnerability has been resolved: nfsd: cap decoded POSIX ACL count to bound sort cost nfsd4decodeposixacl reads a u32 entry count off the wire and passes it straight to posixaclalloc and sortpaclrange. The latter is an On^2 bubble sort, so a client-chosen count...

CVE-2026-89695 nfsd: cap decoded POSIX ACL count to bound sort cost

In the Linux kernel, the following vulnerability has been resolved: nfsd: cap decoded POSIX ACL count to bound sort cost nfsd4decodeposixacl reads a u32 entry count off the wire and passes it straight to posixaclalloc and sortpaclrange. The latter is an On^2 bubble sort, so a client-chosen count...

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...

EUVD-2026-76583

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-2026-89664

CVE-2026-89664 affects the Linux kernel NFS daemon (nfsd) and causes a memory leak of refcounted POSIX ACL objects. The leak occurs when malformed NFSv4 OPEN compound operations carrying valid POSIX ACL attributes trigger a short-circuit path in nfsd4_open_omfg() where nfsd4_open() is never invok...

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...