CVE-2026-89639 cifs: use cifs_invalidate_cache() in cifs_do_truncate() for O_TRUNC

In the Linux kernel, the following vulnerability has been resolved: cifs: use cifsinvalidatecache in cifsdotruncate for OTRUNC cifsdotruncate is invoked from cifsopen without irwsem, so it cannot use cifsresizefilelocked to perform a proper fscache cookie resize. Instead, add cifsinvalidatecache...

CVE-2026-89639 cifs: use cifs_invalidate_cache() in cifs_do_truncate() for O_TRUNC

In the Linux kernel, the following vulnerability has been resolved: cifs: use cifsinvalidatecache in cifsdotruncate for OTRUNC cifsdotruncate is invoked from cifsopen without irwsem, so it cannot use cifsresizefilelocked to perform a proper fscache cookie resize. Instead, add cifsinvalidatecache...

CVE-2026-89639

In the Linux kernel, the following vulnerability has been resolved: cifs: use cifsinvalidatecache in cifsdotruncate for OTRUNC cifsdotruncate is invoked from cifsopen without irwsem, so it cannot use cifsresizefilelocked to perform a proper fscache cookie resize. Instead, add cifsinvalidatecache...

EUVD-2026-76551

In the Linux kernel, the following vulnerability has been resolved: cifs: use cifsinvalidatecache in cifsdotruncate for OTRUNC cifsdotruncate is invoked from cifsopen without irwsem, so it cannot use cifsresizefilelocked to perform a proper fscache cookie resize. Instead, add cifsinvalidatecache...

CVE-2026-89638

CVE-2026-89638 is a Linux kernel SMB client (cifs.ko) flaw rated CVSS 7.8 (HIGH) , exploitable locally with low privileges. When a file with the setuid or setgid bit is written to on CIFS mounts using the cifsacl , modefromsid , or SMB3.1.1 POSIX extensions, the kernel's cifs_setattr_unix() and c...

CVE-2026-89637

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix UAF and buffer leak in cifschecktrans2 for malformed secondary T2 When a valid primary TRANSACT2 response has been received mid-respbuf set, mid-multiRsp true and a subsequent secondary response causes...

CVE-2026-89637

CVE-2026-89637 is a use-after-free (UAF) and buffer leak in the Linux kernel SMB client , specifically in the cifs_check_trans2() function. When a valid primary TRANSACT2 response is followed by a malformed secondary response, handle_mid() overwrites mid->resp_buf without releasing the primary...

CVE-2026-89637 smb: client: fix UAF and buffer leak in cifs_check_trans2() for malformed secondary T2

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix UAF and buffer leak in cifschecktrans2 for malformed secondary T2 When a valid primary TRANSACT2 response has been received mid-respbuf set, mid-multiRsp true and a subsequent secondary response causes...

EUVD-2026-76550

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-2026-89638 smb: client: clear setuid/setgid bit on write with cifsacl/modefromsid/posix extensions

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...

EUVD-2026-76549

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix UAF and buffer leak in cifschecktrans2 for malformed secondary T2 When a valid primary TRANSACT2 response has been received mid-respbuf set, mid-multiRsp true and a subsequent secondary response causes...

CVE-2026-89637 smb: client: fix UAF and buffer leak in cifs_check_trans2() for malformed secondary T2

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix UAF and buffer leak in cifschecktrans2 for malformed secondary T2 When a valid primary TRANSACT2 response has been received mid-respbuf set, mid-multiRsp true and a subsequent secondary response causes...

CVE-2026-89636

A use-after-free vulnerability exists in the Linux kernel's SMB client . When free_tgts() releases all structures in ce->tlist, the ce->tgthint pointer is left referencing a freed cache_dfs_tgt object. If reused before reset, the stale pointer triggers the bug. The fix sets ce->tgthint t...

EUVD-2026-76548

In the Linux kernel, the following vulnerability has been resolved: smb: client: clear ce-tgthint in freetgts When freetgts frees all structures in ce-tlist, ce-tgthint is left pointing to one of the freed cachedfstgt structures. If ce-tgthint is not reset before it is used later, it results in a...

CVE-2026-89636 smb: client: clear ce->tgthint in free_tgts()

In the Linux kernel, the following vulnerability has been resolved: smb: client: clear ce-tgthint in freetgts When freetgts frees all structures in ce-tlist, ce-tgthint is left pointing to one of the freed cachedfstgt structures. If ce-tgthint is not reset before it is used later, it results in a...

CVE-2026-89636

In the Linux kernel, the following vulnerability has been resolved: smb: client: clear ce-tgthint in freetgts When freetgts frees all structures in ce-tlist, ce-tgthint is left pointing to one of the freed cachedfstgt structures. If ce-tgthint is not reset before it is used later, it results in a...

CVE-2026-89636 smb: client: clear ce->tgthint in free_tgts()

In the Linux kernel, the following vulnerability has been resolved: smb: client: clear ce-tgthint in freetgts When freetgts frees all structures in ce-tlist, ce-tgthint is left pointing to one of the freed cachedfstgt structures. If ce-tgthint is not reset before it is used later, it results in a...

CVE-2026-89635 ksmbd: only rebind the reopened file's own oplock on durable reconnect

In the Linux kernel, the following vulnerability has been resolved: ksmbd: only rebind the reopened file's own oplock on durable reconnect ksmbdreopendurablefd walks the inode's moplist and rebinds every detached oplock to the reconnecting session: listforeachentryrcuop, &ci-moplist, opentry,...

EUVD-2026-76547

In the Linux kernel, the following vulnerability has been resolved: ksmbd: only rebind the reopened file's own oplock on durable reconnect ksmbdreopendurablefd walks the inode's moplist and rebinds every detached oplock to the reconnecting session: listforeachentryrcuop, &ci-moplist, opentry,...

CVE-2026-89635 ksmbd: only rebind the reopened file's own oplock on durable reconnect

In the Linux kernel, the following vulnerability has been resolved: ksmbd: only rebind the reopened file's own oplock on durable reconnect ksmbdreopendurablefd walks the inode's moplist and rebinds every detached oplock to the reconnecting session: listforeachentryrcuop, &ci-moplist, opentry,...