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CVE-2026-98451

smb: client: use finish_no_open() for non-regular inodes PUBLISHED

Description (CNA)

In the Linux kernel, the following vulnerability has been resolved: smb: client: use finish_no_open() for non-regular inodes An O_CREAT open can find an existing symlink or another non-regular inode. cifs_atomic_open() calls finish_open() on it and attaches a cifsFileInfo. Symlink inodes have no CIFS release operation, so the dentry reference held by cifsFileInfo is leaked. FMODE_OPENED also prevents the VFS from following the symlink. Track whether cifs_do_create() returned an open server handle. For non-regular inodes, close the handle if present, remove the pending open, and call finish_no_open() so the VFS can continue the lookup. Do not set FMODE_CREATED unless a regular file was opened. For O_NOFOLLOW with __O_REGULAR, return -ELOOP before the VFS's -EFTYPE check. Defer closing a legacy POSIX handle on a non-regular inode until after inode lookup. This avoids closing it again if lookup fails.

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected d2c127197dfc0b2bae62a52e1e0d3e3ff493919e before 045532f920d86dd76600b635f9756e5fd671ddfc; affected d2c127197dfc0b2bae62a52e1e0d3e3ff493919e before ed03d547598c92a036f20e89156540995cac889a; affected d2c127197dfc0b2bae62a52e1e0d3e3ff493919e before 70a7918fda54a06d836acc91eb9a3c7e860fe0a0; affected d2c127197dfc0b2bae62a52e1e0d3e3ff493919e before 3c07deb26273155c180aedfd9041ab58015d2521; affected d2c127197dfc0b2bae62a52e1e0d3e3ff493919e before e66cf1625ec4a3fe68346119f371def713fd0a4d
Linux / Linuxaffected 3.6; unaffected 0 before 3.6; unaffected 6.6.160 through 6.6.*; unaffected 6.12.113 through 6.12.*; unaffected 6.18.56 through 6.18.*; unaffected 7.2.9 through 7.2.*; unaffected 7.3 through *

CWE

No CWE identifiers supplied.

References