smb: client: use finish_no_open() for non-regular inodes
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.6.160, 6.12.113, 6.18.56, 7.2.9
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
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.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From d2c127197dfc0b2bae62a52e1e0d3e3ff493919e · fixed in 045532f920d86dd76600b635f9756e5fd671ddfc; From d2c127197dfc0b2bae62a52e1e0d3e3ff493919e · fixed in ed03d547598c92a036f20e89156540995cac889a; From d2c127197dfc0b2bae62a52e1e0d3e3ff493919e · fixed in 70a7918fda54a06d836acc91eb9a3c7e860fe0a0; From d2c127197dfc0b2bae62a52e1e0d3e3ff493919e · fixed in 3c07deb26273155c180aedfd9041ab58015d2521; From d2c127197dfc0b2bae62a52e1e0d3e3ff493919e · fixed in e66cf1625ec4a3fe68346119f371def713fd0a4d
- Linux Linux
3.6
- KernelLinux
From 3.6.0 · fixed in 6.6.160; From 6.7.0 · fixed in 6.12.113; From 6.13.0 · fixed in 6.18.56; From 6.19.0 · fixed in 7.2.9