CVE-2025-40103
smb: client: Fix refcount leak for cifs_sb_tlink
Vexday Risk Score
3Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS —EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
30 Oct 2025Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
In the Linux kernel, the following vulnerability has been resolved:
smb: client: Fix refcount leak for cifs_sb_tlink
Fix three refcount inconsistency issues related to `cifs_sb_tlink`.
Comments for `cifs_sb_tlink` state that `cifs_put_tlink()` needs to be
called after successful calls to `cifs_sb_tlink()`. Three calls fail to
update refcount accordingly, leading to possible resource leaks.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/790282abe9d805f08618c1c24ea2529e7259b692https://git.kernel.org/stable/c/896bb31e1416f582503db1350cf1bd10dc64e5a6https://git.kernel.org/stable/c/c2b77f42205ef485a647f62082c442c1cd69d3fchttps://git.kernel.org/stable/c/d3c8ea197055c260119a13360e8202a27e53e1e4https://git.kernel.org/stable/c/d7dd034c14928306db1b46be277ae439b84dacf9https://git.kernel.org/stable/c/e15605b68b490186da2ad8029c0351a9cfb0b9af