vulntracker.iovulntracker.io
© 2026 vulntracker.io

CVE-2025-40103

smb: client: Fix refcount leak for cifs_sb_tlink

N/A
Published: October 30, 2025 at 09:48 AM UTC
Updated: October 19, 2026 at 09:10 PM UTC
1 product affected across 1 vendorLinux Kernel

Using Linux by Linux?

Get instant alerts when new vulnerabilities affect Linux - before attackers find them.

Real-time alertsTrack your software stackFree plan available
Start FreeSign In
Severity
N/A
Exploit prediction
EPSS 0.2%

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
90%
3.78ceb984379462f94bdebef3288d569c6e1f912ea
Vendor states this is fixed in 790282abe9d805f08618c1c24ea2529e7259b692 (fixed)
Vendor states this is fixed in 896bb31e1416f582503db1350cf1bd10dc64e5a6 (fixed)
Vendor states this is fixed in c2b77f42205ef485a647f62082c442c1cd69d3fc (fixed)
Vendor states this is fixed in d3c8ea197055c260119a13360e8202a27e53e1e4 (fixed)
Vendor states this is fixed in d7dd034c14928306db1b46be277ae439b84dacf9 (fixed)
Vendor states this is fixed in e15605b68b490186da2ad8029c0351a9cfb0b9af (fixed)
Vendor states this is fixed in 3.7 (unaffected)
Vendor states this is fixed in 5.15.203 (unaffected)
Vendor states this is fixed in 6.1.158 (unaffected)
Vendor states this is fixed in 6.12.55 (unaffected)
Vendor states this is fixed in 6.17.5 (unaffected)
Vendor states this is fixed in 6.18 (unaffected)
Vendor states this is fixed in 6.6.114 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (6)

Source: cverecord
https://git.kernel.org/stable/c/790282abe9d805f08618c1c24ea2529e7259b692
Source: cverecord
https://git.kernel.org/stable/c/d7dd034c14928306db1b46be277ae439b84dacf9
Source: cverecord
https://git.kernel.org/stable/c/e15605b68b490186da2ad8029c0351a9cfb0b9af
Source: cverecord
https://git.kernel.org/stable/c/896bb31e1416f582503db1350cf1bd10dc64e5a6
Source: cverecord
https://git.kernel.org/stable/c/c2b77f42205ef485a647f62082c442c1cd69d3fc
Source: cverecord
https://git.kernel.org/stable/c/d3c8ea197055c260119a13360e8202a27e53e1e4

Quick Info

StatusDEFERRED

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create accountSign in
Free plan, no card