CVE-2025-40103

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.

EPSS

0.2% chance of exploitation in the next 30 days; higher than 10% of CVEs (scores of 2026-10-25)

Published

2025-10-30

Modified

2026-10-19

Record from

the NVD, synced 2026-10-21

References

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

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