CVE-2026-64136
smb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked()
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: smb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked() Commit 96c4af418586 ("cifs: Fix locking usage for tcon fields") refactored cifs code to change cifs_tcp_ses_lock for tc_lock around tc_count changes. There was missing lock around tc_count increment inside smb2_find_smb_sess_tcon_unlocked().
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Jul 19, 2026 |
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Affected Versions
Linux / Linux
953953abb66e52c224057ab91e404284fefeab62 < 7df1df6f40c0720d30206aa35c0343b962350e0d 601dd3b79769b38d30b693c40afdb2a4b7edf9d0 < 13fb413ae22a37c69341918a6d651d19a9b0b9b7 3969db6b22e3d90d8c5f22ac1a7fe0350a94c136 < bf4ebdb19ff9b3cdf992b50715fe61633327416a 96c4af418586ee9a6aab61738644366426e05316 < e374f4e496fef8168784f93a4477d67be34485fd 96c4af418586ee9a6aab61738644366426e05316 < 4d8690dace005a38e6dbde9ecce2da3ad85c7c41 8c59eeeeffa1524ef57e173a89a1a3ff539888d5 6.6.128 < 6.6.142 6.12.75 < 6.12.92 6.18.16 < 6.18.34 6.19.6 < 6.20
Linux / Linux
7.0
References
git.kernel.org: https://git.kernel.org/stable/c/7df1df6f40c0720d30206aa35c0343b962350e0d git.kernel.org: https://git.kernel.org/stable/c/13fb413ae22a37c69341918a6d651d19a9b0b9b7 git.kernel.org: https://git.kernel.org/stable/c/bf4ebdb19ff9b3cdf992b50715fe61633327416a git.kernel.org: https://git.kernel.org/stable/c/e374f4e496fef8168784f93a4477d67be34485fd git.kernel.org: https://git.kernel.org/stable/c/4d8690dace005a38e6dbde9ecce2da3ad85c7c41