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CVE-2026-64136

smb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked() PUBLISHED

Description (CNA)

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().

Affected (CNA)

Vendor / productVersions
Linux / Linuxaffected 953953abb66e52c224057ab91e404284fefeab62 before 7df1df6f40c0720d30206aa35c0343b962350e0d; affected 601dd3b79769b38d30b693c40afdb2a4b7edf9d0 before 13fb413ae22a37c69341918a6d651d19a9b0b9b7; affected 3969db6b22e3d90d8c5f22ac1a7fe0350a94c136 before bf4ebdb19ff9b3cdf992b50715fe61633327416a; affected 96c4af418586ee9a6aab61738644366426e05316 before e374f4e496fef8168784f93a4477d67be34485fd; affected 96c4af418586ee9a6aab61738644366426e05316 before 4d8690dace005a38e6dbde9ecce2da3ad85c7c41; affected 8c59eeeeffa1524ef57e173a89a1a3ff539888d5; affected 6.6.128 before 6.6.142; affected 6.12.75 before 6.12.92; affected 6.18.16 before 6.18.34; affected 6.19.6 before 6.20
Linux / Linuxaffected 7.0; unaffected 0 before 7.0; unaffected 6.6.142 through 6.6.*; unaffected 6.12.92 through 6.12.*; unaffected 6.18.34 through 6.18.*; unaffected 7.0.11 through 7.0.*; unaffected 7.1 through *

CWE

No CWE identifiers supplied.

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.