- 9.8CriticalCVSS base score
- 0.41%Exploitation in 30 daysEPSS · top 65% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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().
Timeline
ID reserved
By Linux
Published
- 3 months later
· 3 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.41% · top 65% of all CVEs (11 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
- affected 92d197ef7e9bb4994dae2bb17c2f19fa09d219a2 – < 7585d4242f59185b084957fa077396e53dbf7c24
- affected 953953abb66e52c224057ab91e404284fefeab62 – < 7df1df6f40c0720d30206aa35c0343b962350e0d
- affected 601dd3b79769b38d30b693c40afdb2a4b7edf9d0 – < 13fb413ae22a37c69341918a6d651d19a9b0b9b7
- affected 3969db6b22e3d90d8c5f22ac1a7fe0350a94c136 – < bf4ebdb19ff9b3cdf992b50715fe61633327416a
- affected 96c4af418586ee9a6aab61738644366426e05316 – < e374f4e496fef8168784f93a4477d67be34485fd
- affected 96c4af418586ee9a6aab61738644366426e05316 – < 4d8690dace005a38e6dbde9ecce2da3ad85c7c41
- affected 8c59eeeeffa1524ef57e173a89a1a3ff539888d5
- affected 6.6.128 – < 6.6.142
- affected 6.12.75 – < 6.12.92
- affected 6.18.16 – < 6.18.34
- affected 6.19.6 – < 6.20
- affected 7.0
- unaffected < 7.0
- unaffected 6.6.142 – ≤ 6.6.*
- unaffected 6.12.92 – ≤ 6.12.*
- unaffected 6.18.34 – ≤ 6.18.*
- unaffected 7.0.11 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References6
- https://git.kernel.org/stable/c/7585d4242f59185b084957fa077396e53dbf7c24 (opens in a new tab)
- https://git.kernel.org/stable/c/7df1df6f40c0720d30206aa35c0343b962350e0d (opens in a new tab)
- https://git.kernel.org/stable/c/13fb413ae22a37c69341918a6d651d19a9b0b9b7 (opens in a new tab)
- https://git.kernel.org/stable/c/bf4ebdb19ff9b3cdf992b50715fe61633327416a (opens in a new tab)
- https://git.kernel.org/stable/c/e374f4e496fef8168784f93a4477d67be34485fd (opens in a new tab)
- https://git.kernel.org/stable/c/4d8690dace005a38e6dbde9ecce2da3ad85c7c41 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-45821 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-64136)Record last updated .