{"cve":"CVE-2026-64136","nvd":{"published":"2026-07-19T16:17:55.463","modified":"2026-10-19T21:17:25.580","status":"Modified","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: protect tc_count increment in smb2_find_smb_sess_tcon_unlocked()\n\nCommit 96c4af418586 (\"cifs: Fix locking usage for tcon fields\")\nrefactored cifs code to change cifs_tcp_ses_lock for tc_lock around\ntc_count changes.\n\nThere was missing lock around tc_count increment inside\nsmb2_find_smb_sess_tcon_unlocked().","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8},"cwes":["CWE-362"],"references":["https://git.kernel.org/stable/c/13fb413ae22a37c69341918a6d651d19a9b0b9b7","https://git.kernel.org/stable/c/4d8690dace005a38e6dbde9ecce2da3ad85c7c41","https://git.kernel.org/stable/c/7df1df6f40c0720d30206aa35c0343b962350e0d","https://git.kernel.org/stable/c/bf4ebdb19ff9b3cdf992b50715fe61633327416a","https://git.kernel.org/stable/c/e374f4e496fef8168784f93a4477d67be34485fd"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-21T03:43:09.190223697+00:00"},"epss":{"cve":"CVE-2026-64136","score":0.00379,"percentile":0.31592,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}