{"cve":"CVE-2026-90167","nvd":{"published":"2026-09-17T17:17:10.097","modified":"2026-10-21T13:20:41.793","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nksmbd: serialize oplock close with pending break ownership\n\nclose may abort an in-flight oplock break while another breaker already\nholds an opinfo reference. Releasing pending_break wakes that waiter, but\nwithout serializing the close transition with bit acquisition it can become\na new break owner through the test_and_set_bit() fast path. It can then\noverwrite OPLOCK_CLOSING with OPLOCK_ACK_WAIT and continue a break for\na dying opinfo.\n\nMake OPLOCK_CLOSING terminal once the opinfo is removed from the inode\nlist. Serialize that transition, pending_break acquisition, and\nOPLOCK_ACK_WAIT setup with an opinfo state lock. A breaker which loses\nthe race releases its ownership and returns -ENOENT. Explicitly wake\npending_break waiters during close so they can observe the terminal state.\n\nAlso prevent ACK and timeout paths from replacing OPLOCK_CLOSING with\nOPLOCK_STATE_NONE.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/5f97bac88bfb333f426f01c118b8235e75af8d96","https://git.kernel.org/stable/c/7148a6c06ddf1c263a1cf422bee541f24d3d3926","https://git.kernel.org/stable/c/7d6e682b7633120c2f93400b8c6f335d9d8e5318","https://git.kernel.org/stable/c/b0148dc5625dbfd50596ac63c7487c12e8a8ab03","https://git.kernel.org/stable/c/dc1e34f78dfab755fab9ad820ac5f82348fe1792"],"products":[],"source":"nvd","synced_at":"2026-10-22T16:41:11.231219466+00:00"},"epss":{"cve":"CVE-2026-90167","score":0.00209,"percentile":0.10947,"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."]}