{"cve":"CVE-2026-93267","nvd":{"published":"2026-09-24T16:17:23.570","modified":"2026-10-19T10:17:18.093","status":"Received","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/core: Fix potential use after free in uverbs_free_dmah()\n\nWhen accessing a dmah via the netlink path the only synchronization\nmechanism for the said dmah is rdma_restrack_get().\nCurrently, rdma_restrack_del() is invoked at the end of\nuverbs_free_dmah(), which is too late, since by that point\nvendor-specific resources associated with the dmah might already be\nfreed. This can leave a short window where the dmah remains accessible\nthrough restrack, leading to a potential use-after-free.\n\nFix this by moving the rdma_restrack_begin_del() call to the start of\nuverbs_free_dmah(), ensuring that the dmah is removed from restrack\nbefore its internal resources are released. This guarantees that no new\nusers hold references to a dmah that is in the process of destruction.\n\nIn addition, this change preserves the intended inverted order\nbetween create and destroy routines: resources are added to\nrestrack at the end of successful creation, and hence shall be removed\nfrom the restrack first thing during the destruction flow, which keeps\nthe lifecycle management consistent and predictable.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["https://git.kernel.org/stable/c/2696626a0be5877f445fb647c25ef43930c777e6","https://git.kernel.org/stable/c/8b22722f45a29a7c0900b1d4d0bc5da5492ece10","https://git.kernel.org/stable/c/bfc119a40c04bbe3daad826f2160ccbfae6c64ce"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:56:02.509636177+00:00"},"epss":{"cve":"CVE-2026-93267","score":0.00189,"percentile":0.08481,"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."]}