{"apiVersion":"1.0","identifier":"CVE-2026-74395","description":"In the Linux kernel, the following vulnerability has been resolved: RDMA/mlx5: Fix devx subscribe-event unwind NULL dereference MLX5_IB_METHOD_DEVX_SUBSCRIBE_EVENT() links event_sub into sub_list before initializing the fields used by the shared error path. If eventfd_ctx_fdget() then fails, the unwind path dereferences event_sub->ev_file in uverbs_uobject_put() and calls subscribe_event_xa_dealloc() with an unset xa_key_level1. subscribe_event_xa_alloc() creates the XA entry exactly once for a given key_level1, on the first occurrence of that key. The unwind path must therefore call subscribe_event_xa_dealloc() exactly once for it as well. Enforce that by adding devx_key_in_sub_list() and calling subscribe_event_xa_dealloc() only when the last matching pending entry is being cleaned up.","publishedAt":"2026-08-15T06:22:41","lastModifiedAt":"2026-08-17T06:19:34","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-74395","cvssScore":null,"cvssVector":"Pending","epssProbability":0.00177,"riskScore":0,"affectedProduct":"Linux kernel","affectedVersions":"unknown","vulnerabilityType":"Kernel","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-74395","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-74395","en":"https://www.redsauce.net/en/cves/CVE-2026-74395","fr":"https://www.redsauce.net/fr/cves/CVE-2026-74395","pt":"https://www.redsauce.net/pt/cves/CVE-2026-74395","de":"https://www.redsauce.net/de/cves/CVE-2026-74395","sk":"https://www.redsauce.net/sk/cves/CVE-2026-74395","el":"https://www.redsauce.net/el/cves/CVE-2026-74395"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-74395"}}