{"cve":{"cve_id":"CVE-2026-53243","is_kev":false,"kev_date_added":null,"kev_vendor_project":null,"kev_product":null,"kev_vulnerability_name":null,"kev_short_description":null,"kev_required_action":null,"kev_due_date":null,"kev_known_ransomware":null,"kev_notes":null,"kev_cwes":null,"epss_score":null,"epss_percentile":null,"epss_as_of":null,"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nrseq: Fix using an uninitialized stack variable in rseq_exit_user_update()\n\nThere is an bug in which an uninitialized stack variable is used in\nrseq_exit_user_update() as reported by syzbot:\n\nBUG: KMSAN: kernel-infoleak in rseq_set_ids_get_csaddr include/linux/rseq_entry.h:502 [inline]\n\nThe local variable:\n\n\tstruct rseq_ids ids = {\n\t\t.cpu_id\t = task_cpu(t),\n\t\t.mm_cid\t = task_mm_cid(t),\n\t\t.node_id = cpu_to_node(ids.cpu_id),\n\t};\n\nAccording to the C standard, the evaluation order of expressions in an\ninitializer list is indeterminately sequenced. The compiler (Clang, in\nthis KMSAN build) evaluates `cpu_to_node(ids.cpu_id)` *before*\n`ids.cpu_id` is initialized with `task_cpu(t)`.\n\nThis is fixed by moving the assignment of ids.node_id outside the\nstructure initialization.","published_at":"2026-06-25T08:39:37.794000Z","last_modified_at":null,"cvss_v3_score":null,"cvss_v3_vector":null,"cvss_v3_severity":null,"cvss_v4_score":null,"cvss_v4_vector":null,"cvss_v4_severity":null,"ssvc_decision":null,"ssvc_exploitation":null,"ssvc_automatable":null,"ssvc_technical_impact":null,"cwes":null,"nvd_references":["https://git.kernel.org/stable/c/e12d20a63b61aaf9de4772effccf42cc9a003e58","https://git.kernel.org/stable/c/6d99479799c69c3cb588fcda19c81d8f61d64ecd"],"vuln_status":null,"trending_score":null,"is_trending":false,"has_trended":false,"trended_number_one":false,"trending_peak_score":null,"trending_peak_rank":null,"started_trending_at":null,"trended_number_one_at":null,"summary_generated":null,"summary_generated_at":null,"summary_model":null,"created_at":"2026-06-28T17:55:28.590503Z","updated_at":"2026-06-28T23:30:51.545322Z"},"effective_severity":null,"badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":null,"metrics":[]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"d242126fd21ab8f1631fdbc8589e43a9d4229f3b","version_start_inclusive":true,"version_end":"e12d20a63b61aaf9de4772effccf42cc9a003e58","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:d242126fd21ab8f1631fdbc8589e43a9d4229f3b:e12d20a63b61aaf9de4772effccf42cc9a003e58"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"82f572449cfe75f12ea985986da60e11f308f77d","version_start_inclusive":true,"version_end":"6d99479799c69c3cb588fcda19c81d8f61d64ecd","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:82f572449cfe75f12ea985986da60e11f308f77d:6d99479799c69c3cb588fcda19c81d8f61d64ecd"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.0.10","version_start_inclusive":true,"version_end":"7.0.13","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:7.0.10:7.0.13"}],"exploit_refs":[],"news":[],"references":[{"url":"https://git.kernel.org/stable/c/e12d20a63b61aaf9de4772effccf42cc9a003e58","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/6d99479799c69c3cb588fcda19c81d8f61d64ecd","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-06-25T08:39:37.794000Z","label":"CVE published","source":null}]}