{"cve":{"cve_id":"CVE-2026-52973","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\nfutex: Drop CLONE_THREAD requirement for private default hash alloc\n\nCurrently need_futex_hash_allocate_default() depends on strict pthread\nsemantics, abusing CLONE_THREAD.  This breaks the non-concurrency\nassumptions when doing the mm->futex_ref pcpu allocations, leading to\nbugs[0] when sharing the mm in other ways; ie:\n\n    BUG: KASAN: slab-use-after-free in futex_hash_put\n\n... where the +1 bias can end up on a percpu counter that mm->futex_ref\nno longer points at.\n\nLoosen the check to cover any CLONE_VM clone, except vfork().  Excluding\nvfork keeps the existing paths untouched (no overhead), and we can't\nrace in the first place: either the parent is suspended and the child\nruns alone, or mm->futex_ref is already allocated from an earlier\nCLONE_VM.","published_at":"2026-06-24T16:28:51.171000Z","last_modified_at":null,"cvss_v3_score":7.8,"cvss_v3_vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvss_v3_severity":"HIGH","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/1dcd36420af2da5bd59306dba9caf78e3d248b1d","https://git.kernel.org/stable/c/974ac49a9a068b0591a59f65c63eb06579a13091","https://git.kernel.org/stable/c/ee9dce44362b2d8132c32964656ab6dff7dfbc6a"],"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":"2026-06-28T17:55:22.518073Z","updated_at":"2026-06-28T23:30:49.890169Z"},"effective_severity":"HIGH","badges":[],"impact_analysis":[],"cvss_v3_decoded":{"version":"3.1","metrics":[{"metric":"AV","name":"Attack Vector","value":"L","value_label":"Local"},{"metric":"AC","name":"Attack Complexity","value":"L","value_label":"Low"},{"metric":"PR","name":"Privileges Required","value":"L","value_label":"Low"},{"metric":"UI","name":"User Interaction","value":"N","value_label":"None"},{"metric":"S","name":"Scope","value":"U","value_label":"Unchanged"},{"metric":"C","name":"Confidentiality","value":"H","value_label":"High"},{"metric":"I","name":"Integrity","value":"H","value_label":"High"},{"metric":"A","name":"Availability","value":"H","value_label":"High"}]},"cvss_v4_decoded":{"version":null,"metrics":[]},"affected":[{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"d9b05321e21e4b218de4ce8a590bf375f58b6346","version_start_inclusive":true,"version_end":"1dcd36420af2da5bd59306dba9caf78e3d248b1d","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:d9b05321e21e4b218de4ce8a590bf375f58b6346:1dcd36420af2da5bd59306dba9caf78e3d248b1d"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"d9b05321e21e4b218de4ce8a590bf375f58b6346","version_start_inclusive":true,"version_end":"974ac49a9a068b0591a59f65c63eb06579a13091","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:d9b05321e21e4b218de4ce8a590bf375f58b6346:974ac49a9a068b0591a59f65c63eb06579a13091"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"d9b05321e21e4b218de4ce8a590bf375f58b6346","version_start_inclusive":true,"version_end":"ee9dce44362b2d8132c32964656ab6dff7dfbc6a","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:d9b05321e21e4b218de4ce8a590bf375f58b6346:ee9dce44362b2d8132c32964656ab6dff7dfbc6a"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.17","version_start_inclusive":true,"version_end":"6.17","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.17:6.17"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"0","version_start_inclusive":true,"version_end":"6.17","version_end_inclusive":false,"cpe23_uri":"cve5:linux:linux:0:6.17"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"6.18.33","version_start_inclusive":true,"version_end":"6.18.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:6.18.33:6.18.*"},{"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.*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.0.10:7.0.*"},{"vendor_slug":"linux","vendor_name":"Linux","product_slug":"linux","product_name":"Linux","version_start":"7.1","version_start_inclusive":true,"version_end":"*","version_end_inclusive":true,"cpe23_uri":"cve5:linux:linux:7.1:*"}],"exploit_refs":[],"news":[],"references":[{"url":"https://git.kernel.org/stable/c/1dcd36420af2da5bd59306dba9caf78e3d248b1d","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/974ac49a9a068b0591a59f65c63eb06579a13091","source_type":"MISC","tags":[]},{"url":"https://git.kernel.org/stable/c/ee9dce44362b2d8132c32964656ab6dff7dfbc6a","source_type":"MISC","tags":[]}],"timeline":[{"type":"published","at":"2026-06-24T16:28:51.171000Z","label":"CVE published","source":null}]}