{"id":"CVE-2026-56934","kind":"vulnerability","aliases":["CVE-2026-56934"],"related":[],"title":"Linux kernel ARM IOMMU page table flaw allows local privilege escalation","description":"In arm_lpae_split_blk_unmap of drivers/iommu/io-pgtable-arm-common.c, there is a possible Logic error due to a logic error in the code. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation.","summary":"A logic error in the Arm LPAE IOMMU page table code (arm_lpae_split_blk_unmap) lets a local user with ordinary access escalate privileges. No user interaction is needed to exploit it.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["arm","infrastructure","kernel","linux"],"not_affected_if":[],"how_to_check":null,"fix":null,"status":"open","published_at":"2026-11-10T20:19:15+00:00","first_seen_at":"2026-11-10T20:46:07+00:00","triaged_at":"2026-11-10T20:53:43+00:00","updated_at":"2026-11-10T20:53:43+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-11-10T20:53:43Z","model":"claude-haiku-5-5","output":{"fix":"unknown","reach":"local","title":"Linux kernel ARM IOMMU page table flaw allows local privilege escalation","impact":"high","summary":"A logic error in the Arm LPAE IOMMU page table code (arm_lpae_split_blk_unmap) lets a local user with ordinary access escalate privileges. No user interaction is needed to exploit it.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["linux","kernel","arm"],"confidence":0.5,"fix_status":"unknown","needs_auth":"yes","worst_case":"local user gains elevated privileges on the machine","analyst_note":"Find the affected kernel version ranges and fixed commit for CVE-2026-56934 in the NVD entry or kernel.org stable advisories, and confirm whether the ARM SMMU LPAE driver path is reachable on common systems.","how_to_check":"- unknown","plain_action":"","product_name":"","needs_analyst":true,"not_affected_if":[],"who_is_affected":"unknown","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"high"},"cost_usd":0.000661,"input_tokens":4557,"output_tokens":411,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-2026':13A,16A '-56934':14A,17A 'access':44B 'allow':8A 'arm':3A,18B,27B,33B,55C 'blk':36B,58C 'code':32B,75C 'could':77C 'cve':12A,15A 'drivers/iommu/io-pgtable-arm-common.c':61C 'due':68C 'error':24B,67C,72C 'escal':11A,45B,81C 'execut':86C 'exploit':53B,95C 'flaw':7A 'infrastructur':19B 'interact':49B,90C 'iommu':4A,29B 'kernel':2A,20B 'lead':78C 'let':38B 'linux':1A,21B 'local':9A,40B,80C 'logic':23B,66C,71C 'lpae':28B,34B,56C 'need':51B,88C,93C 'ordinari':43B 'page':5A,30B 'possibl':65C 'privileg':10A,46B,83C,87C 'split':35B,57C 'tabl':6A,31B 'unmap':37B,59C 'user':41B,48B,85C,89C","nicknames":[],"mitigations":[],"who_affected":null,"tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"none","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["arm","infrastructure","kernel","linux","unknown"],"campaign_type":null,"search_a":"'-2026':13A,16A '-56934':14A,17A 'allow':8A 'arm':3A 'cve':12A,15A 'escal':11A 'flaw':7A 'iommu':4A 'kernel':2A 'linux':1A 'local':9A 'page':5A 'privileg':10A 'tabl':6A","search_b":"'access':44B 'arm':18B,27B,33B 'blk':36B 'code':32B 'error':24B 'escal':45B 'exploit':53B 'infrastructur':19B 'interact':49B 'iommu':29B 'kernel':20B 'let':38B 'linux':21B 'local':40B 'logic':23B 'lpae':28B,34B 'need':51B 'ordinari':43B 'page':30B 'privileg':46B 'split':35B 'tabl':31B 'unmap':37B 'user':41B,48B","search_c":"'arm':55C 'blk':58C 'code':75C 'could':77C 'drivers/iommu/io-pgtable-arm-common.c':61C 'due':68C 'error':67C,72C 'escal':81C 'execut':86C 'exploit':95C 'interact':90C 'lead':78C 'local':80C 'logic':66C,71C 'lpae':56C 'need':88C,93C 'possibl':65C 'privileg':83C,87C 'split':57C 'unmap':59C 'user':85C,89C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-10T20:19:15+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-56934","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56934","severity":null,"published_at":"2026-11-10T20:19:15+00:00","modified_at":"2026-11-10T20:19:15+00:00","first_seen_at":"2026-11-10T20:46:07+00:00","fetched_at":"2026-11-10T20:46:07+00:00","note":null}],"documents":[],"disclosures":[],"exploit_sources":[],"notice":"Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai"}