{"id":"CVE-2026-109095","kind":"vulnerability","aliases":["CVE-2026-109095"],"related":[],"title":"X.Org Xwayland and X server: integer overflow lets clients crash or leak data","description":"A integer overflow in glamor Xv Image Size handling in X.Org xwayland before 24.1.15 and X server before 21.1.26 could be used by authenticated clients to crash the X server or leak out data.","summary":"An integer overflow in the glamor Xv image size handling of X.Org Xwayland and the X server can be triggered by an authenticated client. The result is a crash of the X server or leaked memory contents.","severity":"medium","cvss":6.9,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["desktop","infrastructure","linux","xorg","xwayland"],"not_affected_if":["default-config","headless-server","no-x-clients"],"how_to_check":"- `Xwayland -version` or `Xorg -version` to read the installed version\n- Compare against the fixed versions: Xwayland before `24.1.15` and X server before `21.1.26` are affected","fix":"- Xwayland: move to `24.1.15` or later\n- X server: move to `21.1.26` or later","status":"open","published_at":"2026-11-13T14:17:47+00:00","first_seen_at":"2026-11-13T15:19:48+00:00","triaged_at":"2026-11-13T15:21:23+00:00","updated_at":"2026-11-13T15:21:23+00:00","category":"infrastructure","confidence":0.6,"triage":{"at":"2026-11-13T15:21:23Z","model":"claude-haiku-5-5","output":{"fix":"- Xwayland: move to `24.1.15` or later\n- X server: move to `21.1.26` or later","reach":"local","title":"X.Org Xwayland and X server: integer overflow lets clients crash or leak data","impact":"medium","summary":"An integer overflow in the glamor Xv image size handling of X.Org Xwayland and the X server can be triggered by an authenticated client. The result is a crash of the X server or leaked memory contents.","audience":"businesses","category":"infrastructure","nicknames":[],"who_cares":["linux","xorg","xwayland","desktop"],"confidence":0.6,"fix_status":"available","needs_auth":"yes","worst_case":"X server crashes or memory contents leak to the authenticated client","analyst_note":"","how_to_check":"- `Xwayland -version` or `Xorg -version` to read the installed version\n- Compare against the fixed versions: Xwayland before `24.1.15` and X server before `21.1.26` are affected","plain_action":"","product_name":"","needs_analyst":false,"not_affected_if":["headless-server","no-x-clients","default-config"],"who_is_affected":"Systems running X.Org Xwayland or the X server with the glamor acceleration path in use, typically Linux desktops and workstations. Exposure needs a client that can already connect to the X display, so systems with no local X clients or with headless configurations can likely skip it.","user_interaction":"no","product_ecosystem":"","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000718,"input_tokens":4532,"output_tokens":530,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-109095':16A,19A '-2026':15A,18A '21.1.26':80C '24.1.15':75C 'authent':47B,85C 'client':9A,48B,86C 'content':61B 'could':81C 'crash':10A,53B,88C 'cve':14A,17A 'data':13A,95C 'desktop':20B 'glamor':30B,66C 'handl':34B,70C 'imag':32B,68C 'infrastructur':21B 'integ':6A,26B,63C 'leak':12A,59B,93C 'let':8A 'linux':22B 'memori':60B 'overflow':7A,27B,64C 'result':50B 'server':5A,41B,57B,78C,91C 'size':33B,69C 'trigger':44B 'use':83C 'x':4A,40B,56B,77C,90C 'x.org':1A,36B,72C 'xorg':23B 'xv':31B,67C 'xwayland':2A,24B,37B,73C","nicknames":[],"mitigations":[],"who_affected":"Systems running X.Org Xwayland or the X server with the glamor acceleration path in use, typically Linux desktops and workstations. Exposure needs a client that can already connect to the X display, so systems with no local X clients or with headless configurations can likely skip it.","tier":"C","verified":{},"analyst_revisit_at":null,"fix_status":"available","audience":"businesses","plain_action":null,"pkeys":[],"ptokens":[],"labels":["desktop","infrastructure","linux","medium","xorg","xwayland"],"campaign_type":null,"search_a":"'-109095':16A,19A '-2026':15A,18A 'client':9A 'crash':10A 'cve':14A,17A 'data':13A 'integ':6A 'leak':12A 'let':8A 'overflow':7A 'server':5A 'x':4A 'x.org':1A 'xwayland':2A","search_b":"'authent':47B 'client':48B 'content':61B 'crash':53B 'desktop':20B 'glamor':30B 'handl':34B 'imag':32B 'infrastructur':21B 'integ':26B 'leak':59B 'linux':22B 'memori':60B 'overflow':27B 'result':50B 'server':41B,57B 'size':33B 'trigger':44B 'x':40B,56B 'x.org':36B 'xorg':23B 'xv':31B 'xwayland':24B,37B","search_c":"'21.1.26':80C '24.1.15':75C 'authent':85C 'client':86C 'could':81C 'crash':88C 'data':95C 'glamor':66C 'handl':70C 'imag':68C 'integ':63C 'leak':93C 'overflow':64C 'server':78C,91C 'size':69C 'use':83C 'x':77C,90C 'x.org':72C 'xv':67C 'xwayland':73C","cause_entry":null,"cause_path":null,"disclosures_checked_at":null,"first_public_at":"2026-11-13T14:17:47+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","cvss_by":"meissner@suse.de","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-109095","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-109095","severity":null,"published_at":"2026-11-13T14:17:47+00:00","modified_at":"2026-11-13T14:17:47+00:00","first_seen_at":"2026-11-13T15:19:48+00:00","fetched_at":"2026-11-13T15:19:48+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"}