{"id":"CVE-2026-88781","kind":"vulnerability","aliases":["CVE-2026-88781"],"related":[],"title":"ASUS motherboard firmware: untrusted pointer lets kernel-level user tamper or crash","description":"Untrusted Pointer Dereference in ASUS certain motherboards firmware allows a kernel-level privileges user can supply an arbitrary memory address via an I/O command, leading to subsequent system information being tampered with or causing a system crash.\nRefer to the 'Security Update for Multiple ASUS Motherboards' section on the ASUS Security Advisory for more information.","summary":"Certain ASUS motherboard firmware dereferences an arbitrary memory address supplied through an I/O command. A user with kernel-level privileges can use this to tamper with system information or crash the system.","severity":"medium","cvss":6.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["asus","firmware","infrastructure","linux","motherboard","windows"],"not_affected_if":["unknown"],"how_to_check":"- unknown","fix":"- Check the 'Security Update for Multiple ASUS Motherboards' section of the ASUS Security Advisory for the affected models and the firmware (BIOS/UEFI) version to install.","status":"open","published_at":"2026-10-27T03:16:26+00:00","first_seen_at":"2026-10-27T03:20:26+00:00","triaged_at":"2026-10-27T03:21:56+00:00","updated_at":"2026-10-27T03:21:56+00:00","category":"infrastructure","confidence":0.5,"triage":{"at":"2026-10-27T03:21:56Z","model":"claude-haiku-5-5","output":{"fix":"- Check the 'Security Update for Multiple ASUS Motherboards' section of the ASUS Security Advisory for the affected models and the firmware (BIOS/UEFI) version to install.","reach":"local","title":"ASUS motherboard firmware: untrusted pointer lets kernel-level user tamper or crash","impact":"medium","summary":"Certain ASUS motherboard firmware dereferences an arbitrary memory address supplied through an I/O command. A user with kernel-level privileges can use this to tamper with system information or crash the system.","category":"infrastructure","nicknames":[],"who_cares":["asus","motherboard","firmware","windows","linux"],"confidence":0.5,"needs_auth":"yes","worst_case":"Kernel-level user tampers with system information or crashes the machine.","analyst_note":"Find the affected ASUS motherboard model list and firmware versions in the ASUS Security Advisory referenced by the NVD entry.","how_to_check":"- unknown","needs_analyst":true,"not_affected_if":["unknown"],"who_is_affected":"Owners of the listed ASUS motherboard models with unpatched firmware. The attacker must already have kernel-level privileges on the machine, so the issue matters mainly on multi-user or compromised systems. unknown for the exact model list, as the sources do not name it.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"medium"},"cost_usd":0.000584,"input_tokens":3347,"output_tokens":498,"severity_before":"medium"},"analyst_status":null,"analyst_note":null,"search":"'-2026':15A,18A '-88781':16A,19A 'address':34B,79C 'advisori':111C 'allow':67C 'arbitrari':32B,77C 'asus':1A,20B,27B,63C,104C,109C 'caus':93C 'certain':26B,64C 'command':39B,83C 'crash':13A,56B,96C 'cve':14A,17A 'derefer':30B,61C 'firmwar':3A,21B,29B,66C 'i/o':38B,82C 'inform':54B,88C,114C 'infrastructur':22B 'kernel':8A,44B,70C 'kernel-level':7A,43B,69C 'lead':84C 'let':6A 'level':9A,45B,71C 'linux':23B 'memori':33B,78C 'motherboard':2A,24B,28B,65C,105C 'multipl':103C 'pointer':5A,60C 'privileg':46B,72C 'refer':97C 'section':106C 'secur':100C,110C 'subsequ':86C 'suppli':35B,75C 'system':53B,58B,87C,95C 'tamper':11A,51B,90C 'untrust':4A,59C 'updat':101C 'use':48B 'user':10A,41B,73C 'via':80C 'window':25B","nicknames":[],"mitigations":[],"who_affected":"Owners of the listed ASUS motherboard models with unpatched firmware. The attacker must already have kernel-level privileges on the machine, so the issue matters mainly on multi-user or compromised systems. unknown for the exact model list, as the sources do not name it.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-27T03:16:26+00:00","kev":null,"cvss_vector":"CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/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":"54bf65a7-a193-42d2-b1ba-8e150d3c35e1","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-88781","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-88781","severity":null,"published_at":"2026-10-27T03:16:26+00:00","modified_at":"2026-10-27T03:16:26+00:00","first_seen_at":"2026-10-27T03:20:26+00:00","fetched_at":"2026-10-27T03:20:26+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}