{"id":"CVE-2026-98578","title":"kernel: nfc: st21nfca: validate ISO15693 inventory length (CVE-2026-98578)","summary":"A flaw was found in the Linux kernel's ST21NFCA Near Field Communication (NFC) driver. This vulnerability allows a Denial of Service (DoS) when the system encounters malformed wireless NFC responses. A nearby attacker with a crafted NFC de…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-125","vendor":"Red Hat","product":"Linux","affected":["Linux >= 7974728094d35f38775417a26d8f30ea3602496a < e47b2a350bb0ff123434ec5484c6dc3333b0727c","Linux >= 7974728094d35f38775417a26d8f30ea3602496a < 57d183764f3002f9625ee4deeeb20716c519534e","Linux >= 7974728094d35f38775417a26d8f30ea3602496a < 3af2ea4035581a1607d9830779c187a0c7e225aa","Linux >= 7974728094d35f38775417a26d8f30ea3602496a < 9fa21b0f78adb514e3bd96a505ddb752e9727ff3","Linux >= 7974728094d35f38775417a26d8f30ea3602496a < 6353dae51bc9b3cad13c9d890b53311a46c96b4e","Linux >= 7974728094d35f38775417a26d8f30ea3602496a < fdd95e819d828c975aaeb258a3fed5dd7fd136d0","Linux >= 7974728094d35f38775417a26d8f30ea3602496a < a86987d03a4d39acdbe4533d83db4d656ea36c59","Linux >= 7974728094d35f38775417a26d8f30ea3602496a < 7f2ea5ed588c03d481f0301e6c3d4240132383fb","Linux 3.16"],"published":"2026-10-18","updated":"2026-10-20","sourceUpdated":"2026-10-20T03:44:56+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98578.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98578.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-98578"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2554912"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-98578"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-98578"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98578.mbox"},{"url":"https://git.kernel.org/stable/c/e47b2a350bb0ff123434ec5484c6dc3333b0727c"},{"url":"https://git.kernel.org/stable/c/57d183764f3002f9625ee4deeeb20716c519534e"},{"url":"https://git.kernel.org/stable/c/3af2ea4035581a1607d9830779c187a0c7e225aa"},{"url":"https://git.kernel.org/stable/c/9fa21b0f78adb514e3bd96a505ddb752e9727ff3"},{"url":"https://git.kernel.org/stable/c/6353dae51bc9b3cad13c9d890b53311a46c96b4e"},{"url":"https://git.kernel.org/stable/c/fdd95e819d828c975aaeb258a3fed5dd7fd136d0"},{"url":"https://git.kernel.org/stable/c/a86987d03a4d39acdbe4533d83db4d656ea36c59"},{"url":"https://git.kernel.org/stable/c/7f2ea5ed588c03d481f0301e6c3d4240132383fb"}],"tags":["csaf","vex","red-hat","cve.org"],"epss":0.00216,"epssPercentile":0.11998,"ingestedAt":"2026-10-18T15:45:12.254Z","slug":"CVE-2026-98578","body":"## Overview\n\nA flaw was found in the Linux kernel's ST21NFCA Near Field Communication (NFC) driver. This vulnerability allows a Denial of Service (DoS) when the system encounters malformed wireless NFC responses. A nearby attacker with a crafted NFC device can transmit a truncated ISO 15693 inventory response, which the driver processes without verifying minimum length requirements. This causes an out-of-bounds memory read, leading to a kernel crash.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-10-20 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-98578.json)\n\n**kernel: nfc: st21nfca: validate ISO15693 inventory length** — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-20.\n\nNot affected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nRefer to the advisory for fix availability.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":225773,"id":"CVE-2026-98578","ts":1792498449490,"field":"cvss","old":null,"new":"6.5"},{"seq":225772,"id":"CVE-2026-98578","ts":1792498449490,"field":"severity","old":"none","new":"medium"}]}