{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2026-80799", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-80799", "idYear": 2026, "status": "PUBLISHED", "publishedAt": "2026-09-04T15:13:13.311Z", "updatedAt": "2026-10-19T08:43:52.451Z", "importedAt": "2026-10-24T01:58:30.346Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "nfc: llcp: fix OOB read and u8 offset wrap in TLV parsers", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: llcp: fix OOB read and u8 offset wrap in TLV parsers\n\nnfc_llcp_parse_gb_tlv() and nfc_llcp_parse_connection_tlv() contain\nthree related bugs in their TLV parsing loops:\n\n1. 'offset' is declared u8 but tlv_array_len is u16. When TLV data\n advances offset past 255 it silently wraps to zero, causing\n infinite loops or double-processing of buffer data.\n\n2. Before reading tlv[0] (type) and tlv[1] (length) there is no\n check that offset+2 <= tlv_array_len. A truncated TLV causes\n an OOB read of one byte past the buffer end.\n\n3. After reading the length field, the value bytes are accessed\n without checking offset+2+length <= tlv_array_len. A crafted\n length=0xFF on a short buffer causes up to 255 bytes of OOB\n read past the buffer end.\n\nBoth functions are reachable without authentication via\nnfc_llcp_set_remote_gb() which feeds remote LLCP general bytes\ndirectly into nfc_llcp_parse_gb_tlv() with no additional\nvalidation.\n\nFix all three issues by widening offset from u8 to u16 and adding\nbounds checks for both the TLV header and value field before each\naccess.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "0be9de2ea01e8d52646e7310a7eef5459cf07ea8", "status": "affected", "versionType": "git", "lessThan": "2c1456fe09ab1a5a9fe1d8339ca6d509589b56e1" }, { "version": "3df40eb3a2ea58bf404a38f15a7a2768e4762cb0", "status": "affected", "versionType": "git", "lessThan": "7f6f3d087c67a4346189ef2c36481455bbc59a74" }, { "version": "3df40eb3a2ea58bf404a38f15a7a2768e4762cb0", "status": "affected", "versionType": "git", "lessThan": "9c47d667963542c3cf8e3007b7f10c0904d08238" }, { "version": "3df40eb3a2ea58bf404a38f15a7a2768e4762cb0", "status": "affected", "versionType": "git", "lessThan": "a209334ed929941b20810c17c3a507445b0a7c85" }, { "version": "3df40eb3a2ea58bf404a38f15a7a2768e4762cb0", "status": "affected", "versionType": "git", "lessThan": "382eaa770335acf4f16a5a55524500f2bb4207df" }, { "version": "3df40eb3a2ea58bf404a38f15a7a2768e4762cb0", "status": "affected", "versionType": "git", "lessThan": "2d239590d1845a706304833d40dd6d4fec20ad88" }, { "version": "3df40eb3a2ea58bf404a38f15a7a2768e4762cb0", "status": "affected", "versionType": "git", "lessThan": "e84cdfdc4a6c88e8b751144458f2e04e24415a28" }, { "version": "3df40eb3a2ea58bf404a38f15a7a2768e4762cb0", "status": "affected", "versionType": "git", "lessThan": "875285a165fd3b402de2ab3be0deb355d6f4caf5" }, { "version": "3df40eb3a2ea58bf404a38f15a7a2768e4762cb0", "status": "affected", "versionType": "git", "lessThan": "78b20c8eeacd2e44a2d8a4cb5316d3c521d90911" }, { "version": "1deacb5e031e289ca5636f2db4fcae6612c05d34", "status": "affected", "versionType": "git" }, { "version": "66a1be74230bbe098e651766c9a0cf4038db8442", "status": "affected", "versionType": "git" }, { "version": "5.10.188", "status": "affected", "versionType": "semver", "lessThan": "5.10.267" }, { "version": "4.19.291", "status": "affected", "versionType": "semver", "lessThan": "4.20" }, { "version": "5.4.251", "status": "affected", "versionType": "semver", "lessThan": "5.5" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.15", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.15" }, { "version": "5.10.267", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.218", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "6.1.185", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.154", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.12.106", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.12.*" }, { "version": "6.18.47", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.18.*" }, { "version": "7.1.11", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.1.*" }, { "version": "7.2.1", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "7.2.*" }, { "version": "7.3", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }