{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-80799", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.793Z", "datePublished": "2026-09-04T15:13:13.311Z", "dateUpdated": "2026-09-04T15:13:13.311Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-04T15:13:13.311Z" }, "descriptions": [ { "lang": "en", "value": "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": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/nfc/llcp_commands.c" ], "versions": [ { "version": "0be9de2ea01e8d52646e7310a7eef5459cf07ea8", "lessThan": "2c1456fe09ab1a5a9fe1d8339ca6d509589b56e1", "status": "affected", "versionType": "git" }, { "version": "3df40eb3a2ea58bf404a38f15a7a2768e4762cb0", "lessThan": "7f6f3d087c67a4346189ef2c36481455bbc59a74", "status": "affected", "versionType": "git" }, { "version": "3df40eb3a2ea58bf404a38f15a7a2768e4762cb0", "lessThan": "9c47d667963542c3cf8e3007b7f10c0904d08238", "status": "affected", "versionType": "git" }, { "version": "3df40eb3a2ea58bf404a38f15a7a2768e4762cb0", "lessThan": "a209334ed929941b20810c17c3a507445b0a7c85", "status": "affected", "versionType": "git" }, { "version": "3df40eb3a2ea58bf404a38f15a7a2768e4762cb0", "lessThan": "382eaa770335acf4f16a5a55524500f2bb4207df", "status": "affected", "versionType": "git" }, { "version": "3df40eb3a2ea58bf404a38f15a7a2768e4762cb0", "lessThan": "2d239590d1845a706304833d40dd6d4fec20ad88", "status": "affected", "versionType": "git" }, { "version": "3df40eb3a2ea58bf404a38f15a7a2768e4762cb0", "lessThan": "e84cdfdc4a6c88e8b751144458f2e04e24415a28", "status": "affected", "versionType": "git" }, { "version": "3df40eb3a2ea58bf404a38f15a7a2768e4762cb0", "lessThan": "875285a165fd3b402de2ab3be0deb355d6f4caf5", "status": "affected", "versionType": "git" }, { "version": "3df40eb3a2ea58bf404a38f15a7a2768e4762cb0", "lessThan": "78b20c8eeacd2e44a2d8a4cb5316d3c521d90911", "status": "affected", "versionType": "git" }, { "version": "1deacb5e031e289ca5636f2db4fcae6612c05d34", "status": "affected", "versionType": "git" }, { "version": "66a1be74230bbe098e651766c9a0cf4038db8442", "status": "affected", "versionType": "git" }, { "version": "5.10.188", "lessThan": "5.10.267", "status": "affected", "versionType": "semver" }, { "version": "4.19.291", "lessThan": "4.20", "status": "affected", "versionType": "semver" }, { "version": "5.4.251", "lessThan": "5.5", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/nfc/llcp_commands.c" ], "versions": [ { "version": "5.15", "status": "affected" }, { "version": "0", "lessThan": "5.15", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.267", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.218", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.185", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.154", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.106", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.47", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.11", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.1", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3-rc1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.188", "versionEndExcluding": "5.10.267" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "5.15.218" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.1.185" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.6.154" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.12.106" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "6.18.47" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.1.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.2.1" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15", "versionEndExcluding": "7.3-rc1" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.291" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.251" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/2c1456fe09ab1a5a9fe1d8339ca6d509589b56e1" }, { "url": "https://git.kernel.org/stable/c/7f6f3d087c67a4346189ef2c36481455bbc59a74" }, { "url": "https://git.kernel.org/stable/c/9c47d667963542c3cf8e3007b7f10c0904d08238" }, { "url": "https://git.kernel.org/stable/c/a209334ed929941b20810c17c3a507445b0a7c85" }, { "url": "https://git.kernel.org/stable/c/382eaa770335acf4f16a5a55524500f2bb4207df" }, { "url": "https://git.kernel.org/stable/c/2d239590d1845a706304833d40dd6d4fec20ad88" }, { "url": "https://git.kernel.org/stable/c/e84cdfdc4a6c88e8b751144458f2e04e24415a28" }, { "url": "https://git.kernel.org/stable/c/875285a165fd3b402de2ab3be0deb355d6f4caf5" }, { "url": "https://git.kernel.org/stable/c/78b20c8eeacd2e44a2d8a4cb5316d3c521d90911" } ], "title": "nfc: llcp: fix OOB read and u8 offset wrap in TLV parsers", "x_generator": { "engine": "bippy-1.2.0" } } } }