{"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"}}}}