{"api_version":"1","generated_at":"2026-09-20T16:21:36+00:00","cve":"CVE-2026-80802","urls":{"html":"https://cve.report/CVE-2026-80802","api":"https://cve.report/api/cve/CVE-2026-80802.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80802","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80802"},"summary":{"title":"nfc: fdp: bound the device-reported read length and fix an skb leak","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: fdp: bound the device-reported read length and fix an skb leak\n\nfdp_nci_i2c_read() takes the next packet length from two device-supplied\nbytes and never validates it. The value is a u16 used as the\ni2c_master_recv() count into a 261-byte on-stack buffer: a malicious,\ncounterfeit or malfunctioning controller (or an i2c bus interposer) can\ndrive it far past the buffer for a stack out-of-bounds write that\nclobbers the canary and return address, or below the minimum frame size\n(directly, or by truncating the computed sum) so the header/LRC strip\nand the next length read run past a short receive. Reject a length\noutside [FDP_NCI_I2C_MIN_PAYLOAD, FDP_NCI_I2C_MAX_PAYLOAD], as a\ncorrupted packet already is, and force resynchronization.\n\nThe same loop allocates one data skb per iteration and assumes a length\npacket followed by a data packet; a device that sends two data packets\nin one call leaks the first skb when the second allocation overwrites\nit. Free a previously allocated skb before allocating the next.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-04 16:18:07","updated_at":"2026-09-04 16:18:07"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/d9498ab9a78cb63d78dbe4f221d8cc6c91f285ee","name":"https://git.kernel.org/stable/c/d9498ab9a78cb63d78dbe4f221d8cc6c91f285ee","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e5eec121f2c3bc4c7022613bedd9121a8aa4c949","name":"https://git.kernel.org/stable/c/e5eec121f2c3bc4c7022613bedd9121a8aa4c949","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fc3c2bd5b1ec6c7cbc8a50e32d9bcec114f25463","name":"https://git.kernel.org/stable/c/fc3c2bd5b1ec6c7cbc8a50e32d9bcec114f25463","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/db7e464b350969c6ea8340de00d9796e5fd5123b","name":"https://git.kernel.org/stable/c/db7e464b350969c6ea8340de00d9796e5fd5123b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1aa3fc769b0c45bd19f8dab1697084c2b3f6d706","name":"https://git.kernel.org/stable/c/1aa3fc769b0c45bd19f8dab1697084c2b3f6d706","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1fc32327b927a6e2cde086f82575c29880844228","name":"https://git.kernel.org/stable/c/1fc32327b927a6e2cde086f82575c29880844228","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8d2c243b79854628ff076c38748c020042f02f57","name":"https://git.kernel.org/stable/c/8d2c243b79854628ff076c38748c020042f02f57","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0d723090645b82c1cb27cfd7ebf81f0e7c96bcae","name":"https://git.kernel.org/stable/c/0d723090645b82c1cb27cfd7ebf81f0e7c96bcae","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7ad21dcfeb5181af0c3ee2608808c0c0a5283aa1","name":"https://git.kernel.org/stable/c/7ad21dcfeb5181af0c3ee2608808c0c0a5283aa1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80802","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80802","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a06347c04c13e380afce0c9816df51f00b83faf1 d9498ab9a78cb63d78dbe4f221d8cc6c91f285ee git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a06347c04c13e380afce0c9816df51f00b83faf1 1fc32327b927a6e2cde086f82575c29880844228 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a06347c04c13e380afce0c9816df51f00b83faf1 8d2c243b79854628ff076c38748c020042f02f57 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a06347c04c13e380afce0c9816df51f00b83faf1 fc3c2bd5b1ec6c7cbc8a50e32d9bcec114f25463 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a06347c04c13e380afce0c9816df51f00b83faf1 0d723090645b82c1cb27cfd7ebf81f0e7c96bcae git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a06347c04c13e380afce0c9816df51f00b83faf1 db7e464b350969c6ea8340de00d9796e5fd5123b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a06347c04c13e380afce0c9816df51f00b83faf1 e5eec121f2c3bc4c7022613bedd9121a8aa4c949 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a06347c04c13e380afce0c9816df51f00b83faf1 1aa3fc769b0c45bd19f8dab1697084c2b3f6d706 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected a06347c04c13e380afce0c9816df51f00b83faf1 7ad21dcfeb5181af0c3ee2608808c0c0a5283aa1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 4.4","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 4.4 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10.267 5.10.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.218 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.185 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.154 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.106 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.47 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.11 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.1 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"80802","cve":"CVE-2026-80802","epss":"0.001950000","percentile":"0.092850000","score_date":"2026-09-07","updated_at":"2026-09-08 00:05:27"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/nfc/fdp/i2c.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"d9498ab9a78cb63d78dbe4f221d8cc6c91f285ee","status":"affected","version":"a06347c04c13e380afce0c9816df51f00b83faf1","versionType":"git"},{"lessThan":"1fc32327b927a6e2cde086f82575c29880844228","status":"affected","version":"a06347c04c13e380afce0c9816df51f00b83faf1","versionType":"git"},{"lessThan":"8d2c243b79854628ff076c38748c020042f02f57","status":"affected","version":"a06347c04c13e380afce0c9816df51f00b83faf1","versionType":"git"},{"lessThan":"fc3c2bd5b1ec6c7cbc8a50e32d9bcec114f25463","status":"affected","version":"a06347c04c13e380afce0c9816df51f00b83faf1","versionType":"git"},{"lessThan":"0d723090645b82c1cb27cfd7ebf81f0e7c96bcae","status":"affected","version":"a06347c04c13e380afce0c9816df51f00b83faf1","versionType":"git"},{"lessThan":"db7e464b350969c6ea8340de00d9796e5fd5123b","status":"affected","version":"a06347c04c13e380afce0c9816df51f00b83faf1","versionType":"git"},{"lessThan":"e5eec121f2c3bc4c7022613bedd9121a8aa4c949","status":"affected","version":"a06347c04c13e380afce0c9816df51f00b83faf1","versionType":"git"},{"lessThan":"1aa3fc769b0c45bd19f8dab1697084c2b3f6d706","status":"affected","version":"a06347c04c13e380afce0c9816df51f00b83faf1","versionType":"git"},{"lessThan":"7ad21dcfeb5181af0c3ee2608808c0c0a5283aa1","status":"affected","version":"a06347c04c13e380afce0c9816df51f00b83faf1","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/nfc/fdp/i2c.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"4.4"},{"lessThan":"4.4","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.267","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.218","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.185","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.154","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.106","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.47","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.11","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.1","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.267","versionStartIncluding":"4.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.218","versionStartIncluding":"4.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.185","versionStartIncluding":"4.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.154","versionStartIncluding":"4.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.106","versionStartIncluding":"4.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.47","versionStartIncluding":"4.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.11","versionStartIncluding":"4.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.1","versionStartIncluding":"4.4","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"4.4","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: fdp: bound the device-reported read length and fix an skb leak\n\nfdp_nci_i2c_read() takes the next packet length from two device-supplied\nbytes and never validates it. The value is a u16 used as the\ni2c_master_recv() count into a 261-byte on-stack buffer: a malicious,\ncounterfeit or malfunctioning controller (or an i2c bus interposer) can\ndrive it far past the buffer for a stack out-of-bounds write that\nclobbers the canary and return address, or below the minimum frame size\n(directly, or by truncating the computed sum) so the header/LRC strip\nand the next length read run past a short receive. Reject a length\noutside [FDP_NCI_I2C_MIN_PAYLOAD, FDP_NCI_I2C_MAX_PAYLOAD], as a\ncorrupted packet already is, and force resynchronization.\n\nThe same loop allocates one data skb per iteration and assumes a length\npacket followed by a data packet; a device that sends two data packets\nin one call leaks the first skb when the second allocation overwrites\nit. Free a previously allocated skb before allocating the next."}],"providerMetadata":{"dateUpdated":"2026-09-04T15:13:16.241Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/d9498ab9a78cb63d78dbe4f221d8cc6c91f285ee"},{"url":"https://git.kernel.org/stable/c/1fc32327b927a6e2cde086f82575c29880844228"},{"url":"https://git.kernel.org/stable/c/8d2c243b79854628ff076c38748c020042f02f57"},{"url":"https://git.kernel.org/stable/c/fc3c2bd5b1ec6c7cbc8a50e32d9bcec114f25463"},{"url":"https://git.kernel.org/stable/c/0d723090645b82c1cb27cfd7ebf81f0e7c96bcae"},{"url":"https://git.kernel.org/stable/c/db7e464b350969c6ea8340de00d9796e5fd5123b"},{"url":"https://git.kernel.org/stable/c/e5eec121f2c3bc4c7022613bedd9121a8aa4c949"},{"url":"https://git.kernel.org/stable/c/1aa3fc769b0c45bd19f8dab1697084c2b3f6d706"},{"url":"https://git.kernel.org/stable/c/7ad21dcfeb5181af0c3ee2608808c0c0a5283aa1"}],"title":"nfc: fdp: bound the device-reported read length and fix an skb leak","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80802","datePublished":"2026-09-04T15:13:16.241Z","dateReserved":"2026-08-26T14:34:25.794Z","dateUpdated":"2026-09-04T15:13:16.241Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-04 16:18:07","lastModifiedDate":"2026-09-04 16:18:07","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80802","Ordinal":"1","Title":"nfc: fdp: bound the device-reported read length and fix an skb l","CVE":"CVE-2026-80802","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80802","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: fdp: bound the device-reported read length and fix an skb leak\n\nfdp_nci_i2c_read() takes the next packet length from two device-supplied\nbytes and never validates it. The value is a u16 used as the\ni2c_master_recv() count into a 261-byte on-stack buffer: a malicious,\ncounterfeit or malfunctioning controller (or an i2c bus interposer) can\ndrive it far past the buffer for a stack out-of-bounds write that\nclobbers the canary and return address, or below the minimum frame size\n(directly, or by truncating the computed sum) so the header/LRC strip\nand the next length read run past a short receive. Reject a length\noutside [FDP_NCI_I2C_MIN_PAYLOAD, FDP_NCI_I2C_MAX_PAYLOAD], as a\ncorrupted packet already is, and force resynchronization.\n\nThe same loop allocates one data skb per iteration and assumes a length\npacket followed by a data packet; a device that sends two data packets\nin one call leaks the first skb when the second allocation overwrites\nit. Free a previously allocated skb before allocating the next.","Type":"Description","Title":"nfc: fdp: bound the device-reported read length and fix an skb l"}]}}}