{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-80823", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.795Z", "datePublished": "2026-09-04T15:27:46.153Z", "dateUpdated": "2026-10-19T08:44:15.864Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:44:15.864Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: st21nfca: validate ATR_REQ length against the received frame\n\nst21nfca_tm_recv_atr_req() checks that the received ATR_REQ frame is at\nleast ST21NFCA_ATR_REQ_MIN_SIZE and that the self-declared atr_req->length\nis at least sizeof(struct st21nfca_atr_req), but never checks that\natr_req->length does not exceed the actual received length (skb->len).\n\nst21nfca_tm_send_atr_res() then trusts the declared length:\n\n\tgb_len = atr_req->length - sizeof(struct st21nfca_atr_req);\n\t...\n\tmemcpy(atr_res->gbi, atr_req->gbi, gb_len);\n\nso an RF peer that sends a short frame but sets atr_req->length larger\nthan the frame makes gb_len exceed the general bytes actually present,\nand the memcpy reads out of bounds past the received skb. Those bytes are\nplaced in the ATR_RES and sent back to the peer (kernel-memory disclosure\nto a proximity attacker); a larger declared length is an out-of-bounds\nread (DoS).\n\nReject frames whose declared length exceeds the received length. The\nadjacent nfc_tm_activated() path in the same function already derives its\ngeneral-bytes length from skb->len rather than the declared field.\n\nFound by 0sec (https://0sec.ai) using automated source analysis; the\nmissing bound is evident from source. Compile-tested." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/nfc/st21nfca/dep.c" ], "versions": [ { "version": "1892bf844ea0261736bd5e75546fc996e9daeedf", "lessThan": "785df00bb3ae3206674a43284eb06dac575b5c64", "status": "affected", "versionType": "git" }, { "version": "1892bf844ea0261736bd5e75546fc996e9daeedf", "lessThan": "2c1ad291f4cdc357f9527b688c6fda9c6ffa7890", "status": "affected", "versionType": "git" }, { "version": "1892bf844ea0261736bd5e75546fc996e9daeedf", "lessThan": "dd26d30f40c43ad9cfe2f25c6ea0ead1dd51d5aa", "status": "affected", "versionType": "git" }, { "version": "1892bf844ea0261736bd5e75546fc996e9daeedf", "lessThan": "9635507fe82949e429b3cd938876a9917125b151", "status": "affected", "versionType": "git" }, { "version": "1892bf844ea0261736bd5e75546fc996e9daeedf", "lessThan": "0f344944c506b4f02d2b098489f7268b438c369e", "status": "affected", "versionType": "git" }, { "version": "1892bf844ea0261736bd5e75546fc996e9daeedf", "lessThan": "bfcca5f42c9aa4eadef1e5fe7bb23783d7fcc96d", "status": "affected", "versionType": "git" }, { "version": "1892bf844ea0261736bd5e75546fc996e9daeedf", "lessThan": "304f5b414f4051d324b8c4a3ab0e79f7dc7e150e", "status": "affected", "versionType": "git" }, { "version": "1892bf844ea0261736bd5e75546fc996e9daeedf", "lessThan": "f33cecf69095c43be88567fef92b180b858f7369", "status": "affected", "versionType": "git" }, { "version": "1892bf844ea0261736bd5e75546fc996e9daeedf", "lessThan": "5cdcca5d62a66eda6b774110a44cba67bc1a8d1d", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/nfc/st21nfca/dep.c" ], "versions": [ { "version": "3.17", "status": "affected" }, { "version": "0", "lessThan": "3.17", "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", "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": "3.17", "versionEndExcluding": "5.10.267" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "5.15.218" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "6.1.185" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "6.6.154" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "6.12.106" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "6.18.47" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "7.1.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "7.2.1" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.17", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/785df00bb3ae3206674a43284eb06dac575b5c64" }, { "url": "https://git.kernel.org/stable/c/2c1ad291f4cdc357f9527b688c6fda9c6ffa7890" }, { "url": "https://git.kernel.org/stable/c/dd26d30f40c43ad9cfe2f25c6ea0ead1dd51d5aa" }, { "url": "https://git.kernel.org/stable/c/9635507fe82949e429b3cd938876a9917125b151" }, { "url": "https://git.kernel.org/stable/c/0f344944c506b4f02d2b098489f7268b438c369e" }, { "url": "https://git.kernel.org/stable/c/bfcca5f42c9aa4eadef1e5fe7bb23783d7fcc96d" }, { "url": "https://git.kernel.org/stable/c/304f5b414f4051d324b8c4a3ab0e79f7dc7e150e" }, { "url": "https://git.kernel.org/stable/c/f33cecf69095c43be88567fef92b180b858f7369" }, { "url": "https://git.kernel.org/stable/c/5cdcca5d62a66eda6b774110a44cba67bc1a8d1d" } ], "title": "nfc: st21nfca: validate ATR_REQ length against the received frame", "x_generator": { "engine": "bippy-1.2.0" } } } }