CVE-2026-90223

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-90223", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.794Z", "datePublished": "2026-09-17T16:07:33.355Z", "dateUpdated": "2026-10-19T08:59:59.669Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:59:59.669Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: llcp: bound SNL TLV parsing to the skb and add length checks\n\nnfc_llcp_recv_snl() walked the SNL TLV list using a u16 offset/length\npair derived from skb->len, without bounding reads to the actual skb\ndata. Three problems followed:\n\n - For a short frame (skb->len < LLCP_HEADER_SIZE), tlv_len underflowed.\n - The per-TLV header (type, length) was read without checking that two\n bytes remained.\n - A declared TLV length could run past the end of the buffer, and an\n SDREQ with length == 0 made \"service_name_len = length - 1\" underflow\n (size_t), driving an out-of-bounds read in the following strncmp() /\n nfc_llcp_sock_from_sn(). The SDRES case likewise read tlv[2]/tlv[3]\n without a length check.\n\nA nearby NFC device can reach this without authentication; LLCP link\nactivation happens automatically after NFC-DEP.\n\nWalk the TLV list by pointer, bounded by skb_tail_pointer() over the\nlinear skb data, and validate each TLV declared length before use. Add\nexplicit length checks for SDREQ (>= 1) and SDRES (exactly 2).\n\nFound by 0sec automated security-research tooling (https://0sec.ai)."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:A - A nearby NFC-DEP peer supplies the malformed bytes in an LLCP SNL PDU (ptype LLCP_PDU_SNL, DSAP/SSAP LLCP_SAP_SDP). nfc_tm_data_received() or the initiator nfc_llcp_recv() callback delivers that skb through __nfc_llcp_recv() and nfc_llcp_rx_skb() into nfc_llcp_recv_snl(), which walks attacker-controlled SDREQ/SDRES TLVs. NFC is radio-range, so Adjacent.\nAC:L - The attacker fully controls the SNL payload, including each TLV type and u8 length. An SDREQ with length 0 or 15, or a declared length past the remaining skb, hits the missing header/value checks in nfc_llcp_recv_snl() deterministically, with no race or heap layout the attacker cannot set.\nPR:N - nfc_llcp_recv_snl() only rejects PDUs whose DSAP/SSAP are not LLCP_SAP_SDP; it does not require LLCP CONNECT, SDP credentials, or any host account. After nfc_dep_link_is_up(), an unauthenticated NFC-DEP peer can send SNL immediately.\nUI:N - nfc_tm_activated() calls nfc_dep_link_is_up() automatically when protocol is NFC_PROTO_NFC_DEP_MASK, after which nfc_tm_data_received() hands DEP payloads to LLCP. The attacker triggers the SNL parse with their own frames; no extra victim click, mount, or dialog is required.\nS:U - nfc_llcp_recv_snl() over-reads kernel memory adjacent to the received skb in the LLCP receive path. That stays inside the host kernel's security authority; there is no VM, IOMMU, or sandbox boundary crossed.\nC:L - A short SDREQ with length==15 makes strncmp(service_name, \"urn:nfc:sn:sdp\", 14) read up to 14 bytes past the skb, and length==0 uses out-of-bounds tlv[2] as the tid echoed by nfc_llcp_build_sdres_tlv(). nfc_llcp_sock_from_sn() memcmp is gated on matching socket name length, so this is a small bounded leak, not an arbitrary read.\nI:N - The SNL walker only reads past the skb; it does not write past it. The SDRES path assigns tlv[3] into an existing pending nfc_llcp_sdp_tlv->sap on a tid match, which is an in-object protocol field a well-formed SDRES can already set, not a kernel write primitive.\nA:H - nfc_llcp_recv_snl() can read tlv[0]/tlv[1] when fewer than two bytes remain, and strncmp()/tlv[2] past the skb tail. Those over-reads can fault on an unmapped page or KFENCE guard and oops the kernel."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/nfc/llcp_core.c"], "versions": [{"version": "19cfe5843e86cc95542d9d875c9386e197956d75", "lessThan": "88b36d36e12c9ba76decdb580d9c1907c084e587", "status": "affected", "versionType": "git"}, {"version": "19cfe5843e86cc95542d9d875c9386e197956d75", "lessThan": "587fc2a5a35b41883b22b8f808fe5d345208914b", "status": "affected", "versionType": "git"}, {"version": "19cfe5843e86cc95542d9d875c9386e197956d75", "lessThan": "f04ac9bf2379f3e2470c400c235eb12f74891bef", "status": "affected", "versionType": "git"}, {"version": "19cfe5843e86cc95542d9d875c9386e197956d75", "lessThan": "02030f95820c42431280f4f945ff34247fb840ff", "status": "affected", "versionType": "git"}, {"version": "19cfe5843e86cc95542d9d875c9386e197956d75", "lessThan": "99fdb5c2522f365efa199d0117b641e35097041e", "status": "affected", "versionType": "git"}, {"version": "19cfe5843e86cc95542d9d875c9386e197956d75", "lessThan": "749a9048bf51a668ec3ab6c0392ba32325607281", "status": "affected", "versionType": "git"}, {"version": "19cfe5843e86cc95542d9d875c9386e197956d75", "lessThan": "eeb16fb24cfe67947b832fd9ada5f488afc72579", "status": "affected", "versionType": "git"}, {"version": "19cfe5843e86cc95542d9d875c9386e197956d75", "lessThan": "f4c7f37f0ab990952539dc68d931d65c3657600a", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/nfc/llcp_core.c"], "versions": [{"version": "3.8", "status": "affected"}, {"version": "0", "lessThan": "3.8", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.52", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.6", "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": "3.8", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "6.18.52"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "7.2.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.8", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/88b36d36e12c9ba76decdb580d9c1907c084e587"}, {"url": "https://git.kernel.org/stable/c/587fc2a5a35b41883b22b8f808fe5d345208914b"}, {"url": "https://git.kernel.org/stable/c/f04ac9bf2379f3e2470c400c235eb12f74891bef"}, {"url": "https://git.kernel.org/stable/c/02030f95820c42431280f4f945ff34247fb840ff"}, {"url": "https://git.kernel.org/stable/c/99fdb5c2522f365efa199d0117b641e35097041e"}, {"url": "https://git.kernel.org/stable/c/749a9048bf51a668ec3ab6c0392ba32325607281"}, {"url": "https://git.kernel.org/stable/c/eeb16fb24cfe67947b832fd9ada5f488afc72579"}, {"url": "https://git.kernel.org/stable/c/f4c7f37f0ab990952539dc68d931d65c3657600a"}], "title": "nfc: llcp: bound SNL TLV parsing to the skb and add length checks", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/nfc/llcp_core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "88b36d36e12c9ba76decdb580d9c1907c084e587", "status": "affected", "version": "19cfe5843e86cc95542d9d875c9386e197956d75", "versionType": "git"}, {"lessThan": "587fc2a5a35b41883b22b8f808fe5d345208914b", "status": "affected", "version": "19cfe5843e86cc95542d9d875c9386e197956d75", "versionType": "git"}, {"lessThan": "f04ac9bf2379f3e2470c400c235eb12f74891bef", "status": "affected", "version": "19cfe5843e86cc95542d9d875c9386e197956d75", "versionType": "git"}, {"lessThan": "02030f95820c42431280f4f945ff34247fb840ff", "status": "affected", "version": "19cfe5843e86cc95542d9d875c9386e197956d75", "versionType": "git"}, {"lessThan": "99fdb5c2522f365efa199d0117b641e35097041e", "status": "affected", "version": "19cfe5843e86cc95542d9d875c9386e197956d75", "versionType": "git"}, {"lessThan": "749a9048bf51a668ec3ab6c0392ba32325607281", "status": "affected", "version": "19cfe5843e86cc95542d9d875c9386e197956d75", "versionType": "git"}, {"lessThan": "eeb16fb24cfe67947b832fd9ada5f488afc72579", "status": "affected", "version": "19cfe5843e86cc95542d9d875c9386e197956d75", "versionType": "git"}, {"lessThan": "f4c7f37f0ab990952539dc68d931d65c3657600a", "status": "affected", "version": "19cfe5843e86cc95542d9d875c9386e197956d75", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/nfc/llcp_core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.8"}, {"lessThan": "3.8", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.270", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.221", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.188", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.157", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.52", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.6", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: llcp: bound SNL TLV parsing to the skb and add length checks\n\nnfc_llcp_recv_snl() walked the SNL TLV list using a u16 offset/length\npair derived from skb->len, without bounding reads to the actual skb\ndata. Three problems followed:\n\n - For a short frame (skb->len < LLCP_HEADER_SIZE), tlv_len underflowed.\n - The per-TLV header (type, length) was read without checking that two\n bytes remained.\n - A declared TLV length could run past the end of the buffer, and an\n SDREQ with length == 0 made \"service_name_len = length - 1\" underflow\n (size_t), driving an out-of-bounds read in the following strncmp() /\n nfc_llcp_sock_from_sn(). The SDRES case likewise read tlv[2]/tlv[3]\n without a length check.\n\nA nearby NFC device can reach this without authentication; LLCP link\nactivation happens automatically after NFC-DEP.\n\nWalk the TLV list by pointer, bounded by skb_tail_pointer() over the\nlinear skb data, and validate each TLV declared length before use. Add\nexplicit length checks for SDREQ (>= 1) and SDRES (exactly 2).\n\nFound by 0sec automated security-research tooling (https://0sec.ai)."}], "id": "CVE-2026-90223", "lastModified": "2026-10-19T09:19:12.510", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 4.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-17T17:17:17.850", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/02030f95820c42431280f4f945ff34247fb840ff"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/587fc2a5a35b41883b22b8f808fe5d345208914b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/749a9048bf51a668ec3ab6c0392ba32325607281"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/88b36d36e12c9ba76decdb580d9c1907c084e587"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/99fdb5c2522f365efa199d0117b641e35097041e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/eeb16fb24cfe67947b832fd9ada5f488afc72579"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f04ac9bf2379f3e2470c400c235eb12f74891bef"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f4c7f37f0ab990952539dc68d931d65c3657600a"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[19cfe5843e86cc95542d9d875c9386e197956d75,88b36d36e12c9ba76decdb580d9c1907c084e587)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[19cfe5843e86cc95542d9d875c9386e197956d75,587fc2a5a35b41883b22b8f808fe5d345208914b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[19cfe5843e86cc95542d9d875c9386e197956d75,f04ac9bf2379f3e2470c400c235eb12f74891bef)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[19cfe5843e86cc95542d9d875c9386e197956d75,02030f95820c42431280f4f945ff34247fb840ff)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[19cfe5843e86cc95542d9d875c9386e197956d75,99fdb5c2522f365efa199d0117b641e35097041e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[19cfe5843e86cc95542d9d875c9386e197956d75,749a9048bf51a668ec3ab6c0392ba32325607281)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[19cfe5843e86cc95542d9d875c9386e197956d75,eeb16fb24cfe67947b832fd9ada5f488afc72579)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[19cfe5843e86cc95542d9d875c9386e197956d75,f4c7f37f0ab990952539dc68d931d65c3657600a)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "3.8"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,3.8)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.270,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.221,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.188,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.157,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.110,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.52,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.6,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-19T03:15:16.987731+00:00", "updated": "2026-09-20T02:45:18.434314+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-120"]}