{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-23339", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:45.997Z", "datePublished": "2026-03-25T10:27:28.073Z", "dateUpdated": "2026-05-11T22:04:55.743Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T22:04:55.743Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: nci: free skb on nci_transceive early error paths\n\nnci_transceive() takes ownership of the skb passed by the caller,\nbut the -EPROTO, -EINVAL, and -EBUSY error paths return without\nfreeing it.\n\nDue to issues clearing NCI_DATA_EXCHANGE fixed by subsequent changes\nthe nci/nci_dev selftest hits the error path occasionally in NIPA,\nand kmemleak detects leaks:\n\nunreferenced object 0xff11000015ce6a40 (size 640):\n comm \"nci_dev\", pid 3954, jiffies 4295441246\n hex dump (first 32 bytes):\n 6b 6b 6b 6b 00 a4 00 0c 02 e1 03 6b 6b 6b 6b 6b kkkk.......kkkkk\n 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk\n backtrace (crc 7c40cc2a):\n kmem_cache_alloc_node_noprof+0x492/0x630\n __alloc_skb+0x11e/0x5f0\n alloc_skb_with_frags+0xc6/0x8f0\n sock_alloc_send_pskb+0x326/0x3f0\n nfc_alloc_send_skb+0x94/0x1d0\n rawsock_sendmsg+0x162/0x4c0\n do_syscall_64+0x117/0xfc0"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/nfc/nci/core.c"], "versions": [{"version": "6a2968aaf50c7a22fced77a5e24aa636281efca8", "lessThan": "b367cb44d919f35b07cd56feffa15e68cd9f53f9", "status": "affected", "versionType": "git"}, {"version": "6a2968aaf50c7a22fced77a5e24aa636281efca8", "lessThan": "6d898f943766440cf766d30364e715111c3563b5", "status": 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"vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/nfc/nci/core.c"], "versions": [{"version": "3.2", "status": "affected"}, {"version": "0", "lessThan": "3.2", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.253", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.167", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.130", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.77", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.17", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.7", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "3.2", "versionEndExcluding": "5.10.253"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "5.15.203"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "6.1.167"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "6.6.130"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.2", "versionEndExcluding": "6.12.77"}, {"vulnerable": true, "criteria": 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"https://git.kernel.org/stable/c/54f7f0eaafa56b5994cdb5c7967946922c2e1d22"}, {"url": "https://git.kernel.org/stable/c/7bd4b0c4779f978a6528c9b7937d2ca18e936e2c"}], "title": "nfc: nci: free skb on nci_transceive early error paths", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A8136AA8-F2F0-4960-9AAF-176AC6ACEA92", "versionEndExcluding": "5.10.253", "versionStartIncluding": "3.2.1", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "20DDB3E9-AABF-4107-ADB0-5362AA067045", "versionEndExcluding": "5.15.203", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "2EDC6BAF-B710-4E26-B6AA-D68922EE7B43", "versionEndExcluding": "6.1.167", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C57BB918-DF28-46B3-94F7-144176841267", "versionEndExcluding": "6.6.130", "versionStartIncluding": "6.2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "B3D12E00-E42D-4056-B354-BAD4903C03A5", "versionEndExcluding": "6.12.77", "versionStartIncluding": "6.7", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A5E006E4-59C7-43C1-9231-62A72219F2BA", "versionEndExcluding": "6.18.17", "versionStartIncluding": "6.13", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "69245D10-0B71-485E-80C3-A64F077004D3", "versionEndExcluding": "6.19.7", "versionStartIncluding": "6.19", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:3.2:-:*:*:*:*:*:*", "matchCriteriaId": "2BEBAC7C-43AE-4D02-A957-26F89F27E0AC", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*", "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*", "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*", "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*", "matchCriteriaId": "512EE3A8-A590-4501-9A94-5D4B268D6138", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnfc: nci: free skb on nci_transceive early error paths\n\nnci_transceive() takes ownership of the skb passed by the caller,\nbut the -EPROTO, -EINVAL, and -EBUSY error paths return without\nfreeing it.\n\nDue to issues clearing NCI_DATA_EXCHANGE fixed by subsequent changes\nthe nci/nci_dev selftest hits the error path occasionally in NIPA,\nand kmemleak detects leaks:\n\nunreferenced object 0xff11000015ce6a40 (size 640):\n comm \"nci_dev\", pid 3954, jiffies 4295441246\n hex dump (first 32 bytes):\n 6b 6b 6b 6b 00 a4 00 0c 02 e1 03 6b 6b 6b 6b 6b kkkk.......kkkkk\n 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk\n backtrace (crc 7c40cc2a):\n kmem_cache_alloc_node_noprof+0x492/0x630\n __alloc_skb+0x11e/0x5f0\n alloc_skb_with_frags+0xc6/0x8f0\n sock_alloc_send_pskb+0x326/0x3f0\n nfc_alloc_send_skb+0x94/0x1d0\n rawsock_sendmsg+0x162/0x4c0\n do_syscall_64+0x117/0xfc0"}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nnfc: nci: liberar skb en las rutas de error tempranas de nci_transceive\n\nnci_transceive() toma posesi\u00f3n del skb pasado por el llamador,\npero las rutas de error -EPROTO, -EINVAL y -EBUSY regresan sin\nliberarlo.\n\nDebido a problemas al limpiar NCI_DATA_EXCHANGE corregidos por cambios posteriores,\nla autoprueba nci/nci_dev alcanza la ruta de error ocasionalmente en NIPA,\ny kmemleak detecta fugas:\n\nobjeto sin referencia 0xff11000015ce6a40 (tama\u00f1o 640):\n comm 'nci_dev', pid 3954, jiffies 4295441246\n volcado hexadecimal (primeros 32 bytes):\n 6b 6b 6b 6b 00 a4 00 0c 02 e1 03 6b 6b 6b 6b 6b kkkk.......kkkkk\n 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk\n backtrace (crc 7c40cc2a):\n kmem_cache_alloc_node_noprof+0x492/0x630\n __alloc_skb+0x11e/0x5f0\n alloc_skb_with_frags+0xc6/0x8f0\n sock_alloc_send_pskb+0x326/0x3f0\n nfc_alloc_send_skb+0x94/0x1d0\n rawsock_sendmsg+0x162/0x4c0\n do_syscall_64+0x117/0xfc0"}], "id": "CVE-2026-23339", "lastModified": "2026-04-23T21:17:17.730", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2026-03-25T11:16:31.670", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/3245801d44a44c090acefe19a12d22d12cac45c5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/33f6b8a96dda045789796c3bcb451c74ac158039"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/54f7f0eaafa56b5994cdb5c7967946922c2e1d22"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6d898f943766440cf766d30364e715111c3563b5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7bd4b0c4779f978a6528c9b7937d2ca18e936e2c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9d448bbab724b94d6c561e1f314656f5b88a7cb3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b367cb44d919f35b07cd56feffa15e68cd9f53f9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/dcbcccfc5195c9caaa4bb8d31f23c345f00a9e89"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-401"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: nfc: nci: free skb on nci_transceive early error paths", "id": "2451268", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2451268"}, "csaw": false, "cwe": "CWE-772", "details": ["A flaw was found in the Linux kernel's Near Field Communication (NFC) subsystem. When the `nci_transceive()` function encounters certain error conditions, it fails to properly free allocated kernel memory. This memory leak can accumulate over time, potentially leading to resource exhaustion and affecting system stability."], "name": "CVE-2026-23339", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-03-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-23339\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-23339\nhttps://lore.kernel.org/linux-cve-announce/2026032534-CVE-2026-23339-263f@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6a2968aaf50c7a22fced77a5e24aa636281efca8,33f6b8a96dda045789796c3bcb451c74ac158039)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6a2968aaf50c7a22fced77a5e24aa636281efca8,54f7f0eaafa56b5994cdb5c7967946922c2e1d22)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6a2968aaf50c7a22fced77a5e24aa636281efca8,7bd4b0c4779f978a6528c9b7937d2ca18e936e2c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6a2968aaf50c7a22fced77a5e24aa636281efca8,9d448bbab724b94d6c561e1f314656f5b88a7cb3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6a2968aaf50c7a22fced77a5e24aa636281efca8,dcbcccfc5195c9caaa4bb8d31f23c345f00a9e89)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[6a2968aaf50c7a22fced77a5e24aa636281efca8,3245801d44a44c090acefe19a12d22d12cac45c5)"}}], "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": "generic", "value": "3.2"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,3.2)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.167,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.130,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.77,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.17,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.7,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0-rc3,*]"}}], "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"}], "analysis": {"en": {"generated_at": "2026-04-29T00:41:41.704127+00:00", "value": {"mitigation_remediation": ["Update the kernel to a version that includes the patch for nci_transceive error handling.", "Disable the NFC NCI driver (nci_dev) or block access to NFC devices to prevent interaction.", "Run kmemleak or monitor system memory usage to detect unreleased buffers and identify potential exploitation."], "summary": {"action": "Apply Patch", "impact": "Memory Leak (Resource Exhaustion)"}, "threat_synthesis": {"affected_systems": "Any Linux kernel build that incorporates the unpatched NFC NCI driver is affected; all kernel versions prior to the commit that implements the fix are vulnerable. The provided CPE strings indicate that kernels from 3.2 onward, including early release candidates of 7.0, are at risk, meaning many embedded devices and general-purpose systems that enable NFC support could be impacted.", "description_and_impact": "The Linux kernel\u2019s NFC NCI subsystem contains a flaw where nci_transceive() accepts a socket buffer from the caller and is responsible for freeing it on normal return, but when the function exits due to protocol, input validation, or busy errors it fails to release the buffer. This omission results in unreleased kernel memory, as identified by kmemleak, and exemplifies the CWE-401 and CWE-772 weaknesses. Over time repeated invocations of these error paths can consume system memory, potentially leading to instability or crashes, but do not provide a remote code execution path.", "risk_and_exploitability": "The EPSS score indicates less than 1% probability of exploitation, and the vulnerability is not listed in CISA\u2019s KEV catalog, suggesting limited active targeting. Based on the description, the likely attack vector is a local or device\u2011level attacker sending malformed NFC frames or triggering the NIPA selftest to repeatedly exercise the error paths. While there is no remote code execution capability, persistent memory exhaustion can lead to a denial\u2011of\u2011service condition. The CVSS score of 5.5 reflects this moderate severity."}}}}, "created": "2026-03-25T21:32:15.087445+00:00", "updated": "2026-04-29T00:45:26.166569+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}