CVE-2023-53705

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"baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:N - `ipv6_find_tlv()` parses IPv6 extension-header TLV options directly from sk_buff packet data (CALIPSO/MIP6/fragmentation paths), so the malformed option is delivered via a crafted network packet.\nAC:L - The attacker fully controls the extension-header option bytes and can deterministically craft an option layout that leaves a single trailing byte, triggering the out-of-bounds read reliably.\nPR:N - The vulnerable code processes untrusted IPv6 packets in network paths (labeling, MIP6, tunnel/segmentation) that require no authentication; a locally-triggered variant needs only CAP_NET_RAW obtainable via user namespaces, so the higher-severity choice is no privileges.\nUI:N - Parsing of a received/crafted packet's extension headers happens automatically in the kernel with no victim interaction required.\nS:U - The out-of-bounds access stays within the kernel's own memory and does not cross a security/privilege boundary 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extension-header option bytes and can deterministically craft an option layout that leaves a single trailing byte, triggering the out-of-bounds read reliably.\nPR:N - The vulnerable code processes untrusted IPv6 packets in network paths (labeling, MIP6, tunnel/segmentation) that require no authentication; a locally-triggered variant needs only CAP_NET_RAW obtainable via user namespaces, so the higher-severity choice is no privileges.\nUI:N - Parsing of a received/crafted packet's extension headers happens automatically in the kernel with no victim interaction required.\nS:U - The out-of-bounds access stays within the kernel's own memory and does not cross a security/privilege boundary such as a VM or IOMMU domain.\nC:L - A single out-of-bounds byte of adjacent kernel memory is read; it is strictly bounded to one byte and is only used internally in a comparison that always fails, so it is not disclosed back to the attacker.\nI:N - The defect is a read only (`optlen = nh[offset+1]`); no out-of-bounds write or data modification occurs.\nA:H - The out-of-bounds read can fault when the packet buffer abuts an unmapped page (or trip KASAN/panic_on_warn), producing a kernel oops and denial of service."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "c61a404325093250b676f40ad8f4dd00f3bcab5f", "lessThan": "59e656d0d4a84ea0ee9a39c6f69160a3effccc94", "versionType": "git"}, {"status": "affected", "version": "c61a404325093250b676f40ad8f4dd00f3bcab5f", "lessThan": "04bf69e3de435d793a203aacc4b774f8f9f2baeb", "versionType": "git"}, {"status": "affected", "version": "c61a404325093250b676f40ad8f4dd00f3bcab5f", "lessThan": "011f47c8b8389154f996f5f69da8efc3a3beefef", "versionType": "git"}, {"status": "affected", "version": "c61a404325093250b676f40ad8f4dd00f3bcab5f", "lessThan": "e5f82688ae10f5f386952e65e941bb8868ee54dc", "versionType": "git"}, {"status": 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access.\n\nFound by InfoTeCS on behalf of Linux Verification Center\n(linuxtesting.org) with SVACE."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nipv6: Correcci\u00f3n de acceso fuera de l\u00edmites en ipv6_find_tlv()\n\noptlen se obtiene sin comprobar si hay m\u00e1s de un byte para analizar.\nEsto puede llevar a un acceso fuera de l\u00edmites.\n\nEncontrado por InfoTeCS en nombre del Centro de Verificaci\u00f3n de Linux\n(linuxtesting.org) con SVACE."}], "id": "CVE-2023-53705", "lastModified": "2026-10-28T19:10:00.193", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.2, "baseSeverity": "HIGH", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 4.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2023-53705", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-10-15T21:36:38.329449Z", "version": "2.0.3"}}]}, "published": "2025-10-22T14:15:45.080", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/011f47c8b8389154f996f5f69da8efc3a3beefef"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/04bf69e3de435d793a203aacc4b774f8f9f2baeb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/59e656d0d4a84ea0ee9a39c6f69160a3effccc94"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/878ecb0897f4737a4c9401f3523fd49589025671"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/91dd8aab9c9f193210681b86b6b92840ffe74f0c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9b92e2d0eb696d7586ba832c8854653b59887da0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ae68c0f7edbc9a294094ce03a0aaf45aa489ce40"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e5f82688ae10f5f386952e65e941bb8868ee54dc"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: ipv6: Fix out-of-bounds access in ipv6_find_tlv()", "id": "2405713", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2405713"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2023-53705", "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": "Under investigation", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-10-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53705\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53705\nhttps://lore.kernel.org/linux-cve-announce/2025102212-CVE-2023-53705-38d9@gregkh/T"], "threat_severity": "Important"}

{"created": "2025-10-23T10:05:11.039484+00:00", "updated": "2025-10-23T10:05:11.039510+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}