{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2023-53705", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-10-22T13:21:37.346Z", "datePublished": "2025-10-22T13:23:42.641Z", "dateUpdated": "2026-08-05T09:15:37.219Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:15:37.219Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: Fix out-of-bounds access in ipv6_find_tlv()\n\noptlen is fetched without checking whether there is more than one byte to parse.\nIt can lead to out-of-bounds access.\n\nFound by InfoTeCS on behalf of Linux Verification Center\n(linuxtesting.org) with SVACE." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H", "baseScore": 8.2, "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 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": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/ipv6/exthdrs_core.c" ], "versions": [ { "version": "c61a404325093250b676f40ad8f4dd00f3bcab5f", "lessThan": "59e656d0d4a84ea0ee9a39c6f69160a3effccc94", "status": "affected", "versionType": "git" }, { "version": "c61a404325093250b676f40ad8f4dd00f3bcab5f", "lessThan": "04bf69e3de435d793a203aacc4b774f8f9f2baeb", "status": "affected", "versionType": "git" }, { "version": "c61a404325093250b676f40ad8f4dd00f3bcab5f", "lessThan": "011f47c8b8389154f996f5f69da8efc3a3beefef", "status": "affected", "versionType": "git" }, { "version": "c61a404325093250b676f40ad8f4dd00f3bcab5f", "lessThan": "e5f82688ae10f5f386952e65e941bb8868ee54dc", "status": "affected", "versionType": "git" }, { "version": "c61a404325093250b676f40ad8f4dd00f3bcab5f", "lessThan": "9b92e2d0eb696d7586ba832c8854653b59887da0", "status": "affected", "versionType": "git" }, { "version": "c61a404325093250b676f40ad8f4dd00f3bcab5f", "lessThan": "91dd8aab9c9f193210681b86b6b92840ffe74f0c", "status": "affected", "versionType": "git" }, { "version": "c61a404325093250b676f40ad8f4dd00f3bcab5f", "lessThan": "ae68c0f7edbc9a294094ce03a0aaf45aa489ce40", "status": "affected", "versionType": "git" }, { "version": "c61a404325093250b676f40ad8f4dd00f3bcab5f", "lessThan": "878ecb0897f4737a4c9401f3523fd49589025671", "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/ipv6/exthdrs_core.c" ], "versions": [ { "version": "2.6.19", "status": "affected" }, { "version": "0", "lessThan": "2.6.19", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.316", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.284", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.244", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.181", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.114", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.31", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.3.5", "lessThanOrEqual": "6.3.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.4", "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": "2.6.19", "versionEndExcluding": "4.14.316" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.19", "versionEndExcluding": "4.19.284" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.19", "versionEndExcluding": "5.4.244" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.19", "versionEndExcluding": "5.10.181" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.19", "versionEndExcluding": "5.15.114" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.19", "versionEndExcluding": "6.1.31" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.19", "versionEndExcluding": "6.3.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.19", "versionEndExcluding": "6.4" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/59e656d0d4a84ea0ee9a39c6f69160a3effccc94" }, { "url": "https://git.kernel.org/stable/c/04bf69e3de435d793a203aacc4b774f8f9f2baeb" }, { "url": "https://git.kernel.org/stable/c/011f47c8b8389154f996f5f69da8efc3a3beefef" }, { "url": "https://git.kernel.org/stable/c/e5f82688ae10f5f386952e65e941bb8868ee54dc" }, { "url": "https://git.kernel.org/stable/c/9b92e2d0eb696d7586ba832c8854653b59887da0" }, { "url": "https://git.kernel.org/stable/c/91dd8aab9c9f193210681b86b6b92840ffe74f0c" }, { "url": "https://git.kernel.org/stable/c/ae68c0f7edbc9a294094ce03a0aaf45aa489ce40" }, { "url": "https://git.kernel.org/stable/c/878ecb0897f4737a4c9401f3523fd49589025671" } ], "title": "ipv6: Fix out-of-bounds access in ipv6_find_tlv()", "x_generator": { "engine": "bippy-1.2.0" } } } }