{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-42247", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-30T07:40:12.254Z", "datePublished": "2024-08-07T15:14:32.232Z", "dateUpdated": "2026-08-05T11:36:02.565Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:36:02.565Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwireguard: allowedips: avoid unaligned 64-bit memory accesses\n\nOn the parisc platform, the kernel issues kernel warnings because\nswap_endian() tries to load a 128-bit IPv6 address from an unaligned\nmemory location:\n\n Kernel: unaligned access to 0x55f4688c in wg_allowedips_insert_v6+0x2c/0x80 [wireguard] (iir 0xf3010df)\n Kernel: unaligned access to 0x55f46884 in wg_allowedips_insert_v6+0x38/0x80 [wireguard] (iir 0xf2010dc)\n\nAvoid such unaligned memory accesses by instead using the\nget_unaligned_be64() helper macro.\n\n[Jason: replace src[8] in original patch with src+8]" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:N - The same `swap_endian()` 128-bit path is executed on remotely-supplied IPv6 header bytes via `wg_allowedips_lookup_src()` on every decrypted inbound packet (receive.c:404) and via `wg_allowedips_lookup_dst()` in `wg_xmit()` for traffic a WireGuard gateway forwards into a tunnel, so received network packets reach the defect without local access.\nAC:L - On an affected architecture the misalignment is a deterministic property of netlink attribute padding and skb header placement, so every insert or IPv6 lookup triggers it with no race, memory-layout grooming, or victim state required.\nPR:N - On a WireGuard routing gateway an unauthenticated off-path sender whose packets are forwarded into the tunnel drives `wg_allowedips_lookup_dst()` with no credentials at all; the alternative paths need only an authenticated peer or namespaced CAP_NET_ADMIN obtainable via `unshare -Urn`, so the higher of these is None.\nUI:N - The vulnerable code runs entirely in the kernel's packet transmit/receive and netlink configuration paths; no administrator or user action is needed beyond a WireGuard interface being configured.\nS:U - The fault and its consequences are confined to the kernel of the affected host, with no crossing of a VM, IOMMU, or sandbox authority boundary.\nC:N - The unaligned loads read only within a length-validated 16-byte `in6_addr`/netlink attribute or a bounds-checked IPv6 header, so no out-of-bounds data is read and nothing is disclosed to the attacker.\nI:N - There is no out-of-bounds or attacker-influenced write; on architectures with a fixup handler the emulated load yields the correct value, leaving the allowedips trie and all other kernel state intact.\nA:H - On architectures lacking hardware unaligned 64-bit access the load raises a kernel-mode alignment abort, and where no fixup handler exists (ARM without CONFIG_ALIGNMENT_TRAP, or parisc when emulation fails via `die_if_kernel`) this becomes an unrecoverable oops; even when emulated, a remote packet flow forces a trap per packet, degrading the system." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/wireguard/allowedips.c" ], "versions": [ { "version": "e7096c131e5161fa3b8e52a650d7719d2857adfd", "lessThan": "ae630de24efb123d7199a43256396d7758f4cb75", "status": "affected", "versionType": "git" }, { "version": "e7096c131e5161fa3b8e52a650d7719d2857adfd", "lessThan": "b4764f0ad3d68de8a0b847c05f427afb86dd54e6", "status": "affected", "versionType": "git" }, { "version": "e7096c131e5161fa3b8e52a650d7719d2857adfd", "lessThan": "217978a29c6ceca76d3c640bf94bdf50c268d801", "status": "affected", "versionType": "git" }, { "version": "e7096c131e5161fa3b8e52a650d7719d2857adfd", "lessThan": "6638a203abad35fa636d59ac47bdbc4bc100fd74", "status": "affected", "versionType": "git" }, { "version": "e7096c131e5161fa3b8e52a650d7719d2857adfd", "lessThan": "2fb34bf76431e831f9863cd59adc0bd1f67b0fbf", "status": "affected", "versionType": "git" }, { "version": "e7096c131e5161fa3b8e52a650d7719d2857adfd", "lessThan": "948f991c62a4018fb81d85804eeab3029c6209f8", "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/net/wireguard/allowedips.c" ], "versions": [ { "version": "5.6", "status": "affected" }, { "version": "0", "lessThan": "5.6", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.222", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.163", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.100", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.41", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.9.10", "lessThanOrEqual": "6.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10", "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": "5.6", "versionEndExcluding": "5.10.222" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "5.15.163" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.1.100" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.6.41" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.9.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.6", "versionEndExcluding": "6.10" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/ae630de24efb123d7199a43256396d7758f4cb75" }, { "url": "https://git.kernel.org/stable/c/b4764f0ad3d68de8a0b847c05f427afb86dd54e6" }, { "url": "https://git.kernel.org/stable/c/217978a29c6ceca76d3c640bf94bdf50c268d801" }, { "url": "https://git.kernel.org/stable/c/6638a203abad35fa636d59ac47bdbc4bc100fd74" }, { "url": "https://git.kernel.org/stable/c/2fb34bf76431e831f9863cd59adc0bd1f67b0fbf" }, { "url": "https://git.kernel.org/stable/c/948f991c62a4018fb81d85804eeab3029c6209f8" } ], "title": "wireguard: allowedips: avoid unaligned 64-bit memory accesses", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-42247", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T16:13:28.429050Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:34:31.003Z" } }, { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T22:02:49.575Z" } } ] } }