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CVE-2024-42247 (GCVE-0-2024-42247)

Vulnerability from cvelistv5 – Published: 2024-08-07 15:14 – Updated: 2026-08-05 11:36
VLAI
Title
wireguard: allowedips: avoid unaligned 64-bit memory accesses
Summary
In the Linux kernel, the following vulnerability has been resolved: wireguard: allowedips: avoid unaligned 64-bit memory accesses On the parisc platform, the kernel issues kernel warnings because swap_endian() tries to load a 128-bit IPv6 address from an unaligned memory location: Kernel: unaligned access to 0x55f4688c in wg_allowedips_insert_v6+0x2c/0x80 [wireguard] (iir 0xf3010df) Kernel: unaligned access to 0x55f46884 in wg_allowedips_insert_v6+0x38/0x80 [wireguard] (iir 0xf2010dc) Avoid such unaligned memory accesses by instead using the get_unaligned_be64() helper macro. [Jason: replace src[8] in original patch with src+8]
Severity
7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 16:13 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: e7096c131e5161fa3b8e52a650d7719d2857adfd , < ae630de24efb123d7199a43256396d7758f4cb75 (git)
Affected: e7096c131e5161fa3b8e52a650d7719d2857adfd , < b4764f0ad3d68de8a0b847c05f427afb86dd54e6 (git)
Affected: e7096c131e5161fa3b8e52a650d7719d2857adfd , < 217978a29c6ceca76d3c640bf94bdf50c268d801 (git)
Affected: e7096c131e5161fa3b8e52a650d7719d2857adfd , < 6638a203abad35fa636d59ac47bdbc4bc100fd74 (git)
Affected: e7096c131e5161fa3b8e52a650d7719d2857adfd , < 2fb34bf76431e831f9863cd59adc0bd1f67b0fbf (git)
Affected: e7096c131e5161fa3b8e52a650d7719d2857adfd , < 948f991c62a4018fb81d85804eeab3029c6209f8 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.6
Unaffected: 0 , < 5.6 (semver)
Unaffected: 5.10.222 , ≤ 5.10.* (semver)
Unaffected: 5.15.163 , ≤ 5.15.* (semver)
Unaffected: 6.1.100 , ≤ 6.1.* (semver)
Unaffected: 6.6.41 , ≤ 6.6.* (semver)
Unaffected: 6.9.10 , ≤ 6.9.* (semver)
Unaffected: 6.10 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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En la plataforma Parisc, el kernel emite advertencias del kernel porque swap_endian() intenta cargar una direcci\u00f3n IPv6 de 128 bits desde una memoria no alineada. ubicaci\u00f3n: Kernel: acceso no alineado a 0x55f4688c en wg_allowedips_insert_v6+0x2c/0x80 [wireguard] (iir 0xf3010df) Kernel: acceso no alineado a 0x55f46884 en wg_allowedips_insert_v6+0x38/0x80 [wireguard] (iir 0xf2010dc ) Evite dichos accesos a la memoria no alineados utilizando en su lugar get_unaligned_be64 () macro auxiliar. 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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-08-04T22:42:54+00:00",
      "cve": "CVE-2024-42247",
      "id": "CVE-2024-42247",
      "initial_release_date": "2024-08-07T00:00:00+00:00",
      "product_status:known_not_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wireguard: allowedips: avoid unaligned 64-bit memory accesses",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-42247.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"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\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"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\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:24.152Z\"}}], \"cna\": {\"title\": \"wireguard: allowedips: avoid unaligned 64-bit memory accesses\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.5, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H\"}, \"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\u0027s 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\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"e7096c131e5161fa3b8e52a650d7719d2857adfd\", \"lessThan\": \"ae630de24efb123d7199a43256396d7758f4cb75\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e7096c131e5161fa3b8e52a650d7719d2857adfd\", \"lessThan\": \"b4764f0ad3d68de8a0b847c05f427afb86dd54e6\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e7096c131e5161fa3b8e52a650d7719d2857adfd\", \"lessThan\": \"217978a29c6ceca76d3c640bf94bdf50c268d801\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e7096c131e5161fa3b8e52a650d7719d2857adfd\", \"lessThan\": \"6638a203abad35fa636d59ac47bdbc4bc100fd74\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e7096c131e5161fa3b8e52a650d7719d2857adfd\", \"lessThan\": \"2fb34bf76431e831f9863cd59adc0bd1f67b0fbf\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"e7096c131e5161fa3b8e52a650d7719d2857adfd\", \"lessThan\": \"948f991c62a4018fb81d85804eeab3029c6209f8\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/net/wireguard/allowedips.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.6\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.6\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.222\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.163\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.100\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.41\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9.10\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.9.*\"}, {\"status\": \"unaffected\", \"version\": \"6.10\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/wireguard/allowedips.c\"], \"defaultStatus\": \"affected\"}], \"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\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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]\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.222\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.163\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.100\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.41\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9.10\", \"versionStartIncluding\": \"5.6\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.10\", \"versionStartIncluding\": \"5.6\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T11:36:02.565Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-42247\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T11:36:02.565Z\", \"dateReserved\": \"2024-07-30T07:40:12.254Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-08-07T15:14:32.232Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.