UnratedFix available

wifi: mwifiex: Fix memcpy() field-spanning write warning in mwifiex_config_scan()

Type: advisorySources: OSV

In the Linux kernel, the following vulnerability has been resolved: wifi: mwifiex: Fix memcpy() field-spanning write warning in mwifiex_config_scan() Replace one-element array with a flexible-array member in `struct mwifiex_ie_types_wildcard_ssid_params` to fix the following warning on a MT8173 Chromebook (mt8173-elm-hana): [ 356.775250] ------------[ cut here ]------------ [ 356.784543] memcpy: detected field-spanning write (size 6) of single field "wildcard_ssid_tlv->ssid" at drivers/net/wireless/marvell/mwifiex/scan.c:904 (size 1) [ 356.813403] WARNING: CPU: 3 PID: 742 at drivers/net/wireless/marvell/mwifiex/scan.c:904 mwifiex_scan_networks+0x4fc/0xf28 [mwifiex] The "(size 6)" above is exactly the length of the SSID of the network this device was connected to. The source of the warning looks like: ssid_len = user_scan_in->ssid_list[i].ssid_len; [...] memcpy(wildcard_ssid_tlv->ssid, user_scan_in->ssid_list[i].ssid, ssid_len); There is a #define WILDCARD_SSID_TLV_MAX_SIZE that uses sizeof() on this struct, but it already didn't account for the size of the one-element array, so it doesn't need to be changed.

Products: Kernel
Affected versions: Not specified
Fixed versions: 4.19.325, 5.10.231, 5.15.174, 5.4.287, 6.1.120, 6.11.11, 6.12.2, 6.6.64
CVEs: CVE-2024-56539
Confirmed fixed CVEs: Not specified
Updated in this feed: 7 Nov 2026, 03:31 UTC · Revision 1

Source evidence

wifi: mwifiex: Fix memcpy() field-spanning write warning in mwifiex_config_scan()

core-osv · Original source

Published 27 Dec 2024, 14:11 UTC

osv:CVE-2024-56539

Kernel

Fixed versions: 4.19.325, 5.4.287, 5.10.231, 5.15.174, 6.1.120, 6.6.64, 6.11.11, 6.12.2

Complete source record

{
  "id": "630bbed3ccec8724757499a77427d8d89ecd5514d4afb33702ec9f311ccda145",
  "url": "https://osv.dev/vulnerability/CVE-2024-56539",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "wifi: mwifiex: Fix memcpy() field-spanning write warning in mwifiex_config_scan()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: wifi: mwifiex: Fix memcpy() field-spanning write warning in mwifiex_config_scan() Replace one-element array with a flexible-array member in `struct mwifiex_ie_types_wildcard_ssid_params` to fix the following warning on a MT8173 Chromebook (mt8173-elm-hana): [ 356.775250] ------------[ cut here ]------------ [ 356.784543] memcpy: detected field-spanning write (size 6) of single field \"wildcard_ssid_tlv->ssid\" at drivers/net/wireless/marvell/mwifiex/scan.c:904 (size 1) [ 356.813403] WARNING: CPU: 3 PID: 742 at drivers/net/wireless/marvell/mwifiex/scan.c:904 mwifiex_scan_networks+0x4fc/0xf28 [mwifiex] The \"(size 6)\" above is exactly the length of the SSID of the network this device was connected to. The source of the warning looks like: ssid_len = user_scan_in->ssid_list[i].ssid_len; [...] memcpy(wildcard_ssid_tlv->ssid, user_scan_in->ssid_list[i].ssid, ssid_len); There is a #define WILDCARD_SSID_TLV_MAX_SIZE that uses sizeof() on this struct, but it already didn't account for the size of the one-element array, so it doesn't need to be changed.",
    "evidence": "osv:CVE-2024-56539",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "evidence": "/affected/1/ranges"
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            "evidence": "/affected/1/ranges"
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            "evidence": "/affected/1/ranges"
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            "evidence": "/affected/1/ranges"
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          {
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        "affected_versions": []
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    "severity": "unknown",
    "structured": {
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      "aliases": [
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      "affected": [
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      "modified": "2026-10-28T02:30:49.593545302Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1de0ca1d7320a645ba2ee5954f64be08935b002a",
        "https://git.kernel.org/stable/c/581261b2d6fdb4237b24fa13f5a5f87bf2861f2c",
        "https://git.kernel.org/stable/c/5fa329c44e1e635da2541eab28b6cdb8464fc8d1",
        "https://git.kernel.org/stable/c/a09760c513ae0f98c7082a1deace7fb6284ee866",
        "https://git.kernel.org/stable/c/b466746cfb6be43f9a1457bbee52ade397fb23ea",
        "https://git.kernel.org/stable/c/c4698ef8c42e02782604bf4f8a489dbf6b0c1365",
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        "https://git.kernel.org/stable/c/d7774910c5583e61c5fe2571280366624ef48036",
        "https://git.kernel.org/stable/c/e2de22e4b6213371d9e76f74a10ce817572a8d74",
        "https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html",
        "https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/56xxx/CVE-2024-56539.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-56539",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/56xxx/CVE-2024-56539.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-56539",
        "evidence": "/id"
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    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 517770,
  "published_at": "2024-12-27T14:11:21.487+00:00"
}