wifi: p54: prevent buffer-overflow in p54_rx_eeprom_readback()

{
  "id": "8891f372e2f68070174aa2fb53427efe8734c8df4fe428bf2d6ff7bc228c1f42",
  "url": "https://osv.dev/vulnerability/CVE-2025-38348",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "wifi: p54: prevent buffer-overflow in p54_rx_eeprom_readback()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: wifi: p54: prevent buffer-overflow in p54_rx_eeprom_readback() Robert Morris reported: |If a malicious USB device pretends to be an Intersil p54 wifi |interface and generates an eeprom_readback message with a large |eeprom->v1.len, p54_rx_eeprom_readback() will copy data from the |message beyond the end of priv->eeprom. | |static void p54_rx_eeprom_readback(struct p54_common *priv, | struct sk_buff *skb) |{ | struct p54_hdr *hdr = (struct p54_hdr *) skb->data; | struct p54_eeprom_lm86 *eeprom = (struct p54_eeprom_lm86 *) hdr->data; | | if (priv->fw_var >= 0x509) { | memcpy(priv->eeprom, eeprom->v2.data, | le16_to_cpu(eeprom->v2.len)); | } else { | memcpy(priv->eeprom, eeprom->v1.data, | le16_to_cpu(eeprom->v1.len)); | } | [...] The eeprom->v{1,2}.len is set by the driver in p54_download_eeprom(). The device is supposed to provide the same length back to the driver. But yes, it's possible (like shown in the report) to alter the value to something that causes a crash/panic due to overrun. This patch addresses the issue by adding the size to the common device context, so p54_rx_eeprom_readback no longer relies on possibly tampered values... That said, it also checks if the \"firmware\" altered the value and no longer copies them. The one, small saving grace is: Before the driver tries to read the eeprom, it needs to upload >a< firmware. the vendor firmware has a proprietary license and as a reason, it is not prese",
    "evidence": "osv:CVE-2025-38348",
    "products": [
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    "severity": "unknown",
    "structured": {
      "id": "CVE-2025-38348",
      "aliases": [
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      "modified": "2026-10-28T02:30:48.688652258Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0e4dc150423b829c35cbcf399481ca11594fc036",
        "https://git.kernel.org/stable/c/12134f79e53eb56b0b0b7447fa0c512acf6a8422",
        "https://git.kernel.org/stable/c/1f7f8168abe8cbe845ab8bb557228d44784a6b57",
        "https://git.kernel.org/stable/c/6d05390d20f110de37d051a3e063ef0a542d01fb",
        "https://git.kernel.org/stable/c/714afb4c38edd19a057d519c1f9c5d164b43de94",
        "https://git.kernel.org/stable/c/9701f842031b825e2fd5f22d064166f8f13f6e4d",
        "https://git.kernel.org/stable/c/da1b9a55ff116cb040528ef664c70a4eec03ae99",
        "https://git.kernel.org/stable/c/f39b2f8c1549a539846e083790fad396ef6cd802",
        "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html",
        "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/38xxx/CVE-2025-38348.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-38348",
        "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/2025/38xxx/CVE-2025-38348.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-38348",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 516785,
  "published_at": "2025-07-10T08:15:15.883+00:00"
}