bnxt_en: Set DMA unmap len correctly for XDP_REDIRECT

{
  "id": "37a75fa0746d326603e3384289b2751b48e9c998f0c97ddfa543fb7fa6bf9205",
  "url": "https://osv.dev/vulnerability/CVE-2025-38439",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "bnxt_en: Set DMA unmap len correctly for XDP_REDIRECT",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: bnxt_en: Set DMA unmap len correctly for XDP_REDIRECT When transmitting an XDP_REDIRECT packet, call dma_unmap_len_set() with the proper length instead of 0. This bug triggers this warning on a system with IOMMU enabled: WARNING: CPU: 36 PID: 0 at drivers/iommu/dma-iommu.c:842 __iommu_dma_unmap+0x159/0x170 RIP: 0010:__iommu_dma_unmap+0x159/0x170 Code: a8 00 00 00 00 48 c7 45 b0 00 00 00 00 48 c7 45 c8 00 00 00 00 48 c7 45 a0 ff ff ff ff 4c 89 45 b8 4c 89 45 c0 e9 77 ff ff ff <0f> 0b e9 60 ff ff ff e8 8b bf 6a 00 66 66 2e 0f 1f 84 00 00 00 00 RSP: 0018:ff22d31181150c88 EFLAGS: 00010206 RAX: 0000000000002000 RBX: 00000000e13a0000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ff22d31181150cf0 R08: ff22d31181150ca8 R09: 0000000000000000 R10: 0000000000000000 R11: ff22d311d36c9d80 R12: 0000000000001000 R13: ff13544d10645010 R14: ff22d31181150c90 R15: ff13544d0b2bac00 FS: 0000000000000000(0000) GS:ff13550908a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005be909dacff8 CR3: 0008000173408003 CR4: 0000000000f71ef0 PKRU: 55555554 Call Trace: ? show_regs+0x6d/0x80 ? __warn+0x89/0x160 ? __iommu_dma_unmap+0x159/0x170 ? report_bug+0x17e/0x1b0 ? handle_bug+0x46/0x90 ? exc_invalid_op+0x18/0x80 ? asm_exc_invalid_op+0x1b/0x20 ? __iommu_dma_unmap+0x159/0x170 ? __iommu_dma_unmap+0xb3/0x170 iommu_dma_unmap_page+0x4f/0x100 dma_unmap_page_at",
    "evidence": "osv:CVE-2025-38439",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "5.4.296",
            "evidence": "/affected/1/ranges"
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            "evidence": "/affected/1/ranges"
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            "value": "6.1.146",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.99",
            "evidence": "/affected/1/ranges"
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          {
            "value": "6.12.39",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.15.7",
            "evidence": "/affected/1/ranges"
          }
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        "affected_versions": []
      }
    ],
    "severity": "critical",
    "structured": {
      "id": "CVE-2025-38439",
      "aliases": [
        "CVE-2025-38439"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
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                {
                  "fixed": "8d672a1a6bfc81fef9151925c9c0481f4acf4bec"
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                {
                  "fixed": "f9eaf6d036075dc820520e1194692c0619b7297b"
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      "modified": "2026-10-28T02:30:38.300443260Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/16ae306602163fcb7ae83f2701b542e43c100cee",
        "https://git.kernel.org/stable/c/3cdf199d4755d477972ee87110b2aebc88b3cfad",
        "https://git.kernel.org/stable/c/50dad9909715094e7d9ca25e9e0412b875987519",
        "https://git.kernel.org/stable/c/5909679a82cd74cf0343d9e3ddf4b6931aa7e613",
        "https://git.kernel.org/stable/c/8d672a1a6bfc81fef9151925c9c0481f4acf4bec",
        "https://git.kernel.org/stable/c/e260f4d49370c85a4701d43c6d16b8c39f8b605f",
        "https://git.kernel.org/stable/c/f154e41e1d9d15ab21300ba7bbf0ebb5cb3b9c2a",
        "https://git.kernel.org/stable/c/f9eaf6d036075dc820520e1194692c0619b7297b",
        "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-2025-38439.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-38439",
        "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-2025-38439.json"
      }
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    "related_cves": [
      {
        "value": "CVE-2025-38439",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 505506,
  "published_at": "2025-07-25T15:27:18.64+00:00"
}