Bluetooth: btnxpuart: Fix Null pointer dereference in btnxpuart_flush()

{
  "id": "769411f324a296d8437527a3e222caa792595c08c6acbb4b2791c95ad80ff0f9",
  "url": "https://osv.dev/vulnerability/CVE-2024-46749",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Bluetooth: btnxpuart: Fix Null pointer dereference in btnxpuart_flush()",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: Bluetooth: btnxpuart: Fix Null pointer dereference in btnxpuart_flush() This adds a check before freeing the rx->skb in flush and close functions to handle the kernel crash seen while removing driver after FW download fails or before FW download completes. dmesg log: [ 54.634586] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000080 [ 54.643398] Mem abort info: [ 54.646204] ESR = 0x0000000096000004 [ 54.649964] EC = 0x25: DABT (current EL), IL = 32 bits [ 54.655286] SET = 0, FnV = 0 [ 54.658348] EA = 0, S1PTW = 0 [ 54.661498] FSC = 0x04: level 0 translation fault [ 54.666391] Data abort info: [ 54.669273] ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000 [ 54.674768] CM = 0, WnR = 0, TnD = 0, TagAccess = 0 [ 54.674771] GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [ 54.674775] user pgtable: 4k pages, 48-bit VAs, pgdp=0000000048860000 [ 54.674780] [0000000000000080] pgd=0000000000000000, p4d=0000000000000000 [ 54.703880] Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP [ 54.710152] Modules linked in: btnxpuart(-) overlay fsl_jr_uio caam_jr caamkeyblob_desc caamhash_desc caamalg_desc crypto_engine authenc libdes crct10dif_ce polyval_ce polyval_generic snd_soc_imx_spdif snd_soc_imx_card snd_soc_ak5558 snd_soc_ak4458 caam secvio error snd_soc_fsl_micfil snd_soc_fsl_spdif snd_soc_fsl_sai snd_soc_fsl_utils imx_pcm_dma gpio_ir_recv rc_core sch_fq_codel fuse [ 54.744357] CPU: 3 PID: 72 C",
    "evidence": "osv:CVE-2024-46749",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.6.51",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.10.10",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2024-46749",
      "aliases": [
        "CVE-2024-46749"
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "ab3a769b4dccec2cf60f0a0700b140991bf9afc8"
                },
                {
                  "fixed": "013dae4735d2010544d1f2121bdeb8e6c9ea171e"
                },
                {
                  "fixed": "056e0cd381d59a9124b7c43dd715e15f56a11635"
                },
                {
                  "fixed": "c68bbf5e334b35b36ac5b9f0419f1f93f796bad1"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-46749.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.4.0"
                },
                {
                  "fixed": "6.6.51"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.10.10"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-46749.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:32.313791808Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/013dae4735d2010544d1f2121bdeb8e6c9ea171e",
        "https://git.kernel.org/stable/c/056e0cd381d59a9124b7c43dd715e15f56a11635",
        "https://git.kernel.org/stable/c/c68bbf5e334b35b36ac5b9f0419f1f93f796bad1",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/46xxx/CVE-2024-46749.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2024-46749",
        "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/2024/46xxx/CVE-2024-46749.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2024-46749",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 499307,
  "published_at": "2024-09-18T07:12:09.594+00:00"
}