fkie_cve-2023-53244
Vulnerability from fkie_nvd
Published
2025-09-15 15:15
Modified
2025-09-15 15:22
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: media: pci: tw68: Fix null-ptr-deref bug in buf prepare and finish When the driver calls tw68_risc_buffer() to prepare the buffer, the function call dma_alloc_coherent may fail, resulting in a empty buffer buf->cpu. Later when we free the buffer or access the buffer, null ptr deref is triggered. This bug is similar to the following one: https://git.linuxtv.org/media_stage.git/commit/?id=2b064d91440b33fba5b452f2d1b31f13ae911d71. We believe the bug can be also dynamically triggered from user side. Similarly, we fix this by checking the return value of tw68_risc_buffer() and the value of buf->cpu before buffer free.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1634b7adcc5bef645b3666fdd564e5952a9e24e0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3715c5e9a8f96b6ed0dcbea06da443efccac1ecc
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3c67f49a6643d973e83968ea35806c7b5ae68b56
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dcf632bca424e6ff8c8eb89c96694e7f05cd29b6
Impacted products
Vendor Product Version


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{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: pci: tw68: Fix null-ptr-deref bug in buf prepare and finish\n\nWhen the driver calls tw68_risc_buffer() to prepare the buffer, the\nfunction call dma_alloc_coherent may fail, resulting in a empty buffer\nbuf-\u003ecpu. Later when we free the buffer or access the buffer, null ptr\nderef is triggered.\n\nThis bug is similar to the following one:\nhttps://git.linuxtv.org/media_stage.git/commit/?id=2b064d91440b33fba5b452f2d1b31f13ae911d71.\n\nWe believe the bug can be also dynamically triggered from user side.\nSimilarly, we fix this by checking the return value of tw68_risc_buffer()\nand the value of buf-\u003ecpu before buffer free."
    }
  ],
  "id": "CVE-2023-53244",
  "lastModified": "2025-09-15T15:22:27.090",
  "metrics": {},
  "published": "2025-09-15T15:15:51.570",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1634b7adcc5bef645b3666fdd564e5952a9e24e0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3715c5e9a8f96b6ed0dcbea06da443efccac1ecc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3c67f49a6643d973e83968ea35806c7b5ae68b56"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/dcf632bca424e6ff8c8eb89c96694e7f05cd29b6"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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