fkie_cve-2022-50359
Vulnerability from fkie_nvd
Published
2025-09-17 15:15
Modified
2025-12-09 22:31
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: media: cx88: Fix a null-ptr-deref bug in buffer_prepare() When the driver calls cx88_risc_buffer() to prepare the buffer, the function call may fail, resulting in a empty buffer and null-ptr-deref later in buffer_queue(). The following log can reveal it: [ 41.822762] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI [ 41.824488] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 41.828027] RIP: 0010:buffer_queue+0xc2/0x500 [ 41.836311] Call Trace: [ 41.836945] __enqueue_in_driver+0x141/0x360 [ 41.837262] vb2_start_streaming+0x62/0x4a0 [ 41.838216] vb2_core_streamon+0x1da/0x2c0 [ 41.838516] __vb2_init_fileio+0x981/0xbc0 [ 41.839141] __vb2_perform_fileio+0xbf9/0x1120 [ 41.840072] vb2_fop_read+0x20e/0x400 [ 41.840346] v4l2_read+0x215/0x290 [ 41.840603] vfs_read+0x162/0x4c0 Fix this by checking the return value of cx88_risc_buffer() [hverkuil: fix coding style issues]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/10c99d1c46ea9cd940029e17bab11d021f315c21Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2b064d91440b33fba5b452f2d1b31f13ae911d71Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4befc7ffa18ef9a4b70d854465313a345a06862fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/644d5a87ab1863eb606526ea743021752a17e9cbPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6f21976095c1e92454ab030976f95f40d652351bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/704838040f3bdb4aa07ff4f26505a666a3defcfePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9181af2dbf06e7f432e5dbe88d10b22343e851b9Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c2257c8a501537afab276c306cb717b7260276e1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c76d04d2079a4b7369ce9a0e859c0f3f2250bcc1Patch
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *


To clipboard 

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  "cveTags": [],
  "descriptions": [
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      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: cx88: Fix a null-ptr-deref bug in buffer_prepare()\n\nWhen the driver calls cx88_risc_buffer() to prepare the buffer, the\nfunction call may fail, resulting in a empty buffer and null-ptr-deref\nlater in buffer_queue().\n\nThe following log can reveal it:\n\n[   41.822762] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN PTI\n[   41.824488] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\n[   41.828027] RIP: 0010:buffer_queue+0xc2/0x500\n[   41.836311] Call Trace:\n[   41.836945]  __enqueue_in_driver+0x141/0x360\n[   41.837262]  vb2_start_streaming+0x62/0x4a0\n[   41.838216]  vb2_core_streamon+0x1da/0x2c0\n[   41.838516]  __vb2_init_fileio+0x981/0xbc0\n[   41.839141]  __vb2_perform_fileio+0xbf9/0x1120\n[   41.840072]  vb2_fop_read+0x20e/0x400\n[   41.840346]  v4l2_read+0x215/0x290\n[   41.840603]  vfs_read+0x162/0x4c0\n\nFix this by checking the return value of cx88_risc_buffer()\n\n[hverkuil: fix coding style issues]"
    }
  ],
  "id": "CVE-2022-50359",
  "lastModified": "2025-12-09T22:31:39.153",
  "metrics": {
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        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 3.6,
        "source": "nvd@nist.gov",
        "type": "Primary"
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  "published": "2025-09-17T15:15:34.633",
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          "value": "CWE-476"
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      "source": "nvd@nist.gov",
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}


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