{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-56769",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-56769"
  ],
  "published": "2025-01-06T16:21:18Z",
  "summary": "media: dvb-frontends: dib3000mb: fix uninit-value in dib3000_write_reg",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: dvb-frontends: dib3000mb: fix uninit-value in dib3000_write_reg\n\nSyzbot reports [1] an uninitialized value issue found by KMSAN in\ndib3000_read_reg().\n\nLocal u8 rb[2] is used in i2c_transfer() as a read buffer; in case\nthat call fails, the buffer may end up with some undefined values.\n\nSince no elaborate error handling is expected in dib3000_write_reg(),\nsimply zero out rb buffer to mitigate the problem.\n\n[1] Syzkaller report\ndvb-usb: bulk message failed: -22 (6/0)\n=====================================================\nBUG: KMSAN: uninit-value in dib3000mb_attach+0x2d8/0x3c0 drivers/media/dvb-frontends/dib3000mb.c:758\n dib3000mb_attach+0x2d8/0x3c0 drivers/media/dvb-frontends/dib3000mb.c:758\n dibusb_dib3000mb_frontend_attach+0x155/0x2f0 drivers/media/usb/dvb-usb/dibusb-mb.c:31\n dvb_usb_adapter_frontend_init+0xed/0x9a0 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:290\n dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:90 [inline]\n dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:186 [inline]\n dvb_usb_device_init+0x25a8/0x3760 drivers/media/usb/dvb-usb/dvb-usb-init.c:310\n dibusb_probe+0x46/0x250 drivers/media/usb/dvb-usb/dibusb-mb.c:110\n...\nLocal variable rb created at:\n dib3000_read_reg+0x86/0x4e0 drivers/media/dvb-frontends/dib3000mb.c:54\n dib3000mb_attach+0x123/0x3c0 drivers/media/dvb-frontends/dib3000mb.c:758\n...",
  "affected": [
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  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-56769"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/035772fcd631eee2756b31cb6df249c0a8d453d7"
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      "url": "https://git.kernel.org/stable/c/e11778189513cd7fb2edced5bd053bc18ede8418"
    },
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      "url": "https://git.kernel.org/stable/c/53106510736e734ce8b731ba871363389bfbf4c9"
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    },
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      "url": "https://git.kernel.org/stable/c/1d6de21f00293d819b5ca6dbe75ff1f3b6392140"
    },
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    },
    {
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      "url": "https://git.kernel.org/stable/c/2dd59fe0e19e1ab955259978082b62e5751924c7"
    }
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  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-12T04:54:46Z"
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}