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18 lines
1.9 KiB
Markdown
18 lines
1.9 KiB
Markdown
### [CVE-2024-56769](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-56769)
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### Description
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In the Linux kernel, the following vulnerability has been resolved:media: dvb-frontends: dib3000mb: fix uninit-value in dib3000_write_regSyzbot reports [1] an uninitialized value issue found by KMSAN indib3000_read_reg().Local u8 rb[2] is used in i2c_transfer() as a read buffer; in casethat call fails, the buffer may end up with some undefined values.Since no elaborate error handling is expected in dib3000_write_reg(),simply zero out rb buffer to mitigate the problem.[1] Syzkaller reportdvb-usb: bulk message failed: -22 (6/0)=====================================================BUG: KMSAN: uninit-value in dib3000mb_attach+0x2d8/0x3c0 drivers/media/dvb-frontends/dib3000mb.c:758 dib3000mb_attach+0x2d8/0x3c0 drivers/media/dvb-frontends/dib3000mb.c:758 dibusb_dib3000mb_frontend_attach+0x155/0x2f0 drivers/media/usb/dvb-usb/dibusb-mb.c:31 dvb_usb_adapter_frontend_init+0xed/0x9a0 drivers/media/usb/dvb-usb/dvb-usb-dvb.c:290 dvb_usb_adapter_init drivers/media/usb/dvb-usb/dvb-usb-init.c:90 [inline] dvb_usb_init drivers/media/usb/dvb-usb/dvb-usb-init.c:186 [inline] dvb_usb_device_init+0x25a8/0x3760 drivers/media/usb/dvb-usb/dvb-usb-init.c:310 dibusb_probe+0x46/0x250 drivers/media/usb/dvb-usb/dibusb-mb.c:110...Local variable rb created at: dib3000_read_reg+0x86/0x4e0 drivers/media/dvb-frontends/dib3000mb.c:54 dib3000mb_attach+0x123/0x3c0 drivers/media/dvb-frontends/dib3000mb.c:758...
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### POC
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#### Reference
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No PoCs from references.
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#### Github
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- https://github.com/oogasawa/Utility-security
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