CVE-2024-56769

Description

In the Linux kernel, the following vulnerability has been resolved: media: dvb-frontends: dib3000mb: fix uninit-value in dib3000_write_reg Syzbot reports [1] an uninitialized value issue found by KMSAN in dib3000_read_reg(). Local u8 rb[2] is used in i2c_transfer() as a read buffer; in case that 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 report dvb-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 ...

Reserved 2024-12-29 | Published 2025-01-06 | Updated 2025-01-09 | Assigner Linux

Product status

Default status
unaffected

74340b0a8bc60b400c7e5fe4950303aa6f914d16 before 035772fcd631eee2756b31cb6df249c0a8d453d7
affected

74340b0a8bc60b400c7e5fe4950303aa6f914d16 before e11778189513cd7fb2edced5bd053bc18ede8418
affected

74340b0a8bc60b400c7e5fe4950303aa6f914d16 before 53106510736e734ce8b731ba871363389bfbf4c9
affected

74340b0a8bc60b400c7e5fe4950303aa6f914d16 before 3876e3a1c31a58a352c6bf5d2a90e3304445a637
affected

74340b0a8bc60b400c7e5fe4950303aa6f914d16 before 1d6de21f00293d819b5ca6dbe75ff1f3b6392140
affected

74340b0a8bc60b400c7e5fe4950303aa6f914d16 before c1197c1457bb7098cf46366e898eb52b41b6876a
affected

74340b0a8bc60b400c7e5fe4950303aa6f914d16 before 2dd59fe0e19e1ab955259978082b62e5751924c7
affected

Default status
affected

2.6.19
affected

Any version before 2.6.19
unaffected

5.4.289
unaffected

5.10.233
unaffected

5.15.176
unaffected

6.1.123
unaffected

6.6.69
unaffected

6.12.8
unaffected

6.13-rc4
unaffected

References

git.kernel.org/...c/035772fcd631eee2756b31cb6df249c0a8d453d7

git.kernel.org/...c/e11778189513cd7fb2edced5bd053bc18ede8418

git.kernel.org/...c/53106510736e734ce8b731ba871363389bfbf4c9

git.kernel.org/...c/3876e3a1c31a58a352c6bf5d2a90e3304445a637

git.kernel.org/...c/1d6de21f00293d819b5ca6dbe75ff1f3b6392140

git.kernel.org/...c/c1197c1457bb7098cf46366e898eb52b41b6876a

git.kernel.org/...c/2dd59fe0e19e1ab955259978082b62e5751924c7

cve.org (CVE-2024-56769)

nvd.nist.gov (CVE-2024-56769)

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