CVE-2024-56769

MEDIUM EPSS 11.5%
Published Jan 6, 20251y ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jan 6, 2025 1y ago
Last Modified Jun 17, 2026 2w ago

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 ...

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
11.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-908

Affected Products 6

VendorProductVersionRange
linuxlinux_kernel*≥2.6.19  –  <6.1.123
linuxlinux_kernel*≥6.2  –  <6.6.69
linuxlinux_kernel*≥6.7  –  <6.12.8
linuxlinux_kernel6.13any
linuxlinux_kernel6.13any
linuxlinux_kernel6.13any

References 9

  • git.kernel.org https://git.kernel.org/stable/c/035772fcd631eee2756b31cb6df249c0a8d453d7
  • git.kernel.org https://git.kernel.org/stable/c/1d6de21f00293d819b5ca6dbe75ff1f3b6392140
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2dd59fe0e19e1ab955259978082b62e5751924c7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3876e3a1c31a58a352c6bf5d2a90e3304445a637
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/53106510736e734ce8b731ba871363389bfbf4c9
  • git.kernel.org https://git.kernel.org/stable/c/c1197c1457bb7098cf46366e898eb52b41b6876a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e11778189513cd7fb2edced5bd053bc18ede8418
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/1d6de21f00293d819b5ca6dbe75ff1f3b6392140
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2dd59fe0e19e1ab955259978082b62e5751924c7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3876e3a1c31a58a352c6bf5d2a90e3304445a637
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/c1197c1457bb7098cf46366e898eb52b41b6876a
    Patch