CVE-2024-56769

Jan. 9, 2025, 4:16 p.m.

5.5
Medium

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 ...

Product(s) Impacted

Vendor Product Versions
Linux
  • Linux Kernel
  • *, 6.13

Weaknesses

Common security weaknesses mapped to this vulnerability.

CWE-908
Use of Uninitialized Resource
The product uses or accesses a resource that has not been initialized.

*CPE(s)

Affected systems and software identified for this CVE.

Type Vendor Product Version Update Edition Language Software Edition Target Software Target Hardware Other Information
o linux linux_kernel / / / / / / / /
o linux linux_kernel / / / / / / / /
o linux linux_kernel / / / / / / / /
o linux linux_kernel 6.13 rc1 / / / / / /
o linux linux_kernel 6.13 rc2 / / / / / /
o linux linux_kernel 6.13 rc3 / / / / / /

References

https://git.kernel.org/stable/c/035772fcd631eee2756b31cb6df249c0a8d453d7
https://git.kernel.org/stable/c/1d6de21f00293d819b5ca6dbe75ff1f3b6392140
https://git.kernel.org/stable/c/2dd59fe0e19e1ab955259978082b62e5751924c7
https://git.kernel.org/stable/c/3876e3a1c31a58a352c6bf5d2a90e3304445a637
https://git.kernel.org/stable/c/53106510736e734ce8b731ba871363389bfbf4c9
https://git.kernel.org/stable/c/c1197c1457bb7098cf46366e898eb52b41b6876a
https://git.kernel.org/stable/c/e11778189513cd7fb2edced5bd053bc18ede8418

Tags

416baaa9-dc9f-4396-8d5f-8c081fb06d67
CWE-908
2025-01-06
CVE-2024-56769

CVSS Score

5.5 / 10

CVSS Data - 3.1

  • Attack Vector: LOCAL
  • Attack Complexity: LOW
  • Privileges Required: LOW
  • Scope: UNCHANGED
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: HIGH

    • CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

    View Vector String

Timeline

Published: Jan. 6, 2025, 5:15 p.m.
Last Modified: Jan. 9, 2025, 4:16 p.m.

Status : Modified

CVE has been amended by a source (CVE Primary CNA or another CNA). Analysis data supplied by the NVD may be no longer be accurate due to these changes.

More info

Source

416baaa9-dc9f-4396-8d5f-8c081fb06d67

*Disclaimer: Some vulnerabilities do not have an associated CPE. To enhance the data, we use AI to infer CPEs based on CVE details. This is an automated process and might not always be accurate.