Vulnerabilities > CVE-2021-47273 - NULL Pointer Dereference vulnerability in Linux Kernel
Attack vector
LOCAL Attack complexity
LOW Privileges required
LOW Confidentiality impact
NONE Integrity impact
NONE Availability impact
HIGH Summary
In the Linux kernel, the following vulnerability has been resolved: usb: dwc3-meson-g12a: fix usb2 PHY glue init when phy0 is disabled When only PHY1 is used (for example on Odroid-HC4), the regmap init code uses the usb2 ports when doesn't initialize the PHY1 regmap entry. This fixes: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000020 ... pc : regmap_update_bits_base+0x40/0xa0 lr : dwc3_meson_g12a_usb2_init_phy+0x4c/0xf8 ... Call trace: regmap_update_bits_base+0x40/0xa0 dwc3_meson_g12a_usb2_init_phy+0x4c/0xf8 dwc3_meson_g12a_usb2_init+0x7c/0xc8 dwc3_meson_g12a_usb_init+0x28/0x48 dwc3_meson_g12a_probe+0x298/0x540 platform_probe+0x70/0xe0 really_probe+0xf0/0x4d8 driver_probe_device+0xfc/0x168 ...
Vulnerable Configurations
Common Weakness Enumeration (CWE)
References
- https://git.kernel.org/stable/c/4d2aa178d2ad2fb156711113790dde13e9aa2376
- https://git.kernel.org/stable/c/4d2aa178d2ad2fb156711113790dde13e9aa2376
- https://git.kernel.org/stable/c/750a0d75564293be3ed50f13ef7f38ab75106421
- https://git.kernel.org/stable/c/750a0d75564293be3ed50f13ef7f38ab75106421
- https://git.kernel.org/stable/c/d8dd3754e707104a34f8ec595034d503ea8871a2
- https://git.kernel.org/stable/c/d8dd3754e707104a34f8ec595034d503ea8871a2