7.8

CVE-2022-50131

HID: mcp2221: prevent a buffer overflow in mcp_smbus_write()

In the Linux kernel, the following vulnerability has been resolved:

HID: mcp2221: prevent a buffer overflow in mcp_smbus_write()

Smatch Warning:
drivers/hid/hid-mcp2221.c:388 mcp_smbus_write() error: __memcpy()
'&mcp->txbuf[5]' too small (59 vs 255)
drivers/hid/hid-mcp2221.c:388 mcp_smbus_write() error: __memcpy() 'buf'
too small (34 vs 255)

The 'len' variable can take a value between 0-255 as it can come from
data->block[0] and it is user data. So add an bound check to prevent a
buffer overflow in memcpy().
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.7 < 5.10.137
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.61
Linux ≫ Linux Kernel Version >= 5.16 < 5.18.18
Linux ≫ Linux Kernel Version >= 5.19 < 5.19.2
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.19% 0.084
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

https://git.kernel.org/stable/c/66c8e816f2f2ca4a61b406503bd10bad1b35f72f
Patch
https://git.kernel.org/stable/c/91443c669d280937968f0aa4edefa741cfe35314
Patch
https://git.kernel.org/stable/c/6402116a7b5ec80fa40fd145a80c813019cd555f
Patch
https://git.kernel.org/stable/c/3c0f8a59f2cc8841ee6653399a77f4f3e6e9a270
Patch
https://git.kernel.org/stable/c/62ac2473553a00229e67bdf3cb023b62cf7f5a9a
Patch