CVE-2022-50131: falha de alta gravidade em Linux
HID: mcp2221: prevent a buffer overflow in mcp_smbus_write()
Publicada em · Atualizada em
21Vexday Risk Score
Sem sinal de exploração. Nenhum artefato público de exploração conhecido até agora.
ssvc Trackcvss 7.8epss 0.2%
probabilidade de exploração
0.2%top 88% das CVEs
exploração observada
nãonenhuma fonte reporta
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().
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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Referências
https://git.kernel.org/stable/c/3c0f8a59f2cc8841ee6653399a77f4f3e6e9a270https://git.kernel.org/stable/c/62ac2473553a00229e67bdf3cb023b62cf7f5a9ahttps://git.kernel.org/stable/c/6402116a7b5ec80fa40fd145a80c813019cd555fhttps://git.kernel.org/stable/c/66c8e816f2f2ca4a61b406503bd10bad1b35f72fhttps://git.kernel.org/stable/c/91443c669d280937968f0aa4edefa741cfe35314