fbdev: sm501fb: Fix buffer errors in OF binding code
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 89% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
fbdev: sm501fb: Fix buffer errors in OF binding code
The code that gets the frame buffer mode from OF has 'use after free',
'buffer overrun' and memory leaks.
info->edid_data isn't free if the probe functions fail or if
pd->def_mode is set.
If both the CRT and PANEL are enabled info->edid_data is used after
being freed and is freed twice.
The string returned by of_get_property(np, "mode", &len) is just
written over either the static "640x480-16@60" or the module parameter
string without any regard for the length (which is most likely longer).
Use kstrump() for the OF mode and free everything before freeing 'info.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/0bc3d909a49e1fd8b8c3f2160d526e672c40621dhttps://git.kernel.org/stable/c/47008d59c60ed896085da95f8d4dd40e1677dd3ahttps://git.kernel.org/stable/c/48cf0f4c6581ec90104cec9c5bf794a8bf347e30https://git.kernel.org/stable/c/9057e3f5db39f0ef0dac2f59f2bc59bf17e36c31https://git.kernel.org/stable/c/b2ff450f7f5cfc7143cab57c3ad70293ba8b822ahttps://git.kernel.org/stable/c/d374f76e1257ecc5d691a765c512ed2c29a44741https://git.kernel.org/stable/c/d8421e09382cfe0bd2a044c8b0a822f64855dd4ehttps://git.kernel.org/stable/c/de590cdf7efec8a0b6da90ae2ab5fc5df26810b9