mxser: fix xmit_buf leak in activate when LSR == 0xff
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.3%
exploitation probability
0.3%top 82% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
mxser: fix xmit_buf leak in activate when LSR == 0xff
When LSR is 0xff in ->activate() (rather unlike), we return an error.
Provided ->shutdown() is not called when ->activate() fails, nothing
actually frees the buffer in this case.
Fix this by properly freeing the buffer in a designated label. We jump
there also from the "!info->type" if now too.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/125b7c929fc9b1e5eaa344bceb6367dfa6fd3f9dhttps://git.kernel.org/stable/c/2cd05c38a27bee7fb42aa4d43174d68ac55dac0fhttps://git.kernel.org/stable/c/376922045009f8ea2d20a8fa3475e95b47c41690https://git.kernel.org/stable/c/685b6d16bf89595310b5d61394c9b97cc9505c7chttps://git.kernel.org/stable/c/6c9041b2f90c0eace73106f22350e1d2c98f5edchttps://git.kernel.org/stable/c/6dffc2035fbaada60ca8db59e0962e34f760370ahttps://git.kernel.org/stable/c/996291d06851a26678a0fab488b6e1f0677c0576https://git.kernel.org/stable/c/b125b08dbee3611f03f53b71471813ed4ccafcddhttps://git.kernel.org/stable/c/cd3a4907ee334b40d7aa880c7ab310b154fd5cd4