Kernel stack disclosure in 32-bit compatibility support
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.5epss 0.1%
exploitation probability
0.1%top 98% of all CVEs
observed exploitation
nono source reports it
The compat32 kevent() handler translates a 64-bit kevent struct into a stack- declared 32-bit struct. It did not first zero the stack struct.
An unprivileged user may observe a small amount of uninitialized kernel stack data, which may contain sensitive information.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Affected products
FreeBSD · FreeBSD