ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table()
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.8epss 0.1%
exploitation probability
0.1%top 97% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
ipv4: free net->ipv4.sysctl_local_reserved_ports after unregister_net_sysctl_table()
ipv4_sysctl_exit_net() is currently freeing net->ipv4.sysctl_local_reserved_ports
too soon.
Only after unregister_net_sysctl_table() we can be sure no threads can possibly
use the sysctls, including /proc/sys/net/ipv4/ip_local_reserved_ports.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/155f90be5ee8be5b110ebc0b7da33c54c83b0208https://git.kernel.org/stable/c/5b23a2ff379e70b6b9ff744a972b63e1f8f4d996https://git.kernel.org/stable/c/6512c57c4638ddec113bf42439361ba85a12048dhttps://git.kernel.org/stable/c/87a1e0fe7776da7ab411be332b4be58ac8840d10https://git.kernel.org/stable/c/8e59d4d0dcde2dfb07a7ef855c849a2a0560aa57https://git.kernel.org/stable/c/a0ffc6081a8b27082dd5eae5aa1e3f59bbecf06chttps://git.kernel.org/stable/c/a7f4eefb6e1458431eef9fa20fb363320d185f76https://git.kernel.org/stable/c/ecf45080a4d3f4526cacb8b14060fe3b49a6913b