netfilter: conntrack: revert ct extension genid infrastructure
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.2%
exploitation probability
0.2%top 90% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
netfilter: conntrack: revert ct extension genid infrastructure
This infrastructure is not used anymore after moving ct timeout and
helper to use datapath refcount to track object use.
Revert commit c56716c69ce1 ("netfilter: extensions: introduce extension
genid count") this patch disables all ct extensions (leading to NULL)
for unconfirmed conntracks, when this is only targeted at ct helper and
ct timeout. There is also codebase that dereferences the ct extension
without checking for NULL which could lead to crash.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/35e21a4dccc5c255ba59ccfbfeb4629ed21da972https://git.kernel.org/stable/c/61eab1d0237eb513fe73e391a5926ee70092c325https://git.kernel.org/stable/c/6bba4846f196d081bf553391d12b5a73dcc48685https://git.kernel.org/stable/c/a052a94bcc629acaecc2ce42a4af77f8fa399757https://git.kernel.org/stable/c/d53eecbca16f056abba274075cb15120ab062518