Headline
CVE-2023-6111
A use-after-free vulnerability in the Linux kernel’s netfilter: nf_tables component can be exploited to achieve local privilege escalation.
The function nft_trans_gc_catchall did not remove the catchall set element from the catchall_list when the argument sync is true, making it possible to free a catchall set element many times.
We recommend upgrading past commit 93995bf4af2c5a99e2a87f0cd5ce547d31eb7630.
Related news
Ubuntu Security Notice USN-6576-1
Ubuntu Security Notice 6576-1 - Lonial Con discovered that the netfilter subsystem in the Linux kernel did not properly handle an expired catchall element in some situations, leading to a use-after-free vulnerability. A local attacker could use this to cause a denial of service or possibly execute arbitrary code.