Ubuntu 22.04: UBUNTU-2023-1a3eaf4c9a Critical: Security Patch Released

The kernel meta package

The 5.18.17 stable kernel update contains a number of important fixes across the

tree.

* Thu Aug 11 2022 Justin M. Forbes [5.18.17-0]

- netfilter: nf_tables: do not allow RULE_ID to refer to another chain (Thadeu Lima de Souza Cascardo)

- netfilter: nf_tables: do not allow CHAIN_ID to refer to another table (Thadeu Lima de Souza Cascardo)

- netfilter: nf_tables: do not allow SET_ID to refer to another table (Thadeu Lima de Souza Cascardo)

- net_sched: cls_route: remove from list when handle is 0 (Thadeu Lima de Souza Cascardo)

- posix-cpu-timers: Cleanup CPU timers before freeing them during exec (Thadeu Lima de Souza Cascardo)

- Linux v5.18.16 (Justin M. Forbes)

[ 1 ] Bug #2114849 - CVE-2022-2588 kernel: a use-after-free in cls_route filter implementation may lead to privilege escalation

https://bugzilla.redhat.com/show_bug.cgi?id=2114849

[ 2 ] Bug #2114874 - CVE-2022-2585 kernel: posix cpu timer use-after-free may lead to local privilege escalation

https://bugzilla.redhat.com/show_bug.cgi?id=2114874

[ 3 ] Bug #2114878 - CVE-2022-2586 kernel: nf_tables cross-table potential use-after-free may lead to local privilege escalation

https://bugzilla.redhat.com/show_bug.cgi?id=2114878

su -c 'dnf upgrade --advisory FEDORA-2022-9bbb1d9b7b' at the command

line. For more information, refer to the dnf documentation available at

https://dnf.readthedocs.io/en/latest/command_ref.html

All packages are signed with the Fedora Project GPG key. More details on the

GPG keys used by the Fedora Project can be found at

https://fedoraproject.org/security/

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