-------------------------------------------------------------------------------- Fedora Update Notification FEDORA-2021-05152dbcf5 2021-05-16 02:06:09.511519 --------------------------------------------------------------------------------
Name : kernel Product : Fedora 33 Version : 5.11.20 Release : 200.fc33 URL : https://www.kernel.org/ Summary : The Linux kernel Description : The kernel meta package
-------------------------------------------------------------------------------- Update Information:
The 5.11.20 stable kernel update contains a number of important fixes across the tree. -------------------------------------------------------------------------------- ChangeLog:
* Wed May 12 2021 Justin M. Forbes jforbes@fedoraproject.org [5.11.20-0] - io_uring: truncate lengths larger than MAX_RW_COUNT on provide buffers (Thadeu Lima de Souza Cascardo) - bpf: Prevent writable memory-mapping of read-only ringbuf pages (Andrii Nakryiko) - bpf, ringbuf: Deny reserve of buffers larger than ringbuf (Thadeu Lima de Souza Cascardo) - bpf: Fix alu32 const subreg bound tracking on bitwise operations (Daniel Borkmann) - net/nfc: fix use-after-free llcp_sock_bind/connect (Or Cohen) -------------------------------------------------------------------------------- References:
[ 1 ] Bug #1959514 - CVE-2021-23134 kernel: use-after-free in nfc sockets https://bugzilla.redhat.com/show_bug.cgi?id=1959514 [ 2 ] Bug #1959556 - CVE-2021-3490 kernel: Linux kernel eBPF bitwise ops ALU32 bounds tracking https://bugzilla.redhat.com/show_bug.cgi?id=1959556 [ 3 ] Bug #1959559 - CVE-2021-3489 kernel: Linux kernel eBPF RINGBUF map oversized allocation https://bugzilla.redhat.com/show_bug.cgi?id=1959559 [ 4 ] Bug #1959565 - CVE-2021-3491 kernel: Linux kernel io_uring PROVIDE_BUFFERS MAX_RW_COUNT bypass https://bugzilla.redhat.com/show_bug.cgi?id=1959565 --------------------------------------------------------------------------------
This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2021-05152dbcf5' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label
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/keys --------------------------------------------------------------------------------