Debian DSA-5402-1 Critical: Kernel Privilege Escalation and DoS

CVE-2023-0386

It was discovered that under certain conditions the overlayfs
filesystem implementation did not properly handle copy up
operations. A local user permitted to mount overlay mounts in user
namespaces can take advantage of this flaw for local privilege
escalation.

CVE-2023-31436

Gwangun Jung reported a a flaw causing heap out-of-bounds read/write
errors in the traffic control subsystem for the Quick Fair Queueing
scheduler (QFQ) which may result in information leak, denial of
service or privilege escalation.

CVE-2023-32233

Patryk Sondej and Piotr Krysiuk discovered a use-after-free flaw in
the Netfilter nf_tables implementation when processing batch
requests, which may result in local privilege escalation for a user
with the CAP_NET_ADMIN capability in any user or network namespace.

For the stable distribution (bullseye), these problems have been fixed in
version 5.10.179-1.

We recommend that you upgrade your linux packages.

For the detail...