A linux-5.10 security update has been released for Debian GNU/Linux 9 Extended LTS to address several vulnerabilities.

ELA-864-1 linux-5.10 security update

Package : linux-5.10
Version : 5.10.179-1~deb9u1 (stretch)

Related CVEs :
CVE-2023-0386
CVE-2023-31436
CVE-2023-32233

Several vulnerabilities have been discovered in the Linux kernel that
may lead to a privilege escalation, denial of service or information
leaks.

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.

ELA-864-1 linux-5.10 security update