ELA-864-1 linux-5.10 security update

linux kernel update

2023-06-07
Packagelinux-5.10
Version5.10.179-1~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.


For Debian 9 stretch, these problems have been fixed in version 5.10.179-1~deb9u1.

We recommend that you upgrade your linux-5.10 packages.

Further information about Extended LTS security advisories can be found in the dedicated section of our website.