Debian Security Advisory
DSA-5402-1 linux -- security update
- Date Reported:
- 13 May 2023
- Affected Packages:
- Security database references:
- In Mitre's CVE dictionary: CVE-2023-0386, CVE-2023-31436, CVE-2023-32233.
- More information:
Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks.
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.
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.
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 detailed security status of linux please refer to its security tracker page at: https://security-tracker.debian.org/tracker/linux