Published: 05/07/2023 Updated: 01/02/2024

CVSS v3 Base Score: 7.8 | Impact Score: 5.9 | Exploitability Score: 1.8

VMScore: 0

This vulnerability allows local malicious users to escalate privileges on affected installations of Linux Kernel. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of nft_chains. The issue results from the lack of validating the status of a chain while processing lookup on the chain. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel.

Vulnerable Product	Search on Vulmon	Subscribe to Product
linux linux kernel
fedoraproject fedora 37
fedoraproject fedora 38
debian debian linux 11.0
canonical ubuntu linux 18.04
canonical ubuntu linux 14.04
canonical ubuntu linux 20.04
canonical ubuntu linux 16.04
canonical ubuntu linux 22.04

Synopsis Important: kernel security and bug fix update Type/Severity Security Advisory: Important Red Hat Insights patch analysis Identify and remediate systems affected by this advisory View affected systems Topic An update for kernel is now available for Red Hat Enterprise Linux 90 Extended Update SupportRed Hat Product Securit ...

Synopsis Important: kernel-rt security and bug fix update Type/Severity Security Advisory: Important Red Hat Insights patch analysis Identify and remediate systems affected by this advisory View affected systems Topic An update for kernel-rt is now available for Red Hat Enterprise Linux 90 Extended Update SupportRed Hat Product S ...

Synopsis Important: kpatch-patch security update Type/Severity Security Advisory: Important Red Hat Insights patch analysis Identify and remediate systems affected by this advisory View affected systems Topic An update for kpatch-patch is now available for Red Hat Enterprise Linux 90 Extended Update SupportRed Hat Product Securit ...

Several vulnerabilities have been discovered in the Linux kernel that may lead to a privilege escalation, denial of service or information leaks CVE-2023-2156 It was discovered that a flaw in the handling of the RPL protocol may allow an unauthenticated remote attacker to cause a denial of service if RPL is enabled (not by default in ...

A use-after-free flaw was found in the Netfilter subsystem of the Linux kernel when processing named and anonymous sets in batch requests, which can lead to performing arbitrary reads and writes in kernel memory This flaw allows a local user with CAP_NET_ADMIN capability to crash or potentially escalate their privileges on the system (CVE-2023-31 ...

DescriptionThe MITRE CVE dictionary describes this issue as: Linux Kernel nftables Use-After-Free Local Privilege Escalation Vulnerability; `nft_chain_lookup_byid()` failed to check whether a chain was active and CAP_NET_ADMIN is in any user or network namespace ...

CWE-416 https://lore.kernel.org/netfilter-devel/20230705121627.GC19489@breakpoint.cc/T/https://www.openwall.com/lists/oss-security/2023/07/05/2 http://www.openwall.com/lists/oss-security/2023/07/05/2 https://www.debian.org/security/2023/dsa-5453 https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/UPHI46ROSSLVAV4R5LJWJYU747JGOS6D/https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RGZC5XOANA75OJ4XARBBXYSLDKUIJI5E/http://packetstormsecurity.com/files/173757/Kernel-Live-Patch-Security-Notice-LSN-0096-1.html https://lists.debian.org/debian-lts-announce/2023/08/msg00001.html http://packetstormsecurity.com/files/174577/Kernel-Live-Patch-Security-Notice-LSN-0097-1.html https://security.netapp.com/advisory/ntap-20240201-0001/https://access.redhat.com/errata/RHSA-2023:5604 https://www.debian.org/security/2023/dsa-5453 https://nvd.nist.gov https://www.zerodayinitiative.com/advisories/ZDI-23-899/

CVE-2023-31248

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