Vulnerabilities > CVE-2023-6817 - Use After Free vulnerability in Linux Kernel
Attack vector
LOCAL Attack complexity
LOW Privileges required
LOW Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation. The function nft_pipapo_walk did not skip inactive elements during set walk which could lead double deactivations of PIPAPO (Pile Packet Policies) elements, leading to use-after-free. We recommend upgrading past commit 317eb9685095678f2c9f5a8189de698c5354316a.
Vulnerable Configurations
Common Weakness Enumeration (CWE)
References
- http://packetstormsecurity.com/files/177029/Kernel-Live-Patch-Security-Notice-LSN-0100-1.html
- http://packetstormsecurity.com/files/177029/Kernel-Live-Patch-Security-Notice-LSN-0100-1.html
- http://www.openwall.com/lists/oss-security/2023/12/22/13
- http://www.openwall.com/lists/oss-security/2023/12/22/13
- http://www.openwall.com/lists/oss-security/2023/12/22/6
- http://www.openwall.com/lists/oss-security/2023/12/22/6
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=317eb9685095678f2c9f5a8189de698c5354316a
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=317eb9685095678f2c9f5a8189de698c5354316a
- https://kernel.dance/317eb9685095678f2c9f5a8189de698c5354316a
- https://kernel.dance/317eb9685095678f2c9f5a8189de698c5354316a
- https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html
- https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html