CVE-2023-5178

Published: 1 November 2023

A use-after-free vulnerability was found in drivers/nvme/target/tcp.c` in `nvmet_tcp_free_crypto` due to a logical bug in the NVMe-oF/TCP subsystem in the Linux kernel. This issue may allow a malicious user to cause a use-after-free and double-free problem, which may permit remote code execution or lead to local privilege escalation in case that the attacker already has local privileges.

From the Ubuntu Security Team

Alon Zahavi discovered that the NVMe-oF/TCP subsystem in the Linux kernel did not properly handle queue initialization failures in certain situations, leading to a use-after-free vulnerability. A remote attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code.

Status

Severity score breakdown

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-5178
• https://git.kernel.org/linus/d920abd1e7c4884f9ecd0749d1921b7ab19ddfbd
• https://www.openwall.com/lists/oss-security/2023/10/15/1
• https://lore.kernel.org/linux-nvme/20231002105428.226515-1-sagi@grimberg.me/
• https://ubuntu.com/security/notices/USN-6497-1
• https://ubuntu.com/security/notices/USN-6534-1
• https://ubuntu.com/security/notices/USN-6536-1
• https://ubuntu.com/security/notices/USN-6537-1
• NVD
• Launchpad
• Debian

Bugs

• https://bugzilla.redhat.com/show_bug.cgi?id=2241924
• https://bugzilla.suse.com/show_bug.cgi?id=1215768