Distros-[dirtyvma] privilege escalation via non-rcu-protected vma traversal

Vulnerability Description

A vulnerability exists in the memory management subsystem of the Linux kernel. The lock handling for accessing and updating virtual memory areas (VMAs) is incorrect, leading to use-after-free problems. This issue can be successfully exploited to execute arbitrary kernel code, escalate containers, and gain root privileges.

References

• https://access.redhat.com/security/cve/CVE-2023-3269
• https://bugzilla.redhat.com/show_bug.cgi?id=2215268
• https://www.openwall.com/lists/oss-security/2023/07/05/1
• https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/U6AAA64CUPSMBW6XDTXPQJ3KQWYQ4K7L/
• http://seclists.org/fulldisclosure/2023/Jul/43
• http://www.openwall.com/lists/oss-security/2023/07/28/1
• http://www.openwall.com/lists/oss-security/2023/08/25/1
• http://www.openwall.com/lists/oss-security/2023/08/25/4
• https://security.netapp.com/advisory/ntap-20230908-0001/