Provide references for CVE-2021-3491.
Where can I find more information about CVE-2021-3491?
References are available at: https://ubuntu.com/security/notices/USN-4950-1, https://ubuntu.com/security/notices/USN-4949-1, https://www.openwall.com/lists/oss-security/2021/05/11/13, https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d1f82808877bb10d3deee7cf3374a4eb3fb582db, https://www.zerodayinitiative.com/advisories/ZDI-21-589/, https://security.netapp.com/advisory/ntap-20210716-0004/.