CVE-2019-9213

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CVE-2019-9213

Summary:

Details: In the Linux kernel before 4.20.14, expand_downwards in mm/mmap.c lacks a check for the mmap minimum address, which makes it easier for attackers to exploit kernel NULL pointer dereferences on non-SMAP platforms. This is related to a capability check for the wrong task.

References: https://usn.ubuntu.com/3931-1/, http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00045.html, http://www.securityfocus.com/bid/107296, https://usn.ubuntu.com/3932-1/, https://usn.ubuntu.com/3933-1/, https://access.redhat.com/errata/RHSA-2019:0831, https://access.redhat.com/errata/RHSA-2019:1479, https://usn.ubuntu.com/3930-1/, https://usn.ubuntu.com/3930-2/, https://usn.ubuntu.com/3931-2/, https://usn.ubuntu.com/3932-2/, https://usn.ubuntu.com/3933-2/, https://access.redhat.com/errata/RHSA-2019:1480, https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html, http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00052.html, https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html, https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html, https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.105, https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.14, https://github.com/torvalds/linux/commit/0a1d52994d440e21def1c2174932410b4f2a98a1, https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.162, http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0a1d52994d440e21def1c2174932410b4f2a98a1, https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.27, https://www.exploit-db.com/exploits/46502/, http://packetstormsecurity.com/files/156053/Reliable-Datagram-Sockets-RDS-rds_atomic_free_op-Privilege-Escalation.html, https://bugs.chromium.org/p/project-zero/issues/detail?id=1792