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Status published
Medium
CVE-2019-9213
In the Linux kernel before 4.20.14, expand_downwards in mm/mmap.c lacks...
Vulnerability Description
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.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://www.exploit-db.com/exploits/46502/
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0a1d52994d440e21def1c2174932410b4f2a98a1
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.162
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.27
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.105
- https://github.com/torvalds/linux/commit/0a1d52994d440e21def1c2174932410b4f2a98a1
- http://www.securityfocus.com/bid/107296
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1792
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.14
- https://lists.debian.org/debian-lts-announce/2019/03/msg00034.html
- http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00045.html
- https://lists.debian.org/debian-lts-announce/2019/04/msg00004.html
- https://usn.ubuntu.com/3932-1/
- https://usn.ubuntu.com/3932-2/
- https://usn.ubuntu.com/3930-1/
- https://usn.ubuntu.com/3931-1/
- https://usn.ubuntu.com/3933-2/
- https://usn.ubuntu.com/3931-2/
- https://usn.ubuntu.com/3930-2/
- https://usn.ubuntu.com/3933-1/
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00052.html
- https://access.redhat.com/errata/RHSA-2019:0831
- https://lists.debian.org/debian-lts-announce/2019/05/msg00002.html
- https://access.redhat.com/errata/RHSA-2019:1479
- https://access.redhat.com/errata/RHSA-2019:1480
- http://packetstormsecurity.com/files/156053/Reliable-Datagram-Sockets-RDS-rds_atomic_free_op-Privilege-Escalation.html
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Affected Vendor
linux
View all reports →Affected Software
linux kernel, debian linux, enterprise linux, leap, ubuntu linux
Vulnerable Versions:
4.9, 4.14, 4.19, 4.20, 8.0, 7.0, 15.0, 42.3, 12.04, 14.04, 16.04, 18.10
Timeline
Official Publish:
March 5th, 2019
Last Modified:
August 4th, 2024
Added to House:
July 20th, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weaknesses (CWE)
No CWE data available
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.