Impact: Moderate Public Date: 2019-02-27 CWE: CWE-476 Bugzilla: 1686136: CVE-2019-9213 kernel: lack of check for mmap minimum address in expand_downwards in mm/mmap.c leads to NULL pointer dereferences exploit on non-SMAP platforms 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.
The MITRE CVE dictionary describes this issue as:
Find out more about CVE-2019-9213 from the MITRE CVE dictionary dictionary and NIST NVD.
NOTE: The following CVSS v3 metrics and score provided are preliminary and subject to review.
CVSS3 Base Score | 5.7 |
---|---|
CVSS3 Base Metrics | CVSS:3.0/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Attack Vector | Adjacent Network |
Attack Complexity | Low |
Privileges Required | Low |
User Interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity Impact | None |
Availability Impact | High |
Platform | Package | State |
---|---|---|
Red Hat Enterprise MRG 2 | kernel | Under investigation |
Red Hat Enterprise Linux 7 | kernel-alt | Under investigation |
Red Hat Enterprise Linux 7 | kernel | Under investigation |
Red Hat Enterprise Linux 7 | kernel-rt | Under investigation |
Red Hat Enterprise Linux 6 | kernel | Under investigation |
Red Hat Enterprise Linux 5 | kernel | Under investigation |