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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.9, < 4.9.162 |
| Debian | Debian Linux | 8.0 |
| Redhat | Enterprise Linux | 7.0 |
| Opensuse | Leap | 15.0 |
| Canonical | Ubuntu Linux | 12.04 |
Related Weaknesses (CWE)
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=0a1d52PatchVendor Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00045.htmlMailing ListThird Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00052.htmlMailing ListThird Party Advisory
- http://packetstormsecurity.com/files/156053/Reliable-Datagram-Sockets-RDS-rds_atExploitThird Party AdvisoryVDB Entry
- http://www.securityfocus.com/bid/107296Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2019:0831Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1479Third Party Advisory
- https://access.redhat.com/errata/RHSA-2019:1480Third Party Advisory
- https://bugs.chromium.org/p/project-zero/issues/detail?id=1792ExploitMailing ListThird Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.105Mailing ListPatchVendor Advisory
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.27Mailing ListPatchVendor Advisory
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.14Mailing ListPatchVendor Advisory
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.162Mailing ListPatchVendor Advisory
- https://github.com/torvalds/linux/commit/0a1d52994d440e21def1c2174932410b4f2a98aMailing ListPatchVendor Advisory
- https://lists.debian.org/debian-lts-announce/2019/03/msg00034.htmlMailing ListThird Party Advisory
FAQ
What is CVE-2019-9213?
CVE-2019-9213 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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-SMA...
How severe is CVE-2019-9213?
CVE-2019-9213 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-9213?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Debian Debian Linux, Redhat Enterprise Linux, Opensuse Leap, Canonical Ubuntu Linux.