CVE-2019-9213
MEDIUMCVSS 5.5/10EPSS 5.67%
Last modified
CVE-2019-9213 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. 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.. EPSS estimates a 5.67% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 4.9, < 4.9.162 |
| Linux | Linux Kernel | >= 4.14, < 4.14.105 |
| Linux | Linux Kernel | >= 4.19, < 4.19.27 |
| Linux | Linux Kernel | >= 4.20, < 4.20.14 |
| Debian | Debian Linux | 8.0 |
| Redhat | Enterprise Linux | 7.0 |
| Redhat | Enterprise Linux | 8.0 |
| Opensuse | Leap | 15.0 |
| Opensuse | Leap | 42.3 |
| Canonical | Ubuntu Linux | 12.04 |
| Canonical | Ubuntu Linux | 14.04 |
| Canonical | Ubuntu Linux | 16.04 |
| Canonical | Ubuntu Linux | 18.10 |
References
- http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00045.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00052.htmlMailing List, Third Party Advisory
- http://packetstormsecurity.com/files/156053/Reliable-Datagram-Sockets-RDS-rds_atomic_free_op-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/107296Third Party Advisory, VDB 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=1792Exploit, Mailing List, Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.105Mailing List, Patch, Vendor Advisory
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.27Mailing List, Patch, Vendor Advisory
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.14Mailing List, Patch, Vendor Advisory
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.162Mailing List, Patch, Vendor Advisory
- https://github.com/torvalds/linux/commit/0a1d52994d440e21def1c2174932410b4f2a98a1Mailing List, Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2019/03/msg00034.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/04/msg00004.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/05/msg00002.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/3930-1/Third Party Advisory
- https://usn.ubuntu.com/3930-2/Third Party Advisory
- https://usn.ubuntu.com/3931-1/Third Party Advisory
- https://usn.ubuntu.com/3931-2/Third Party Advisory
- https://usn.ubuntu.com/3932-1/Third Party Advisory
- https://usn.ubuntu.com/3932-2/Third Party Advisory
- https://usn.ubuntu.com/3933-1/Third Party Advisory
- https://usn.ubuntu.com/3933-2/Third Party Advisory
- https://www.exploit-db.com/exploits/46502/Exploit, Third Party Advisory, VDB Entry
- http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00045.htmlMailing List, Third Party Advisory
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00052.htmlMailing List, Third Party Advisory
- http://packetstormsecurity.com/files/156053/Reliable-Datagram-Sockets-RDS-rds_atomic_free_op-Privilege-Escalation.htmlExploit, Third Party Advisory, VDB Entry
- http://www.securityfocus.com/bid/107296Third Party Advisory, VDB 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=1792Exploit, Mailing List, Third Party Advisory
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.105Mailing List, Patch, Vendor Advisory
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.27Mailing List, Patch, Vendor Advisory
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.14Mailing List, Patch, Vendor Advisory
- https://cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.162Mailing List, Patch, Vendor Advisory
- https://github.com/torvalds/linux/commit/0a1d52994d440e21def1c2174932410b4f2a98a1Mailing List, Patch, Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2019/03/msg00034.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/04/msg00004.htmlMailing List, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/05/msg00002.htmlMailing List, Third Party Advisory
- https://usn.ubuntu.com/3930-1/Third Party Advisory
- https://usn.ubuntu.com/3930-2/Third Party Advisory
- https://usn.ubuntu.com/3931-1/Third Party Advisory
- https://usn.ubuntu.com/3931-2/Third Party Advisory
- https://usn.ubuntu.com/3932-1/Third Party Advisory
- https://usn.ubuntu.com/3932-2/Third Party Advisory
- https://usn.ubuntu.com/3933-1/Third Party Advisory
- https://usn.ubuntu.com/3933-2/Third Party Advisory
- https://www.exploit-db.com/exploits/46502/Exploit, Third Party Advisory, VDB Entry
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2019-9213?
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.
How severe is CVE-2019-9213?
CVE-2019-9213 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 5.67% probability of exploitation in the next 30 days.
How do I fix CVE-2019-9213?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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