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CVE-2019-9213

33
FAUCET Score

CVE-2019-9213 is a Linux kernel vulnerability (before version 4.20.14) affecting Canonical, Debian, Linux, OpenSUSE, and Red Hat distributions, where a missing check in memory management makes it easier to exploit kernel NULL pointer dereferences. With a CVSS score of 5.5 (MEDIUM), it allows a local attacker with low privileges to cause a denial of service (system crash) with low attack complexity. While not listed on CISA's KEV catalog, exploit code, including a Metasploit module, is publicly available, though there is no evidence of active exploitation or significant community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
>= 4.9, < 4.9.162CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 4.14, < 4.14.105CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 4.19, < 4.19.27CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 4.20, < 4.20.14CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.5MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
1.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
5.67%
Probability of exploitation in next 30 days
EPSS Percentile
92.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Metasploit: Reliable Datagram Sockets (RDS) rds_atomic_free_op NULL pointer dereference Privilege Escalation · Nov 1, 2018
ExploitDB: EDB-47957 · Jan 23, 2020
This CVE's current EPSS score of 0.0567 is in the 100th percentile among its peer group of 15,940 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-alt-0:4.14.0-115.7.1.el7a
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-rt-0:4.18.0-80.4.2.rt9.152.el8_0
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: kernel-0:4.18.0-80.4.2.el8_0
View patch

Vendor Advisories (1)

redhatCVE-2019-9213Important

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

Feb 27, 2019

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
PatchVendor Advisory
lists.opensuse.org / opensuse-security-announce/2019-03/msg00045.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2019-04/msg00052.html
Mailing ListThird Party Advisory
packetstormsecurity.com / files/156053/Reliable-Datagram-Sockets-RDS-rds_atomic_free_op-Privilege-Escalation.html
ExploitThird Party AdvisoryVDB Entry
access.redhat.com / errata/RHSA-2019:0831
Third Party Advisory
access.redhat.com / errata/RHSA-2019:1479
Third Party Advisory
access.redhat.com / errata/RHSA-2019:1480
Third Party Advisory
bugs.chromium.org / p/project-zero/issues/detail
ExploitMailing ListThird Party Advisory
cdn.kernel.org / pub/linux/kernel/v4.x/ChangeLog-4.14.105
Mailing ListPatchVendor Advisory
cdn.kernel.org / pub/linux/kernel/v4.x/ChangeLog-4.19.27
Mailing ListPatchVendor Advisory
cdn.kernel.org / pub/linux/kernel/v4.x/ChangeLog-4.20.14
Mailing ListPatchVendor Advisory
cdn.kernel.org / pub/linux/kernel/v4.x/ChangeLog-4.9.162
Mailing ListPatchVendor Advisory
github.com / torvalds/linux/commit/0a1d52994d440e21def1c2174932410b4f2a98a1
Mailing ListPatchVendor Advisory
lists.debian.org / debian-lts-announce/2019/03/msg00034.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2019/04/msg00004.html
Mailing ListThird Party Advisory
lists.debian.org / debian-lts-announce/2019/05/msg00002.html
Mailing ListThird Party Advisory
usn.ubuntu.com / 3930-1
Third Party Advisory
usn.ubuntu.com / 3930-2
Third Party Advisory
usn.ubuntu.com / 3931-1
Third Party Advisory
usn.ubuntu.com / 3931-2
Third Party Advisory
usn.ubuntu.com / 3932-1
Third Party Advisory
usn.ubuntu.com / 3932-2
Third Party Advisory
usn.ubuntu.com / 3933-1
Third Party Advisory
usn.ubuntu.com / 3933-2
Third Party Advisory
exploit-db.com / exploits/46502
ExploitThird Party AdvisoryVDB Entry
securityfocus.com / bid/107296
Third Party AdvisoryVDB Entry