NULL pointer dereference in Linux Kernel
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.057 (92.7th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 93rd percentile — 92.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.057 · newest: 0.057 · change: 0.000
Affected products
- Linux Kernel
- Canonical Ubuntu Linux — versions 12.04, 14.04, 16.04
- Debian Linux — versions 8.0
- openSUSE Leap — versions 15.0, 42.3
- Red Hat Enterprise Linux — versions 7.0, 8.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.exploit-db.com/exploits/46502/ (Exploit, VDB Entry, Third Party Advisory, exploit)
- git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/ (Patch, Vendor Advisory)
- cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.162 (Patch, Mailing List, Vendor Advisory)
- cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.19.27 (Patch, Mailing List, Vendor Advisory)
- cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.105 (Patch, Mailing List, Vendor Advisory)
- github.com/torvalds/linux/commit/0a1d52994d440e21def1c2174932410b4f2a98a1 (Patch, Mailing List, Vendor Advisory)
- www.securityfocus.com/bid/107296 (VDB Entry, Third Party Advisory, vdb-entry)
- bugs.chromium.org/p/project-zero/issues/detail (Exploit, Mailing List, Third Party Advisory)
- cdn.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.14 (Patch, Mailing List, Vendor Advisory)
- lists.debian.org/debian-lts-announce/2019/03/msg00034.html (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2019-9213?
- CVE-2019-9213 is a medium-severity vulnerability in Linux Kernel, classified under NULL Pointer Dereference. CVSS score: 5.5/10. Published 2019-03-05.
- How severe is CVE-2019-9213?
- Medium severity. CVSS v3 base score is 5.5 out of 10.
- Is CVE-2019-9213 known to be exploited?
- 25 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.