5.5

CVE-2019-9213: canonical ubuntu_linux NULL Pointer Dereference

Modified
AliasesMGASA-2019-0120SUSE-SU-2019:0761-1UBUNTU-CVE-2019-9213
Published 05-03-2019Last modified 04-08-2024

Vulnerability summary

CVE-2019-9213 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in canonical ubuntu_linux. EPSS estimates a 5.67% chance of exploitation in the next 30 days, higher than 92.9% of scored vulnerabilities. 5 public exploits are recorded.

Priority
Prioritiseweaponized exploit

Weaponized exploit (exploit-database, 23-01-2020)

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
5.67%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits5reference, exploit-database, metasploit

Advisory lineage

Upstream 0 · Downstream 33 · Related 26
DLA-1731-1DLA-1771-1MGASA-2019-0171MGASA-2019-0172OPENSUSE-SU-2019:1193-1RHSA-2019:0831

Timeline

  1. 05-03-2019
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

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 metrics

5 scores · 3 sources · 3 versions

EPSS trend

Probability

5.67%

Chance of exploitation in the next 30 days

Percentile

93%

Versus all other CVEs

30-day change

No change 0.00 pp

From 5.67% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

5 found
  • referenceUnverified

    Exploit Reference (bugs.chromium.org)

    Maturity: unknown

  • referenceUnverified

    Exploit Reference (packetstormsecurity.com)

    Maturity: unknown

  • exploit-databasedoslinuxVerified

    Linux < 4.20.14 - Virtual Address 0 is Mappable via Privileged write() to /proc/*/mem

    Maturity: poc

Show all 5 exploits
  • exploit-databaselocallinuxVerified

    Reliable Datagram Sockets (RDS) - rds_atomic_free_op NULL pointer dereference Privilege Escalation (Metasploit)

    Maturity: weaponized

  • MetasploitMetasploitremoteVerified

    Reliable Datagram Sockets (RDS) rds_atomic_free_op NULL pointer dereference Privilege Escalation

    exploit/linux/local/rds_atomic_free_op_null_pointer_deref_priv_esc

    Maturity: weaponized

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu20 products
  • linux< 3.13.0-168.218 | < 4.4.0-145.171 | < 4.15.0-47.50
  • linux-aws< 4.4.0-1040.43 | < 4.4.0-1079.89 | < 4.15.0-1035.37
  • linux-aws-hwe< 4.15.0-1035.37~16.04.1
  • linux-azure< 4.15.0-1041.45~14.04.1 | < 4.15.0-1041.45 | < 4.18.0-1014.14~18.04.1
  • linux-azure-fdeAll versions (No fix recorded)
Mageia6 products
  • kernel< 4.14.106-1.mga6
  • kernel-userspace-headers< 4.14.106-1.mga6
  • kmod-vboxadditions< 5.2.24-9.mga6
  • kmod-virtualbox< 5.2.24-9.mga6
  • kmod-xtables-addons< 2.13-83.mga6
Debian2 products
Canonical1 product
Linux1 product
  • linux_kernel≥ 4.9, < 4.9.162 | ≥ 4.14, < 4.14.105 | ≥ 4.19, < 4.19.27 | ≥ 4.20, < 4.20.14
Opensuse1 product
Redhat1 product
Suse1 product
  • kgraft-patch-SLE12-SP3_Update_23&distro=SUSE Linux Enterprise Live Patching 12 SP3< 2-2.1

8 vendors · 33 products

References

43 links
Show all 43 references