CVE-2019-20054: linux linux_kernel NULL Pointer Dereference
CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2019-20054DEBIAN-CVE-2019-20054
Published 28-12-2019Last modified 05-08-2024
Vulnerability summary
CVE-2019-20054 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux linux_kernel. EPSS estimates a 0.48% chance of exploitation in the next 30 days, higher than 39.7% of scored vulnerabilities.
CVSS score
5.5/10
010
Medium · v3.1 (NVD)EPSS score
0.48%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 17 · Related 12OPENSUSE-SU-2020:0336-1RHSA-2020:1493RHSA-2020:4060RHSA-2020:4062RHSA-2020:4431RHSA-2020:4609SUSE-SU-2020:0093-1SUSE-SU-2020:0511-1SUSE-SU-2020:0559-1SUSE-SU-2020:0560-1SUSE-SU-2020:0580-1SUSE-SU-2020:0584-1SUSE-SU-2020:0599-1SUSE-SU-2020:0613-1SUSE-SU-2020:1255-1SUSE-SU-2020:1275-1SUSE-SU-2020:1663-1
Timeline
- 28-12-2019PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
In the Linux kernel before 5.0.6, there is a NULL pointer dereference in drop_sysctl_table() in fs/proc/proc_sysctl.c, related to put_links, aka CID-23da9588037e.
CVSS metrics
4 scores · 3 sources · 2 versionsMedium 5.5Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Medium 4.9Preferred score · NVD (NIST)
AV:L/AC:L/Au:N/C:N/I:N/A:CSourcesSingle source
EPSS trend
Probability
0.48%
Chance of exploitation in the next 30 days
Percentile
40%
Versus all other CVEs
30-day change
0.00 pp
From 0.48% on 18-09-2026
18-09-202618-10-2026
EPSS score0.48%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu27 products
- linuxAll versions (No fix recorded) | < 4.4.0-157.185 | < 4.15.0-60.67
- linux-aws< 4.4.0-1054.58 | < 4.4.0-1090.101 | < 4.15.0-1047.49
- linux-aws-fips< 4.15.0-2018.18 | All versions (No fix recorded)
- linux-aws-hwe< 4.15.0-1047.49~16.04.1
- linux-azure< 4.15.0-1059.64~14.04.1 | < 4.15.0-1056.61 | < 5.0.0-1014.14~18.04.1
Netapp12 products
Debian1 product
- linux< 5.2.6-1
Linux1 product
- linux_kernel< 5.0.6
4 vendors · 41 products
References
11 links- cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.6X Refsource MISCREPORTRelease NotesVendor Advisory
- cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.0.11X Refsource MISCREPORTRelease NotesVendor Advisory
- lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.htmlVendor AdvisoryX Refsource SUSEBroken LinkThird Party Advisory
