CVE-2019-19227: linux linux_kernel NULL Pointer Dereference
CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2019-19227DEBIAN-CVE-2019-19227
Published 22-11-2019Last modified 05-08-2024
Vulnerability summary
CVE-2019-19227 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux linux_kernel. EPSS estimates a 0.64% chance of exploitation in the next 30 days, higher than 49.8% of scored vulnerabilities.
CVSS score
5.5/10
010
Medium · v3.1 (NVD)EPSS score
0.64%
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 19 · Related 17DLA-2068-1DLA-2114-1OPENSUSE-SU-2019:2675-1SUSE-SU-2019:3200-1SUSE-SU-2019:3289-1SUSE-SU-2019:3316-1SUSE-SU-2019:3317-1SUSE-SU-2019:3371-1SUSE-SU-2019:3372-1SUSE-SU-2019:3381-1SUSE-SU-2020:0093-1SUSE-SU-2020:0599-1SUSE-SU-2020:0613-1SUSE-SU-2020:14354-1USN-4254-1USN-4254-2USN-4258-1USN-4287-1USN-4287-2
Timeline
- 22-11-2019PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
In the AppleTalk subsystem in the Linux kernel before 5.1, there is a potential NULL pointer dereference because register_snap_client may return NULL. This will lead to denial of service in net/appletalk/aarp.c and net/appletalk/ddp.c, as demonstrated by unregister_snap_client, aka CID-9804501fa122.
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
Low 2.1Preferred score · NVD (NIST)
AV:L/AC:L/Au:N/C:N/I:N/A:PSourcesSingle source
EPSS trend
Probability
0.64%
Chance of exploitation in the next 30 days
Percentile
50%
Versus all other CVEs
30-day change
0.00 pp
From 0.64% on 18-09-2026
18-09-202618-10-2026
EPSS score0.64%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu30 products
- linuxAll versions (No fix recorded) | < 4.4.0-173.203 | < 4.15.0-88.88
- linux-aws< 4.4.0-1061.65 | < 4.4.0-1101.112 | < 4.15.0-1060.62
- linux-aws-5.0< 5.0.0-1024.27~18.04.1
- linux-aws-fips< 4.15.0-2018.18 | All versions (No fix recorded)
- linux-aws-hwe< 4.15.0-1060.62~16.04.1
Debian1 product
- linux< 5.2.6-1
Linux1 product
- linux_kernel< 5.1
3 vendors · 32 products
References
22 links- cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1X Refsource MISCREPORTRelease NotesVendor Advisory
- security.netapp.com/advisory/ntap-20200103-0001/X Refsource CONFIRM
