What is CVE-2019-19965?

CVE-2019-19965 is a medium-severity vulnerability in Linux Kernel, classified under NULL Pointer Dereference. CVSS score: 4.7/10. Published 2019-12-25.

How severe is CVE-2019-19965?

Medium severity. CVSS v3 base score is 4.7 out of 10.

Is CVE-2019-19965 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

NULL pointer dereference in Linux Kernel

CVE-2019-19965

In the Linux kernel through 5.4.6, there is a NULL pointer dereference in drivers/scsi/libsas/sas_discover.c because of mishandling of port disconnection during discovery, related to a PHY down race condition, aka CID-f70267f379b5.

Published 2019-12-25 · last modified 2026-10-08.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.007 (51.3th percentile), scored 2026-11-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

Public proof-of-concept exploits

References

git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/ (Exploit, Patch, Vendor Advisory)
lists.debian.org/debian-lts-announce/2020/01/msg00013.html (mailing-list, Mailing List, Third Party Advisory)
security.netapp.com/advisory/ntap-20200204-0002/ (Third Party Advisory)
usn.ubuntu.com/4285-1/ (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/4287-1/ (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/4286-2/ (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/4287-2/ (vendor-advisory, Third Party Advisory)
lists.debian.org/debian-lts-announce/2020/03/msg00001.html (mailing-list, Mailing List, Third Party Advisory)
usn.ubuntu.com/4284-1/ (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/4286-1/ (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2019-19965?: CVE-2019-19965 is a medium-severity vulnerability in Linux Kernel, classified under NULL Pointer Dereference. CVSS score: 4.7/10. Published 2019-12-25.
How severe is CVE-2019-19965?: Medium severity. CVSS v3 base score is 4.7 out of 10.
Is CVE-2019-19965 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.