What is CVE-2019-19055?

CVE-2019-19055 is a medium-severity vulnerability in Linux Kernel, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 5.5/10. Published 2019-11-18.

How severe is CVE-2019-19055?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2019-19055 known to be exploited?

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

Vulnerability in Linux Kernel

CVE-2019-19055

A memory leak in the nl80211_get_ftm_responder_stats() function in net/wireless/nl80211.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption) by triggering nl80211hdr_put() failures, aka CID-1399c59fa929. NOTE: third parties dispute the relevance of this because it occurs on a code path where a successful allocation has already occurred

Published 2019-11-18 · last modified 2026-06-17.

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: 0.004 (32.4th percentile), scored 2026-10-01.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 32.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Linux Kernel
Canonical Ubuntu Linux — versions 18.04, 19.04, 19.10
Fedoraproject Fedora — versions 30, 31

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

github.com/torvalds/linux/commit/1399c59fa92984836db90538cf92397fe7caaa57 (Patch, Third Party Advisory)
bugzilla.suse.com/show_bug.cgi (Third Party Advisory, Issue Tracking)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
usn.ubuntu.com/4226-1/ (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/4225-1/ (vendor-advisory, Third Party Advisory)
usn.ubuntu.com/4225-2/ (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2019-19055?: CVE-2019-19055 is a medium-severity vulnerability in Linux Kernel, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 5.5/10. Published 2019-11-18.
How severe is CVE-2019-19055?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2019-19055 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.