MEDIUM
CVE-2019-19462
CWE-476Published: November 30, 2019· Updated: Jun 17, 2026
5.5
CVSS v3.1
Official Description
relay_open in kernel/relay.c in the Linux kernel through 5.4.1 allows local users to cause a denial of service (such as relay blockage) by triggering a NULL alloc_percpu result.
Technical Analysis
CVE-2019-19462 requires local access, meaning attackers must already have a foothold on the target system.
Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.
A successful exploit results in availability disruption (denial of service), with a CVSS base score of 5.5.
CVSS v3.1 Vector Breakdown
Exploitability
Attack VectorLocal
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Vendors & Products
Exploit & PoC Resources
NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.
Official Patches & Advisories
ADVISORYhttps://usn.ubuntu.com/4414-1/
ADVISORYhttps://usn.ubuntu.com/4425-1/
ADVISORYhttps://usn.ubuntu.com/4439-1/
ADVISORYhttps://usn.ubuntu.com/4440-1/
ADVISORYhttps://usn.ubuntu.com/4414-1/
ADVISORYhttps://usn.ubuntu.com/4425-1/
ADVISORYhttps://usn.ubuntu.com/4439-1/
ADVISORYhttps://usn.ubuntu.com/4440-1/
All References (30)
→
http://lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.htmlMailing List · Third Party Advisory
→
http://lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.htmlMailing List · Third Party Advisory
→
https://lists.debian.org/debian-lts-announce/2020/06/msg00012.htmlMailing List · Third Party Advisory
→
https://security.netapp.com/advisory/ntap-20210129-0004/Third Party Advisory
→
https://syzkaller-ppc64.appspot.com/bug?id=1c09906c83a8ea811a9e318c2a4f8e243becc6f8Patch · Third Party Advisory
→
https://syzkaller-ppc64.appspot.com/bug?id=b05b4d005191cc375cdf848c3d4d980308d50531Patch · Third Party Advisory
→
https://syzkaller.appspot.com/bug?id=e4265490d26d6c01cd9bc79dc915ef0a1bf15046Third Party Advisory
→
https://syzkaller.appspot.com/bug?id=f4d1cb4330bd3ddf4a628332b4285407b2eedd7bThird Party Advisory
→
https://usn.ubuntu.com/4414-1/Third Party Advisory
→
https://usn.ubuntu.com/4425-1/Third Party Advisory
→
https://usn.ubuntu.com/4439-1/Third Party Advisory
→
https://usn.ubuntu.com/4440-1/Third Party Advisory
→
https://www.debian.org/security/2020/dsa-4698Third Party Advisory
→
https://www.debian.org/security/2020/dsa-4699Third Party Advisory
Quick Facts
CVE IDCVE-2019-19462
CVSS Score5.5 / 10
SeverityMEDIUM
WeaknessCWE-476
CISA KEVNo
Affected5 vendor(s)
PublishedNov 30, 2019
Related CVEs (CWE-476)
Recommended Actions
- →Apply vendor patches immediately
- →Monitor CVE-2019-19462 in threat intel feeds
- →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWatch. CVE data is provided under the NVD usage policy.