CVE-2019-19462: canonical ubuntu_linux NULL Pointer Dereference
Vulnerability summary
CVE-2019-19462 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in canonical ubuntu_linux. EPSS estimates a 0.46% chance of exploitation in the next 30 days, higher than 39.9% of scored vulnerabilities.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 23 · Related 19Timeline
- 30-11-2019PublishedVulnerability first disclosed.
- 08-10-2026Last modifiedVulnerability information updated.
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.
CVSS metrics
4 scores · 3 sources · 2 versions- 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
EPSS trend
Probability
0.46%
Chance of exploitation in the next 30 days
Percentile
40%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.46% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu41 products
- linux< 4.15.0-109.110 | < 5.4.0-42.46
- linux-aws< 4.15.0-1077.81 | < 5.4.0-1020.20
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.3< 5.3.0-1032.34~18.04.2
- linux-aws-fips< 4.15.0-2022.22 | All versions (No fix recorded)
Netapp5 products
- active_iq_unified_manager≥ 9.5 (No fix recorded)
- hci_compute_nodena
- hci_management_nodena
- hci_storage_node_firmwarena
- solidfirena
Debian2 products
- linux< 5.6.14-2
- debian_linuxEOL8.0 | 9.0 | 10.0
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 18.04 | 20.04
Linux1 product
- linux_kernel≤ 5.4.1
Opensuse1 product
- leapEOL15.1 | 15.2
6 vendors · 51 products
References
23 links- syzkaller-ppc64.appspot.com/bug?id=1c09906c83a8ea811a9e318c2a4f8e243becc6f8X Refsource MISCPatchThird Party Advisory
- syzkaller-ppc64.appspot.com/bug?id=b05b4d005191cc375cdf848c3d4d980308d50531X Refsource MISCPatchThird Party Advisory
- syzkaller.appspot.com/bug?id=e4265490d26d6c01cd9bc79dc915ef0a1bf15046X Refsource MISCThird Party Advisory
- syzkaller.appspot.com/bug?id=f4d1cb4330bd3ddf4a628332b4285407b2eedd7bX Refsource MISCThird Party Advisory
- lore.kernel.org/lkml/20191129013745.7168-1-dja%40axtens.net/X Refsource MISC
lists.debian.org/debian-lts-announce/2020/06/msg00012.htmlMailing ListX Refsource MLISTThird Party Advisory- lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory