CVE-2019-14821: An out-of-bounds access issue was found in the Linux kernel, all versions through 5.3, in the way Linux kernel's KVM hypervisor implements t
Noroxi assessment
Priority: Monitor (action score 35/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.76% (FIRST EPSS); higher than 55.6% of all records.
- Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
- Fixed version: linux (Debian:10) 4.19.67-2+deb10u1; linux (Debian:12) 5.2.17-1; linux (Debian:8) 3.16.74-1.
- Mentioned 2 times in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to linux (Debian:10) 4.19.67-2+deb10u1; linux (Debian:12) 5.2.17-1; linux (Debian:8) 3.16.74-1 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
An out-of-bounds access issue was found in the Linux kernel, all versions through 5.3, in the way Linux kernel's KVM hypervisor implements the Coalesced MMIO write operation. It operates on an MMIO ring buffer 'struct kvm_coalesced_mmio' object, wherein write indices 'ring->first' and 'ring->last' value could be supplied by a host user-space process. An unprivileged host user or process with access to '/dev/kvm' device could use this flaw to crash the host kernel, resulting in a denial of service or potentially escalating privileges on the system.
- BDU:2019-04677
- DLA-1930-1
- DLA-1940-1
- DSA-4531-1
- openSUSE-SU-2019:2307-1
- openSUSE-SU-2019:2308-1
- RHSA-2019:3309
- RHSA-2019:3517
- RHSA-2019:3978
- RHSA-2019:3979
- RHSA-2019:4154
- RHSA-2019:4256
- RHSA-2020:0027
- RHSA-2020:0204
- RHSA-2020:2851
- SUSE-SU-2019:14218-1
- SUSE-SU-2019:2648-1
- SUSE-SU-2019:2651-1
- SUSE-SU-2019:2658-1
- SUSE-SU-2019:2706-1
- Published
- Sep 19, 2019
- Updated
- Jun 16, 2026
- EPSS
- 0.7% · 55th percentile
- CWE
- CWE-787
Report tools
Action score
35
Monitor
Low priority for now.
- CVSS
- 35 / 40 · 8.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.7%
CNA vs NVD score
- NVD
- 8.8
- CNA · redhat
- 7.5
- 1.3 point gap
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:H
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_kernel |
| redhat | virtualization host | cpe:2.3:a:redhat:virtualization_host |
| redhat | enterprise linux | cpe:2.3:o:redhat:enterprise_linux |
| redhat | enterprise linux desktop | cpe:2.3:o:redhat:enterprise_linux_desktop |
| redhat | enterprise linux eus | cpe:2.3:o:redhat:enterprise_linux_eus |
| redhat | enterprise linux for real time | cpe:2.3:o:redhat:enterprise_linux_for_real_time |
| redhat | enterprise linux server | cpe:2.3:o:redhat:enterprise_linux_server |
| redhat | enterprise linux server aus | cpe:2.3:o:redhat:enterprise_linux_server_aus |
| redhat | enterprise linux server tus | cpe:2.3:o:redhat:enterprise_linux_server_tus |
| redhat | enterprise linux workstation | cpe:2.3:o:redhat:enterprise_linux_workstation |
| canonical | ubuntu linux | cpe:2.3:o:canonical:ubuntu_linux |
| opensuse | leap | cpe:2.3:o:opensuse:leap |
and 26 more
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- canonical ubuntu linux14.04
- canonical ubuntu linux16.04
- canonical ubuntu linux18.04
- canonical ubuntu linux19.04
- debian debian linux10.0
- debian debian linux8.0
- debian debian linux9.0
- fedoraproject fedora29
- fedoraproject fedora30
- linux linux kernel2.6.27 and later · up to 3.15.10 inclusive
- linux linux kernel3.16 and later · before 3.16.74
- linux linux kernel4.4 and later · before 4.4.194
- linux linux kernel4.9 and later · before 4.9.194
- linux linux kernel4.14 and later · before 4.14.146
- linux linux kernel4.19 and later · before 4.19.75
- linux linux kernel5.2 and later · before 5.2.17
- linux linux kernel5.3 and later · before 5.3.1
- linux linux kernel5.4
- netapp aff a700s firmwareall versions
- netapp data availability servicesall versions
Versions reported by the vendor
Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.
Linux Kernel
- all through 5.3affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:10 | linux | before 4.19.67-2+deb10u1 | 4.19.67-2+deb10u1 |
| Debian:12 | linux | before 5.2.17-1 | 5.2.17-1 |
| Debian:8 | linux | before 3.16.74-1 | 3.16.74-1 |
| Debian:8 | linux-4.9 | before 4.9.189-3+deb9u1~deb8u1 | 4.9.189-3+deb9u1~deb8u1 |
| Debian:9 | linux | before 4.9.189-3+deb9u1 | 4.9.189-3+deb9u1 |
| openSUSE:Leap 15.0 | kernel-debug | before 4.12.14-lp150.12.76.1 | 4.12.14-lp150.12.76.1 |
| openSUSE:Leap 15.0 | kernel-default | before 4.12.14-lp150.12.76.1 | 4.12.14-lp150.12.76.1 |
| openSUSE:Leap 15.0 | kernel-docs | before 4.12.14-lp150.12.76.1 | 4.12.14-lp150.12.76.1 |
| openSUSE:Leap 15.0 | kernel-kvmsmall | before 4.12.14-lp150.12.76.1 | 4.12.14-lp150.12.76.1 |
| openSUSE:Leap 15.0 | kernel-obs-build | before 4.12.14-lp150.12.76.1 | 4.12.14-lp150.12.76.1 |
| openSUSE:Leap 15.0 | kernel-obs-qa | before 4.12.14-lp150.12.76.1 | 4.12.14-lp150.12.76.1 |
| openSUSE:Leap 15.0 | kernel-source | before 4.12.14-lp150.12.76.1 | 4.12.14-lp150.12.76.1 |
| openSUSE:Leap 15.0 | kernel-syms | before 4.12.14-lp150.12.76.1 | 4.12.14-lp150.12.76.1 |
| openSUSE:Leap 15.0 | kernel-vanilla | before 4.12.14-lp150.12.76.1 | 4.12.14-lp150.12.76.1 |
| openSUSE:Leap 15.1 | kernel-debug | before 4.12.14-lp151.28.20.1 | 4.12.14-lp151.28.20.1 |
| openSUSE:Leap 15.1 | kernel-default | before 4.12.14-lp151.28.20.1 | 4.12.14-lp151.28.20.1 |
| openSUSE:Leap 15.1 | kernel-docs | before 4.12.14-lp151.28.20.1 | 4.12.14-lp151.28.20.1 |
| openSUSE:Leap 15.1 | kernel-kvmsmall | before 4.12.14-lp151.28.20.1 | 4.12.14-lp151.28.20.1 |
| openSUSE:Leap 15.1 | kernel-obs-build | before 4.12.14-lp151.28.20.1 | 4.12.14-lp151.28.20.1 |
| openSUSE:Leap 15.1 | kernel-obs-qa | before 4.12.14-lp151.28.20.1 | 4.12.14-lp151.28.20.1 |
| openSUSE:Leap 15.1 | kernel-source | before 4.12.14-lp151.28.20.1 | 4.12.14-lp151.28.20.1 |
| openSUSE:Leap 15.1 | kernel-syms | before 4.12.14-lp151.28.20.1 | 4.12.14-lp151.28.20.1 |
| openSUSE:Leap 15.1 | kernel-vanilla | before 4.12.14-lp151.28.20.1 | 4.12.14-lp151.28.20.1 |
| Red Hat:enterprise_linux:6::client | kernel | before 0:2.6.32-754.25.1.el6 | 0:2.6.32-754.25.1.el6 |
+96
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV90Now
- CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
Published before and after this one in the same product
- ← EarlierCVE-2019-14835Sep 17, 2019 · A buffer overflow flaw was found, in versions from 2.6.34 to 5.2.x, in the way Linux kernel's vhost functionality that translates virtqueue 31Monitor
- ← EarlierCVE-2019-16413Sep 18, 2019 · An issue was discovered in the Linux kernel before 5.0.4.31Monitor
- Later →CVE-2019-14814Sep 20, 2019 · There is heap-based buffer overflow in Linux kernel, all versions up to, excluding 5.3, in the marvell wifi chip driver in Linux kernel, tha31Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:linux | 5.2.17-1 · Debian:12 | Package registry (OSV) |
| debian:linux-4.9 | 4.9.189-3+deb9u1~deb8u1 · Debian:8 | Package registry (OSV) |
| opensuse:kernel-debug | 4.12.14-lp150.12.76.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-default | 4.12.14-lp150.12.76.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-docs | 4.12.14-lp150.12.76.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-kvmsmall | 4.12.14-lp150.12.76.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-obs-build | 4.12.14-lp150.12.76.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-obs-qa | 4.12.14-lp150.12.76.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-source | 4.12.14-lp150.12.76.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-syms | 4.12.14-lp150.12.76.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| opensuse:kernel-vanilla | 4.12.14-lp150.12.76.1 · openSUSE:Leap 15.0 | Package registry (OSV) |
| red hat:kernel-rt | 0:4.18.0-147.rt24.93.el8 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-core | 0:4.18.0-147.rt24.93.el8 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug | 0:4.18.0-147.rt24.93.el8 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug-core | 0:4.18.0-147.rt24.93.el8 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug-debuginfo | 0:4.18.0-147.rt24.93.el8 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug-devel | 0:4.18.0-147.rt24.93.el8 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug-kvm | 0:4.18.0-147.rt24.93.el8 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug-kvm-debuginfo | 0:4.18.0-147.rt24.93.el8 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug-modules | 0:4.18.0-147.rt24.93.el8 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-debug-modules-extra | 0:4.18.0-147.rt24.93.el8 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-debuginfo | 0:4.18.0-147.rt24.93.el8 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| red hat:kernel-rt-debuginfo-common-x86_64 | 0:4.18.0-147.rt24.93.el8 · Red Hat:enterprise_linux:8::nfv | Package registry (OSV) |
| suse:kernel-azure | 4.12.14-6.26.1 · SUSE:Linux Enterprise Server 12 SP4 | Package registry (OSV) |
| suse:kernel-bigmem | 3.0.101-108.108.1 · SUSE:Linux Enterprise Server 11 SP4-LTSS | Package registry (OSV) |
| suse:kernel-default | 3.0.101-108.108.1 · SUSE:Linux Enterprise Server 11 SP4-LTSS | Package registry (OSV) |
| suse:kernel-ec2 | 3.0.101-108.108.1 · SUSE:Linux Enterprise Server 11 SP4-LTSS | Package registry (OSV) |
| suse:kernel-pae | 3.0.101-108.108.1 · SUSE:Linux Enterprise Server 11 SP4-LTSS | Package registry (OSV) |
| suse:kernel-ppc64 | 3.0.101-108.108.1 · SUSE:Linux Enterprise Server 11 SP4-LTSS | Package registry (OSV) |
| suse:kernel-source | 3.0.101-108.108.1 · SUSE:Linux Enterprise Server 11 SP4-LTSS | Package registry (OSV) |
+5
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
No history yet (it accumulates with the daily EPSS job).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-21-0208 · Mar 8, 2021(IBM Güvenlik Bülteni Yayınladı)
- TR-19-262 · Nov 12, 2019(Linux Kernel Güvenlik Güncellemesi)
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- A low-privileged account is enough.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
Impact can extend beyond the vulnerable component (scope changes).
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Changed
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-787 · Out-of-bounds WriteCVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (19 more)Show less
- lists.opensuse.org/opensuse-security-announce/2019-10/msg00036.html
- lists.opensuse.org/opensuse-security-announce/2019-10/msg00037.html
- packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice-LSN-0058-1.html
- packetstormsecurity.com/files/155212/Slackware-Security-Advisory-Slackware-14.2-kernel-Updates.html
- www.openwall.com/lists/oss-security/2019/09/20/1
- access.redhat.com/errata/RHSA-2019:3309
- access.redhat.com/errata/RHSA-2019:3517
- access.redhat.com/errata/RHSA-2019:3978
- access.redhat.com/errata/RHSA-2019:3979
- access.redhat.com/errata/RHSA-2019:4154
- access.redhat.com/errata/RHSA-2019:4256
- access.redhat.com/errata/RHSA-2020:0027
- access.redhat.com/errata/RHSA-2020:0204
- bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14821
- lists.debian.org/debian-lts-announce/2019/09/msg00025.html
- lists.debian.org/debian-lts-announce/2019/10/msg00000.html
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TRZQQQANZWQMPILZV7OTS3RGGRLLE2Q7/
- lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YW3QNMPENPFEGVTOFPSNOBL7JEIJS25P/
- seclists.org/bugtraq/2019/Nov/11
Vendor advisories and official records. Exploit/PoC links are deliberately left out.