An issue was discovered in net/ipv4/sysctl_net_ipv4.c in the Linux kernel before 5.0.11.
Priority MEDIUM 48CWE-190Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-190 and the CVSS impact.
Summary
An issue was discovered in net/ipv4/sysctl_net_ipv4.c in the Linux kernel before 5.0.11. There is a net/ipv4/tcp_input.c signed integer overflow in tcp_ack_update_rtt() when userspace writes a very large integer to /proc/sys/net/ipv4/tcp_min_rtt_wlen, leading to a denial of service or possibly unspecified other impact, aka CID-19fad20d15a6.
Why it matters now
EPSS 0.03474 89th percentileScored 2026-11-07
Fix Fixed Red Hat: 3 advisories
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 30
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 4.4 to before 4.4.180; 4.9 to before 4.9.172; 4.14 to before 4.14.115; 4.19 to before 4.19.38; 5.0 to before 5.0.11 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.1:rc1:*:*:*:*:*:* | 5.1 rc1 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.1:rc2:*:*:*:*:*:* | 5.1 rc2 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.1:rc3:*:*:*:*:*:* | 5.1 rc3 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.1:rc4:*:*:*:*:*:* | 5.1 rc4 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.1:rc5:*:*:*:*:*:* | 5.1 rc5 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.1:rc6:*:*:*:*:*:* | 5.1 rc6 | Vulnerable | Linux |
| cpe:2.3:o:linux:linux_kernel:5.1:rc7:*:*:*:*:*:* | 5.1 rc7 | Vulnerable | Linux |
| cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:* | 15.0 | Vulnerable | openSUSE |
| cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* | 15.1 | Vulnerable | openSUSE |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.4 to before 4.4.180; 4.9 to before 4.9.172; 4.14 to before 4.14.115; 4.19 to before 4.19.38; 5.0 to before 5.0.11 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.1:rc1:*:*:*:*:*:* Versions 5.1 rc1 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.1:rc2:*:*:*:*:*:* Versions 5.1 rc2 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.1:rc3:*:*:*:*:*:* Versions 5.1 rc3 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.1:rc4:*:*:*:*:*:* Versions 5.1 rc4 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.1:rc5:*:*:*:*:*:* Versions 5.1 rc5 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.1:rc6:*:*:*:*:*:* Versions 5.1 rc6 Vulnerable ·Linux
- cpe:2.3:o:linux:linux_kernel:5.1:rc7:*:*:*:*:*:* Versions 5.1 rc7 Vulnerable ·Linux
- cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:* Versions 15.0 Vulnerable ·openSUSE
- cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:* Versions 15.1 Vulnerable ·openSUSE
Show 20 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* | 7.0 | Vulnerable | Red Hat |
| cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:data_availability_services:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:* | 11.0.0 – 11.60.3 | Vulnerable | NetApp |
| cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:hci_storage_node:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:o:broadcom:fabric_operating_system:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Broadcom |
| cpe:2.3:o:netapp:aff_a700s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:aff_a700s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:fas8300_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:fas8300:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:fas8700_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:fas8700:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:aff_a400_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:aff_a400:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
| cpe:2.3:o:netapp:h610s_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | NetApp |
| cpe:2.3:h:netapp:h610s:-:*:*:*:*:*:*:* | not specified by NVD | Running on | NetApp |
- cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:* Versions 7.0 Vulnerable ·Red Hat
- cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:data_availability_services:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:e-series_santricity_os_controller:*:*:*:*:*:*:*:* Versions 11.0.0 – 11.60.3 Vulnerable ·NetApp
- cpe:2.3:a:netapp:hci_management_node:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:solidfire:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:a:netapp:steelstore_cloud_integrated_storage:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:hci_compute_node:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:hci_storage_node:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:o:broadcom:fabric_operating_system:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Broadcom
- cpe:2.3:o:netapp:aff_a700s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:aff_a700s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:fas8300_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:fas8300:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:fas8700_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:fas8700:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:aff_a400_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:aff_a400:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
- cpe:2.3:o:netapp:h610s_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·NetApp
- cpe:2.3:h:netapp:h610s:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·NetApp
Remediation
Red Hat 3 advisories
- RHSA-2020:1769 Released 2020-04-28 · Red Hat rating Importantkernel security, bug fix, and enhancement update
- Red Hat CodeReady Linux Builder (v. 8) kernel-tools-libs-devel-4.18.0-193.el8
- Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-193.el8, kernel-4.18.0-193.el8, kernel-abi-whitelists-4.18.0-193.el8 +19
- RHSA-2020:1567 Released 2020-04-28 · Red Hat rating Importantkernel-rt security, bug fix, and enhancement update
- Red Hat Enterprise Linux Real Time (v. 8) kernel-rt-4.18.0-193.rt13.51.el8, kernel-rt-core-4.18.0-193.rt13.51.el8, kernel-rt-debug-4.18.0-193.rt13.51.el8 +7
- Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt-4.18.0-193.rt13.51.el8, kernel-rt-core-4.18.0-193.rt13.51.el8, kernel-rt-debug-4.18.0-193.rt13.51.el8 +9
- RHSA-2020:0740 Released 2020-03-09 · Red Hat rating Importantkernel-alt security and bug fix update
- Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) kernel-4.14.0-115.18.1.el7a, kernel-abi-whitelists-4.14.0-115.18.1.el7a, kernel-alt-4.14.0-115.18.1.el7a +8
- Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) kernel-debug-devel-4.14.0-115.18.1.el7a, kernel-tools-libs-devel-4.14.0-115.18.1.el7a
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat CodeReady Linux Builder (v. 8) | Fixed | RHSA-2020:1769 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2020:1769 |
| Red Hat Enterprise Linux Real Time (v. 8) | Fixed | RHSA-2020:1567 |
| Red Hat Enterprise Linux Real Time for NFV (v. 8) | Fixed | RHSA-2020:1567 |
| Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server (v. 7) | Fixed | RHSA-2020:0740 |
| Red Hat Enterprise Linux for ARM and IBM Power LE (POWER9) Server Optional (v. 7) | Fixed | RHSA-2020:0740 |
Not affected: 4 products
- Red Hat Enterprise Linux 5
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise MRG 2
Timeline
- 2026-10-02 Threatist record created from CVE-2019-18805
- 2026-10-03 Alias added: GHSA-wgj3-wxrf-qqg3
References
Patch 2
Sources
- CVE-2019-18805 · CVE Program
- CVE-2019-18805 · NVD
- FIRST EPSS
- GHSA-wgj3-wxrf-qqg3 · GitHub Advisory Database · CC BY 4.0
- CVE-2019-18805 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences