Junos OS: Kernel crash (vmcore) upon receipt of a specific link-local IPv6 packet on devices configured with Multi-Chassis Link Aggregation Group (MC-LAG)
Published Oct 9, 2019
6.5
MEDIUMCVSS 3.1
EPSS 0.53%
Description
Receipt of a specific link-local IPv6 packet destined to the RE may cause the system to crash and restart (vmcore). By continuously sending a specially crafted IPv6 packet, an attacker can repeatedly crash the system causing a prolonged Denial of Service (DoS). This issue affects Juniper Networks Junos OS: 16.1 versions prior to 16.1R6-S2, 16.1R7; 16.2 versions prior to 16.2R2-S10; 17.1 versions prior to 17.1R3. This issue does not affect Juniper Networks Junos OS version 15.1 and prior versions.
Affected products
-
- Version 16.1StatusaffectedConstraints<16.1R6-S2, 16.1R7
- Version 16.2StatusaffectedConstraints<16.2R2-S10
- Version 17.1StatusaffectedConstraints<17.1R3
- Version unspecifiedStatusunaffectedConstraints<=15.1
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Juniper Networks | Junos OS | n/a |
|
- 16.1
- 16.1
- 16.1
- 16.1
- 16.1
- 16.1
- 16.1
- 16.1
- 16.1
- 16.2
- 16.2
- 16.2
- 16.2
- 16.2
- 16.2
- 16.2
- 16.2
- 16.2
- 16.2
- 17.1
- 17.1
- 17.1
- 17.1
- 17.1
- 17.1
- 17.1
- 17.1
- 17.1
- 17.1
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Vendor solution
The following software releases have been updated to resolve this specific issue: 16.1R6-S2, 16.1R7, 16.2R2-S10, 17.1R3, 17.2R1, and all subsequent releases.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
No CVSS v3.0 score for this CVE.
AV:A/AC:L/Au:N/C:N/I:N/A:C
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 2, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 2, 2026 | 0.53% (0.00526) | 42.54th | v5 (v2026.06.15) |
| Sep 20, 2026 | 0.53% (0.00526) | 43.53th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.06% (0.00058) | 25.44th | v3 (v2023.03.01) |
| May 25, 2024 | 0.06% (0.00058) | 24.68th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.06% (0.00058) | 22.67th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Jan 6, 2022 | 2.28% (0.02283) | 51.78th | v1 |
| Jan 5, 2022 | 0.52% (0.00518) | 31.20th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.52% (0.00518) | 0.00th | v1 |
No CWE recorded.
References (1)
- https://kb.juniper.net/JSA10966 x_refsource_CONFIRMVendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://kb.juniper.net/JSA10966 | x_refsource_CONFIRMVendor Advisory |
Change history (0)
No recorded changes yet.