CVE-2026-31738
Last modified
CVE-2026-31738 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. In the Linux kernel, the following vulnerability has been resolved: vxlan: validate ND option lengths in vxlan_na_create vxlan_na_create() walks ND options according to option-provided lengths. A malformed option can make the parser advance beyond the computed option span or use a too-short source LLADDR option payload. Validate option lengths against the remaining NS option area before advancing, and only read source LLADDR when the option is large enough for an Ethernet address.. EPSS estimates a 0.12% chance of exploitation in the next 30 days.
Description
In the Linux kernel, the following vulnerability has been resolved: vxlan: validate ND option lengths in vxlan_na_create vxlan_na_create() walks ND options according to option-provided lengths. A malformed option can make the parser advance beyond the computed option span or use a too-short source LLADDR option payload. Validate option lengths against the remaining NS option area before advancing, and only read source LLADDR when the option is large enough for an Ethernet address.
Metrics
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Linux | Linux Kernel | >= 3.12.18, < 3.13 | — |
| Linux | Linux Kernel | >= 3.13.10, < 3.14 | — |
| Linux | Linux Kernel | >= 3.14.1, < 5.10.253 | — |
| Linux | Linux Kernel | >= 5.11, < 5.15.203 | — |
| Linux | Linux Kernel | >= 5.16, < 6.1.168 | — |
| Linux | Linux Kernel | >= 6.2, < 6.6.134 | — |
| Linux | Linux Kernel | >= 6.7, < 6.12.81 | — |
| Linux | Linux Kernel | >= 6.13, < 6.18.22 | — |
| Linux | Linux Kernel | >= 6.19, < 6.19.12 | — |
| Linux | Linux Kernel | 3.14 | — |
| Linux | Linux Kernel | 7.0 | Rc1 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-31738?
How severe is CVE-2026-31738?
How do I fix CVE-2026-31738?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-31732In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-31733In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-31734In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-31735In the Linux kernel, the following vulnerability has been re…8.8
- CVE-2026-31736In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-31737In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-31739In the Linux kernel, the following vulnerability has been re…8.8
- CVE-2026-31740In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-31741In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2026-31742In the Linux kernel, the following vulnerability has been re…7.8
- CVE-2026-31743In the Linux kernel, the following vulnerability has been re…7.8
- CVE-2026-31744In the Linux kernel, the following vulnerability has been re…5.5
Are you affected by CVE-2026-31738?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST