CVE-2025-39702
HIGHCVSS 7/10EPSS 0.15%
Last modified
CVE-2025-39702 is a high-severity vulnerability rated 7/10 on the CVSS scale. In the Linux kernel, the following vulnerability has been resolved: ipv6: sr: Fix MAC comparison to be constant-time To prevent timing attacks, MACs need to be compared in constant time. Use the appropriate helper function for this.. EPSS estimates a 0.15% chance of exploitation in the next 30 days.
Description
In the Linux kernel, the following vulnerability has been resolved: ipv6: sr: Fix MAC comparison to be constant-time To prevent timing attacks, MACs need to be compared in constant time. Use the appropriate helper function for this.
Metrics
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Linux | Linux Kernel | >= 4.10, < 5.15.190 | — |
| Linux | Linux Kernel | >= 5.16, < 6.1.149 | — |
| Linux | Linux Kernel | >= 6.2, < 6.6.103 | — |
| Linux | Linux Kernel | >= 6.7, < 6.12.44 | — |
| Linux | Linux Kernel | >= 6.13, < 6.16.4 | — |
| Linux | Linux Kernel | 6.17 | Rc1 |
| Debian | Debian Linux | 11.0 | — |
References
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.htmlMailing List, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2025-39702?
In the Linux kernel, the following vulnerability has been resolved:
ipv6: sr: Fix MAC comparison to be constant-time
To prevent timing attacks, MACs need to be compared in constant time.
Use the appropriate helper function for this.
How severe is CVE-2025-39702?
CVE-2025-39702 has a CVSS score of 7/10 (HIGH severity). The EPSS model estimates a 0.15% probability of exploitation in the next 30 days.
How do I fix CVE-2025-39702?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
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 2025
- CVE-2025-39697In the Linux kernel, the following vulnerability has been re…4.7
- CVE-2025-39698In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2025-39699In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2025-3970A vulnerability classified as problematic has been found in …5.4
- CVE-2025-39700In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2025-39701In the Linux kernel, the following vulnerability has been re…7.8
- CVE-2025-39703In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2025-39704In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2025-39705In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2025-39706In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2025-39707In the Linux kernel, the following vulnerability has been re…5.5
- CVE-2025-39708In the Linux kernel, the following vulnerability has been re…5.5
Are you affected by CVE-2025-39702?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST