CVE-2025-39702: ipv6: sr: Fix MAC comparison to be constant-time
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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.113-1Fixed in 7.2.12-1Fixed in 7.2.13-1
Event History
Frequently Asked Questions
What is the severity of CVE-2025-39702?
CVE-2025-39702 has a moderate severity rating due to its potential for timing attacks.
How do I fix CVE-2025-39702?
To fix CVE-2025-39702, update your Linux kernel to the latest patched version that addresses this vulnerability.
What systems are affected by CVE-2025-39702?
CVE-2025-39702 affects all versions of the Linux kernel that are vulnerable to improper MAC comparisons.
Is CVE-2025-39702 a critical vulnerability?
No, CVE-2025-39702 is not classified as a critical vulnerability but should still be addressed promptly.
Can CVE-2025-39702 lead to data exposure?
Yes, CVE-2025-39702 could potentially expose sensitive data through timing attacks if not mitigated.