CVE-2026-31668
Published: Apr 24, 2026
Modified: May 11, 2026
CVSS v3.1
9.8
Description
In the Linux kernel, the following vulnerability has been resolved: seg6: separate dst_cache for input and output paths in seg6 lwtunnel The seg6 lwtunnel uses a single dst_cache per encap route, shared between seg6_input_core() and seg6_output_core(). These two paths can perform the post-encap SID lookup in different routing contexts (e.g., ip rules matching on the ingress interface, or VRF table separation). Whichever path runs first populates the cache, and the other reuses it blindly, bypassing its own lookup. Fix this by splitting the cache into cache_input and cache_output, so each path maintains its own cached dst independently.
| Vendor | Product | Versions |
|---|---|---|
Linux | Linux | affected 6c8702c60b88651072460f3f4026c7dfe2521d12 - < 1dec91d3b1cefb82635761b7812154af3ef46449affected 6c8702c60b88651072460f3f4026c7dfe2521d12 - < 750569d6987a0ff46317a4b86eb3907e296287bfaffected 6c8702c60b88651072460f3f4026c7dfe2521d12 - < 57d0374d14fa667dec6952173b93e7e84486d5c9affected 6c8702c60b88651072460f3f4026c7dfe2521d12 - < 84d458018b147176b259347103fccb7e93abd2b1affected 6c8702c60b88651072460f3f4026c7dfe2521d12 - < 6305ad032b03d2ea4181b953a66e19a9a6ed053c+3 more versions |
Linux | Linux | affected 4.10unaffected 0 - < 4.10unaffected 5.10.253 - <= 5.10.*unaffected 5.15.203 - <= 5.15.*unaffected 6.1.169 - <= 6.1.*+5 more versions |
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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