ipv6: fix Route Information option length validation

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

CVE-2026-74598 · Microsoft / collected KEV context

cve-program · CVE-2026-74598

• https://git.kernel.org/stable/c/2f6f94eda12430fb41b24b44a71e2ea4e93561d7
• https://git.kernel.org/stable/c/7eac87396c44a312be457ef41d4c5687883be9a2
• https://git.kernel.org/stable/c/7309529f257ae18e72112ef9f614edfd6df229bb
• https://git.kernel.org/stable/c/0b9e02f3bd31c888f2ccdc0ca08e546d6abe9c4d
• https://git.kernel.org/stable/c/ff3cb05289b8a4ef95fa7ea14c7d34818359edbb
• https://git.kernel.org/stable/c/3b2231e358d26e3aec5d8040b1fb777af03c5f05
• https://git.kernel.org/stable/c/da64ed1f346ba84df574d6469fa2e422b2511719
• https://git.kernel.org/stable/c/d1ad8fb2ac6a1afb71dc22d9ae8efb4dda96c824

No related operational record is retained in the current change model.