xfrm: fix slab-use-after-free in decode_session6

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

CVE-2023-53500 · Microsoft / collected KEV context

cve-program · CVE-2023-53500

• https://git.kernel.org/stable/c/da4cbaa75ed088b6d70db77b9103a27e2359e243
• https://git.kernel.org/stable/c/db0e50741f0387f388e9ec824ea7ae8456554d5b
• https://git.kernel.org/stable/c/bafa236380816b41b2c4c6970d9067fefa4a6c9e
• https://git.kernel.org/stable/c/44b3d40967009304617a7a6486490c1d6c12f899
• https://git.kernel.org/stable/c/0d27567fde5be5f0edc2db5c110142b7915b8fa8
• https://git.kernel.org/stable/c/86f15300a22656db3fa8c8967defbcd24fac4d37
• https://git.kernel.org/stable/c/53223f2ed1ef5c90dad814daaaefea4e68a933c8

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