tipc: fix double-free in tipc_buf_append()

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CVE-2026-52993 · Microsoft / collected KEV context

cve-program · CVE-2026-52993

• https://git.kernel.org/stable/c/a438975a6dcdbd70865978c021650d1485586f0b
• https://git.kernel.org/stable/c/4ee4deadaae7cb2e3d53af0fc889cf92a73413c0
• https://git.kernel.org/stable/c/d3556656c6daebf8def751c7e71d11dd0a180d24
• https://git.kernel.org/stable/c/0274f24485fc38032d4093e463dc3ff5c7a667c9
• https://git.kernel.org/stable/c/4d104882bc815d4ec666ace9155f5f52715879a6
• https://git.kernel.org/stable/c/1d5e589055880fae229e229e1929e087dbe08cf3
• https://git.kernel.org/stable/c/29940fff14110ca48c5ccc168d121665b51bb778
• https://git.kernel.org/stable/c/d293ca716e7d5dffdaecaf6b9b2f857a33dc3d3a

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