libceph: Fix potential null-ptr-deref in decode_choose_args()

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

CVE-2026-52957 · Microsoft / collected KEV context

cve-program · CVE-2026-52957

• https://git.kernel.org/stable/c/d55ffad8d422b5d1cc44dad32bd3d25f4471cd9f
• https://git.kernel.org/stable/c/301286c0ccd37d66b0e40786fd35a4f19cdbd88a
• https://git.kernel.org/stable/c/7169f326a23d0f547fcd90e68b72fd387622e126
• https://git.kernel.org/stable/c/d7a65a34d2453f8cd3e0cc0e1319740af7e24276
• https://git.kernel.org/stable/c/312ec973efac0efb9b9ed64214235910e9ecbaa8
• https://git.kernel.org/stable/c/f2f95e6d4b97e70bb876139b0583fc8079983f85
• https://git.kernel.org/stable/c/a20e16ebfe2fa65348eb4b2dc7deac330ce03e9c
• https://git.kernel.org/stable/c/28b0a2ab8c82d0bbdeb8013029c67c978ce6e4bf

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