Merge rust-bitcoin/rust-miniscript#811: CVE-2025-43707 public disclosure

80de07ae039d9f2f64a40c1e71ee5e9bea7679b5 CHANGELOG: disclose 12.3.1 contained a silent fix for CVE-2025-43707 (Antoine Poinsot)
6f8e37cc028a39dd06205a2f6160c114060e9b28 CHANGELOG: add entry for 12.3.0 (Antoine Poinsot)

Pull request description:

  Add an entry to the CHANGELOG stating #798 was a silent fix for a crash bug which could be triggered by satisfying `thresh(k,subs)` fragments where `k == len(subs)`.

ACKs for top commit:
  apoelstra:
    ACK 80de07ae039d9f2f64a40c1e71ee5e9bea7679b5; successfully ran local tests

Tree-SHA512: 5c5fa7b5d07295a7b8fa0cbb60ab503d14d7af689132e7d7f3f56af85c92de9336b5fe7b9f7752a40b64ec846bd9005e093af7c4b8eba6be52ff6c4527b45088

Author: heap-coder

CHANGELOG.md

@@ -1,3 +1,11 @@
+# # 12.3.1 - April 1, 2025
+
+- Silent fix for CVE-2025-43707 (crash on satisfaction of particularly crafted `thresh` fragments) [#798](https://github.com/rust-bitcoin/rust-miniscript/pull/798)
+
+# # 12.3.0 - August 31, 2024
+
+- Fix incorrect string serialization of `and_b` [#735](https://github.com/rust-bitcoin/rust-miniscript/pull/735)
+
 # # 12.2.0 - July 20, 2024
 
 - Fix panics while decoding large miniscripts from script [#712](https://github.com/rust-bitcoin/rust-miniscript/pull/712)