CVE-2015-3641: 
Bitcoin Core vulnerability analysis and mitigation

The vulnerability (CVE-2015-3641) affects bitcoind and Bitcoin-Qt versions prior to 0.10.2. The vulnerability allows attackers to cause a denial of service (disabled functionality such as a client application crash) via an "Easy" attack through out-of-memory conditions via peer-to-peer networking (Bitcoin Wiki).

The vulnerability is rated with a CVSS v3.1 Base Score of 7.5 HIGH (Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). The attack vector is network-based, with low attack complexity, requiring no privileges or user interaction. The scope is unchanged, with no impact on confidentiality or integrity, but high impact on availability (NVD).

When successfully exploited, the vulnerability can result in a denial of service condition, specifically causing disabled functionality such as a client application crash. The impact is primarily focused on the availability of the Bitcoin client, affecting its normal operations (NVD).

The vulnerability was fixed in Bitcoin-Qt and bitcoind version 0.10.2. Users running affected versions should upgrade to version 0.10.2 or later to mitigate the vulnerability (Bitcoin Wiki).