{"uuid": "f0759d9e-7466-4621-8f50-7e6140b4bb0d", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "2a075640-a300-48a4-bb44-bc6130783b9b", "vulnerability": "CVE-2025-21641", "type": "published-proof-of-concept", "source": "https://t.me/DarkWebInformer_CVEAlerts/2324", "content": "\ud83d\udd17 DarkWebInformer.com - Cyber Threat Intelligence\n\ud83d\udccc CVE ID: CVE-2025-21641\n\ud83d\udd39 Description: In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: sysctl: blackhole timeout: avoid using current->nsproxy\n\nAs mentioned in the previous commit, using the 'net' structure via\n'current' is not recommended for different reasons:\n\n- Inconsistency: getting info from the reader's/writer's netns vs only\n  from the opener's netns.\n\n- current->nsproxy can be NULL in some cases, resulting in an 'Oops'\n  (null-ptr-deref), e.g. when the current task is exiting, as spotted by\n  syzbot [1] using acct(2).\n\nThe 'pernet' structure can be obtained from the table->data using\ncontainer_of().\n\ud83d\udccf Published: 2025-01-19T10:17:58.351Z\n\ud83d\udccf Modified: 2025-01-19T10:17:58.351Z\n\ud83d\udd17 References:\n1. https://git.kernel.org/stable/c/4c74fbdc5ab95b13945be01e6065940b68222db7\n2. https://git.kernel.org/stable/c/92cf7a51bdae24a32c592adcdd59a773ae149289", "creation_timestamp": "2025-01-19T10:58:28.000000Z"}