{"uuid": "eab57cb6-ac1a-474a-9f7b-9bb8a5e4502b", "vulnerability_lookup_origin": "1a89b78e-f703-45f3-bb86-59eb712668bd", "author": "9f56dd64-161d-43a6-b9c3-555944290a09", "vulnerability": "CVE-2023-1998", "type": "published-proof-of-concept", "source": "https://t.me/crackcodes/3217", "content": "Linux Kernel: Spectre v2 SMT mitigations problem ( CVE-2023-1998, PoC included )\n\nThe Linux kernel allows userspace processes to enable mitigations by calling prctl with PR_SET_SPECULATION_CTRL which disables the speculation feature as well as by using seccomp. We had noticed that on VMs of at least one major cloud provider, the kernel still left the victim process exposed to attacks in some cases even after enabling the spectre-BTI mitigation with prctl. The same beahaviour can be observed on a bare-metal machine when forcing the mitigation to IBRS on boot comand line.\n\nDownload: https://system32.ink/news-feed/p/299/", "creation_timestamp": "2023-04-13T15:42:30.000000Z"}