发布于3月6日3月6日 Members Red Hat: CVE-2024-35880: kernel: io_uring/kbuf: hold io_buffer_list reference over mmap (Multiple Advisories) Severity 5 CVSS (AV:L/AC:L/Au:S/C:N/I:N/A:C) Published 05/19/2024 Created 12/06/2024 Added 12/05/2024 Modified 12/05/2024 Description In the Linux kernel, the following vulnerability has been resolved: io_uring/kbuf: hold io_buffer_list reference over mmap If we look up the kbuf, ensure that it doesn't get unregistered until after we're done with it. Since we're inside mmap, we cannot safely use the io_uring lock. Rely on the fact that we can lookup the buffer list under RCU now and grab a reference to it, preventing it from being unregistered until we're done with it. The lookup returns the io_buffer_list directly with it referenced. Solution(s) redhat-upgrade-kernel redhat-upgrade-kernel-rt References CVE-2024-35880 RHSA-2024:9315
