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Vulnerability Change Records for CVE-2024-46762

Change History

New CVE Received by NIST 9/18/2024 4:15:04 AM

Action Type Old Value New Value
Added Description

								
							
							
						
In the Linux kernel, the following vulnerability has been resolved:

xen: privcmd: Fix possible access to a freed kirqfd instance

Nothing prevents simultaneous ioctl calls to privcmd_irqfd_assign() and
privcmd_irqfd_deassign(). If that happens, it is possible that a kirqfd
created and added to the irqfds_list by privcmd_irqfd_assign() may get
removed by another thread executing privcmd_irqfd_deassign(), while the
former is still using it after dropping the locks.

This can lead to a situation where an already freed kirqfd instance may
be accessed and cause kernel oops.

Use SRCU locking to prevent the same, as is done for the KVM
implementation for irqfds.
Added Reference

								
							
							
						
kernel.org https://git.kernel.org/stable/c/112fd2f02b308564724b8e81006c254d20945c4b [No types assigned]
Added Reference

								
							
							
						
kernel.org https://git.kernel.org/stable/c/611ff1b1ae989a7bcce3e2a8e132ee30e968c557 [No types assigned]
Added Reference

								
							
							
						
kernel.org https://git.kernel.org/stable/c/e997b357b13a7d95de31681fc54fcc34235fa527 [No types assigned]