CVE-2022-49625

Name of the Vulnerable Software and Affected Versions Linux kernel versions prior to 5.14.0-119.el9.x86 64

Description A kernel panic can occur in the Linux kernel when creating Virtual Functions (VFs) due to a bug in the efx ef10 try update nic stats vf function. This happens when releasing a DMA coherent buffer and unmapping memory with vunmap in an IRQ context or with BH disabled, causing a crash. The issue is triggered by the BUG ON(in interrupt()) line in vunmap. Log messages indicate a kernel BUG at mm/vmalloc.c:2727 with an invalid opcode.

Recommendations For Linux kernel version 5.14.0-119.el9.x86 64 and earlier, apply the patch that reenables BH to release the buffer, fixing the kernel panic issue when creating VFs.