Huawei EulerOS: CVE-2024-47748: kernel security update

Huawei EulerOS: CVE-2024-47748: kernel security update

Severity

4

CVSS

(AV:L/AC:M/Au:N/C:P/I:P/A:P)

Published

10/21/2024

Created

02/12/2025

Added

02/11/2025

Modified

02/11/2025

Description

In the Linux kernel, the following vulnerability has been resolved: vhost_vdpa: assign irq bypass producer token correctly We used to call irq_bypass_unregister_producer() in vhost_vdpa_setup_vq_irq() which is problematic as we don't know if the token pointer is still valid or not. Actually, we use the eventfd_ctx as the token so the life cycle of the token should be bound to the VHOST_SET_VRING_CALL instead of vhost_vdpa_setup_vq_irq() which could be called by set_status(). Fixing this by setting up irq bypass producer's token when handling VHOST_SET_VRING_CALL and un-registering the producer before calling vhost_vring_ioctl() to prevent a possible use after free as eventfd could have been released in vhost_vring_ioctl(). And such registering and unregistering will only be done if DRIVER_OK is set.

Solution(s)

• huawei-euleros-2_0_sp12-upgrade-bpftool
• huawei-euleros-2_0_sp12-upgrade-kernel
• huawei-euleros-2_0_sp12-upgrade-kernel-abi-stablelists
• huawei-euleros-2_0_sp12-upgrade-kernel-tools
• huawei-euleros-2_0_sp12-upgrade-kernel-tools-libs
• huawei-euleros-2_0_sp12-upgrade-python3-perf

References

• https://attackerkb.com/topics/cve-2024-47748
• CVE - 2024-47748
• EulerOS-SA-2025-1192