CVE-2024-53092: virtio_pci: Fix admin vq cleanup by using correct info pointer

First published: Thu Nov 21 2024(Updated: )

In the Linux kernel, the following vulnerability has been resolved: virtio_pci: Fix admin vq cleanup by using correct info pointer vp_modern_avq_cleanup() and vp_del_vqs() clean up admin vq resources by virtio_pci_vq_info pointer. The info pointer of admin vq is stored in vp_dev->admin_vq.info instead of vp_dev->vqs[]. Using the info pointer from vp_dev->vqs[] for admin vq causes a kernel NULL pointer dereference bug. In vp_modern_avq_cleanup() and vp_del_vqs(), get the info pointer from vp_dev->admin_vq.info for admin vq to clean up the resources. Also make info ptr as argument of vp_del_vq() to be symmetric with vp_setup_vq(). vp_reset calls vp_modern_avq_cleanup, and causes the Call Trace: ================================================================== BUG: kernel NULL pointer dereference, address:0000000000000000 ... CPU: 49 UID: 0 PID: 4439 Comm: modprobe Not tainted 6.11.0-rc5 #1 RIP: 0010:vp_reset+0x57/0x90 [virtio_pci] Call Trace: <TASK> ... ? vp_reset+0x57/0x90 [virtio_pci] ? vp_reset+0x38/0x90 [virtio_pci] virtio_reset_device+0x1d/0x30 remove_vq_common+0x1c/0x1a0 [virtio_net] virtnet_remove+0xa1/0xc0 [virtio_net] virtio_dev_remove+0x46/0xa0 ... virtio_pci_driver_exit+0x14/0x810 [virtio_pci] ==================================================================

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Never miss a vulnerability like this again

Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.

Read MoreStart Free Trial

• agent/references
• agent/weakness
• agent/title
• agent/description
• agent/type
• agent/first-publish-date
• agent/author
• agent/event
• collector/mitre-cve
• source/MITRE
• collector/nvd-api
• source/NVD
• agent/software-canonical-lookup
• agent/remedy
• agent/last-modified-date
• agent/severity
• agent/tags
• agent/softwarecombine
• vendor/linux
• canonical/linux linux kernel
• version/linux linux kernel/6.11
• version/linux linux kernel/6.12-rc1
• version/linux linux kernel/6.12-rc2
• version/linux linux kernel/6.12-rc3
• version/linux linux kernel/6.12-rc4
• version/linux linux kernel/6.12-rc5
• version/linux linux kernel/6.12-rc6
• version/linux linux kernel/6.12-rc7