CVE-2025-39783

/// Technical description

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

PCI: endpoint: Fix configfs group list head handling

Doing a list_del() on the epf_group field of struct pci_epf_driver in

pci_epf_remove_cfs() is not correct as this field is a list head, not

a list entry. This list_del() call triggers a KASAN warning when an

endpoint function driver which has a configfs attribute group is torn

down:

==================================================================

BUG: KASAN: slab-use-after-free in pci_epf_remove_cfs+0x17c/0x198

Write of size 8 at addr ffff00010f4a0d80 by task rmmod/319

CPU: 3 UID: 0 PID: 319 Comm: rmmod Not tainted 6.16.0-rc2 #1 NONE

Hardware name: Radxa ROCK 5B (DT)

Call trace:

show_stack+0x2c/0x84 (C)

dump_stack_lvl+0x70/0x98

print_report+0x17c/0x538

kasan_report+0xb8/0x190

__asan_report_store8_noabort+0x20/0x2c

pci_epf_remove_cfs+0x17c/0x198

pci_epf_unregister_driver+0x18/0x30

nvmet_pci_epf_cleanup_module+0x24/0x30 [nvmet_pci_epf]

__arm64_sys_delete_module+0

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References