CVE-2024-26892

CVE Details

Release Date:

2024-04-17

Description

In the Linux kernel, the following vulnerability has been resolved:\nwifi: mt76: mt7921e: fix use-after-free in free_irq()\nFrom commit a304e1b82808 ('[PATCH] Debug shared irqs'), there is a test\nto make sure the shared irq handler should be able to handle the unexpected\nevent after deregistration. For this case, let's apply MT76_REMOVED flag to\nindicate the device was removed and do not run into the resource access\nanymore.\nBUG: KASAN: use-after-free in mt7921_irq_handler+0xd8/0x100 [mt7921e]\nRead of size 8 at addr ffff88824a7d3b78 by task rmmod/11115\nCPU: 28 PID: 11115 Comm: rmmod Tainted: G W L 5.17.0 #10\nHardware name: Micro-Star International Co., Ltd. MS-7D73/MPG B650I\nEDGE WIFI (MS-7D73), BIOS 1.81 01/05/2024\nCall Trace:\n\ndump_stack_lvl+0x6f/0xa0\nprint_address_description.constprop.0+0x1f/0x190\n? mt7921_irq_handler+0xd8/0x100 [mt7921e]\n? mt7921_irq_handler+0xd8/0x100 [mt7921e]\nkasan_report.cold+0x7f/0x11b\n? mt7921_irq_handler+0xd8/0x100 [mt7921e]\nmt7921_irq_handler+0xd8/0x100 [mt7921e]\nfree_irq+0x627/0xaa0\ndevm_free_irq+0x94/0xd0\n? devm_request_any_context_irq+0x160/0x160\n? kobject_put+0x18d/0x4a0\nmt7921_pci_remove+0x153/0x190 [mt7921e]\npci_device_remove+0xa2/0x1d0\n__device_release_driver+0x346/0x6e0\ndriver_detach+0x1ef/0x2c0\nbus_remove_driver+0xe7/0x2d0\n? __check_object_size+0x57/0x310\npci_unregister_driver+0x26/0x250\n__do_sys_delete_module+0x307/0x510\n? free_module+0x6a0/0x6a0\n? fpregs_assert_state_consistent+0x4b/0xb0\n? rcu_read_lock_sched_held+0x10/0x70\n? syscall_enter_from_user_mode+0x20/0x70\n? trace_hardirqs_on+0x1c/0x130\ndo_syscall_64+0x5c/0x80\n? trace_hardirqs_on_prepare+0x72/0x160\n? do_syscall_64+0x68/0x80\n? trace_hardirqs_on_prepare+0x72/0x160\nentry_SYSCALL_64_after_hwframe+0x44/0xae

See more information about CVE-2024-26892 from MITRE CVE dictionary and NIST NVD

CVSS Scoring

NOTE: The following CVSS v3.1 metrics and score provided are preliminary and subject to review.

Base Score:	4.4	CVSS Vector:	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Attack Vector:	Local network	Attack Complexity:	Low
Privileges Required:	High	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	None	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 8 (kernel)	ELSA-2024-3618	2024-06-05
Oracle Linux version 9 (kernel)	ELSA-2024-9315	2024-11-14