🛡️ CVE-2024-26892 — kernel

🟠 CVSS 7.8 — High ✅ No Known Exploit NVD
7.8
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

wifi: mt76: mt7921e: fix use-after-free in free_irq()

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

wifi: mt76: mt7921e: fix use-after-free in free_irq()

From commit a304e1b82808 ("[PATCH] Debug shared irqs"), there is a test

to make sure the shared irq handler should be able to handle the unexpected

event after deregistration. For this case, let's apply MT76_REMOVED flag to

indicate the device was removed and do not run into the resource access

anymore.

BUG: KASAN: use-after-free in mt7921_irq_handler+0xd8/0x100 [mt7921e]

Read of size 8 at addr ffff88824a7d3b78 by task rmmod/11115

CPU: 28 PID: 11115 Comm: rmmod Tainted: G W L 5.17.0 #10

Hardware name: Micro-Star International Co., Ltd. MS-7D73/MPG B650I

EDGE WIFI (MS-7D73), BIOS 1.81 01/05/2024

Call Trace:

<TASK>

dump_stack_lvl+0x6f/0xa0

print_address_description.constprop.0+0x1f/0x190

? mt7921_irq_handler+0xd8/0x100 [mt7921e]

? mt7921_irq_handler+0xd8/0x100 [mt7921e]

kasan_report.cold+0x7f/0x11b

? mt7921_irq_handler+0xd8/0x100 [mt7921e]

mt7921_irq_handler+0xd8/0x100 [mt7921e]

free_irq+0x627/0xaa0

devm_free_irq+0x94/0xd0

? devm_request_any_context_irq+0x160/0x160

? kobject_put+0x18d/0x4a0

mt7921_pci_remove+0x153/0x190 [mt7921e]

pci_device_remove+0xa2/0x1d0

__device_release_driver+0x346/0x6e0

driver_detach+0x1ef/0x2c0

bus_remove_driver+0xe7/0x2d0

? __check_object_size+0x57/0x310

pci_unregister_driver+0x26/0x250

__do_sys_delete_module+0x307/0x510

? free_module+0x6a0/0x6a0

? fpregs_assert_state_consistent+0x4b/0xb0

? rcu_read_lock_sched_held+0x10/0x70

? syscall_enter_from_user_mode+0x20/0x70

? trace_hardirqs_on+0x1c/0x130

do_syscall_64+0x5c/0x80

? trace_hardirqs_on_prepare+0x72/0x160

? do_syscall_64+0x68/0x80

? trace_hardirqs_on_prepare+0x72/0x160

entry_SYSCALL_64_after_hwframe+0x44/0xae

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

Affected software

CVE-2024-26892 is recorded against 2 packages.

  • kernel (from 6.8.0 up to 6.8.2)
  • linux-kernel (from 6.8 up to 6.8.2)

Timeline and source

Published on 17 April 2024 and last revised on 15 July 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

CVE-2024-26892 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity High
CVSS Score 7.8
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2024-04-17
Updated 2026-08-12
Modified 2026-07-15

Affected Packages

Software From version Fixed in
kernel 6.8.0 6.8.2
linux-kernel 6.8 6.8.2

Similar Threats

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