CVE-2024-26892
wifi: mt76: mt7921e: fix use-after-free in free_irq()
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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
En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: wifi: mt76: mt7921e: fix use-after-free en free_irq() Desde el commit a304e1b82808 ("[PATCH] Depurar irqs compartidas"), existe una prueba para asegurarse de que El controlador de irq compartido debería poder manejar el evento inesperado después de la cancelación del registro. Para este caso, apliquemos el indicador MT76_REMOVED para indicar que el dispositivo fue eliminado y no volver a acceder al recurso. ERROR: KASAN: use-after-free en mt7921_irq_handler+0xd8/0x100 [mt7921e] Lectura de tamaño 8 en la dirección ffff88824a7d3b78 por tarea rmmod/11115 CPU: 28 PID: 11115 Comm: rmmod Tainted: GWL 5.17.0 #10 Nombre de hardware: Micro-Star International Co., Ltd. MS-7D73/MPG B650I EDGE WIFI (MS-7D73), BIOS 1.81 05/01/2024 Seguimiento de llamadas: 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+0xe7/0x2d 0 ? __check_object_size+0x57/0x310 pci_unregister_driver+0x26/0x250 __do_sys_delete_module+0x307/0x510 ? módulo_libre+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 entrada_SYSCALL_64_after_hwframe+0x44/0xae
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-02-19 CVE Reserved
- 2024-04-17 CVE Published
- 2024-04-18 EPSS Updated
- 2024-09-11 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-416: Use After Free
CAPEC
References (9)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/9270270d62191b7549296721e8d5f3dc0df01563 | Vuln. Introduced | |
| https://git.kernel.org/stable/c/a76eaaaafd8b408238d7865bbbbd311f08988f3d | Vuln. Introduced | |
| https://git.kernel.org/stable/c/95e41ac30a0d0b3637f0b3c93235a7a107a2fb7f | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2024-26892 | 2024-06-05 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2275666 | 2024-06-05 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.4 < 6.6.23 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.4 < 6.6.23" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.4 < 6.7.11 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.4 < 6.7.11" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.4 < 6.8.2 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.4 < 6.8.2" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 6.4 < 6.9 Search vendor "Linux" for product "Linux Kernel" and version " >= 6.4 < 6.9" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 6.2.15 Search vendor "Linux" for product "Linux Kernel" and version "6.2.15" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | 6.3.2 Search vendor "Linux" for product "Linux Kernel" and version "6.3.2" | en |
Affected
| ||||||