7.8

CVE-2021-47278

bus: mhi: pci_generic: Fix possible use-after-free in mhi_pci_remove()

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

bus: mhi: pci_generic: Fix possible use-after-free in mhi_pci_remove()

This driver's remove path calls del_timer(). However, that function
does not wait until the timer handler finishes. This means that the
timer handler may still be running after the driver's remove function
has finished, which would result in a use-after-free.

Fix by calling del_timer_sync(), which makes sure the timer handler
has finished, and unable to re-schedule itself.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.12 < 5.12.11
Linux ≫ Linux Kernel Version 5.13 Update rc1
Linux ≫ Linux Kernel Version 5.13 Update rc2
Linux ≫ Linux Kernel Version 5.13 Update rc3
Linux ≫ Linux Kernel Version 5.13 Update rc4
Linux ≫ Linux Kernel Version 5.13 Update rc5
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.22% 0.122
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://git.kernel.org/stable/c/0b67808ade8893a1b3608ddd74fac7854786c919
Patch
https://git.kernel.org/stable/c/c597d5c59c7a6417dba06590f59b922e01188e8d
Patch