8.4

CVE-2021-47456

can: peak_pci: peak_pci_remove(): fix UAF

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

can: peak_pci: peak_pci_remove(): fix UAF

When remove the module peek_pci, referencing 'chan' again after
releasing 'dev' will cause UAF.

Fix this by releasing 'dev' later.

The following log reveals it:

[   35.961814 ] BUG: KASAN: use-after-free in peak_pci_remove+0x16f/0x270 [peak_pci]
[   35.963414 ] Read of size 8 at addr ffff888136998ee8 by task modprobe/5537
[   35.965513 ] Call Trace:
[   35.965718 ]  dump_stack_lvl+0xa8/0xd1
[   35.966028 ]  print_address_description+0x87/0x3b0
[   35.966420 ]  kasan_report+0x172/0x1c0
[   35.966725 ]  ? peak_pci_remove+0x16f/0x270 [peak_pci]
[   35.967137 ]  ? trace_irq_enable_rcuidle+0x10/0x170
[   35.967529 ]  ? peak_pci_remove+0x16f/0x270 [peak_pci]
[   35.967945 ]  __asan_report_load8_noabort+0x14/0x20
[   35.968346 ]  peak_pci_remove+0x16f/0x270 [peak_pci]
[   35.968752 ]  pci_device_remove+0xa9/0x250
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 3.4 < 4.4.290
Linux ≫ Linux Kernel Version >= 4.5 < 4.9.288
Linux ≫ Linux Kernel Version >= 4.10 < 4.14.253
Linux ≫ Linux Kernel Version >= 4.15 < 4.19.214
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.156
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.76
Linux ≫ Linux Kernel Version >= 5.11 < 5.14.15
Linux ≫ Linux Kernel Version5.15 Updaterc1
Linux ≫ Linux Kernel Version5.15 Updaterc2
Linux ≫ Linux Kernel Version5.15 Updaterc3
Linux ≫ Linux Kernel Version5.15 Updaterc4
Linux ≫ Linux Kernel Version5.15 Updaterc5
Linux ≫ Linux Kernel Version5.15 Updaterc6
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.24% 0.143
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
134c704f-9b21-4f2e-91b3-4a467353bcc0 8.4 2.5 5.9
CVSS:3.1/AV:L/AC:L/PR:N/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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

CWE-467 Use of sizeof() on a Pointer Type

The code calls sizeof() on a pointer type, which can be an incorrect calculation if the programmer intended to determine the size of the data that is being pointed to.

https://git.kernel.org/stable/c/0e5afdc2315b0737edcf55bede4ee1640d2d464d
Patch
https://git.kernel.org/stable/c/1248582e47a9f7ce0ecd156c39fc61f8b6aa3699
Patch
https://git.kernel.org/stable/c/1c616528ba4aeb1125a06b407572ab7b56acae38
Patch
https://git.kernel.org/stable/c/28f28e4bc3a5e0051faa963f10b778ab38c1db69
Patch
https://git.kernel.org/stable/c/34914971bb3244db4ce2be44e9438a9b30c56250
Patch
https://git.kernel.org/stable/c/447d44cd2f67a20b596ede3ca3cd67086dfd9ca9
Patch
https://git.kernel.org/stable/c/949fe9b35570361bc6ee2652f89a0561b26eec98
Patch
https://git.kernel.org/stable/c/adbda14730aacce41c0d3596415aa39ad63eafd9
Patch