CVE-2021-47456

  1. OpenCVE
  2. Vulnerabilities (CVE)
  3. CVE-2021-47456
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

8.4 /10

CVSS v3 : HIGH

V3 Legend

Vector :

Exploitability : 2.5 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References
Link Resource
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
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
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc6:*:*:*:*:*:*
History

02 Apr 2025, 15:11

Type Values Removed Values Added
First Time Linux linux Kernel
Linux
References () https://git.kernel.org/stable/c/0e5afdc2315b0737edcf55bede4ee1640d2d464d - () https://git.kernel.org/stable/c/0e5afdc2315b0737edcf55bede4ee1640d2d464d - Patch
References () https://git.kernel.org/stable/c/1248582e47a9f7ce0ecd156c39fc61f8b6aa3699 - () https://git.kernel.org/stable/c/1248582e47a9f7ce0ecd156c39fc61f8b6aa3699 - Patch
References () https://git.kernel.org/stable/c/1c616528ba4aeb1125a06b407572ab7b56acae38 - () https://git.kernel.org/stable/c/1c616528ba4aeb1125a06b407572ab7b56acae38 - Patch
References () https://git.kernel.org/stable/c/28f28e4bc3a5e0051faa963f10b778ab38c1db69 - () https://git.kernel.org/stable/c/28f28e4bc3a5e0051faa963f10b778ab38c1db69 - Patch
References () https://git.kernel.org/stable/c/34914971bb3244db4ce2be44e9438a9b30c56250 - () https://git.kernel.org/stable/c/34914971bb3244db4ce2be44e9438a9b30c56250 - Patch
References () https://git.kernel.org/stable/c/447d44cd2f67a20b596ede3ca3cd67086dfd9ca9 - () https://git.kernel.org/stable/c/447d44cd2f67a20b596ede3ca3cd67086dfd9ca9 - Patch
References () https://git.kernel.org/stable/c/949fe9b35570361bc6ee2652f89a0561b26eec98 - () https://git.kernel.org/stable/c/949fe9b35570361bc6ee2652f89a0561b26eec98 - Patch
References () https://git.kernel.org/stable/c/adbda14730aacce41c0d3596415aa39ad63eafd9 - () https://git.kernel.org/stable/c/adbda14730aacce41c0d3596415aa39ad63eafd9 - Patch
CPE cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*
Information

Published : 2024-05-22 07:15

Updated : 2025-04-02 15:11

NVD link : CVE-2021-47456

Mitre link : CVE-2021-47456

CVE.ORG link : CVE-2021-47456

JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-416

Use After Free

CWE-467

Use of sizeof() on a Pointer Type