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

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00021.

Exploitation none

Automatable no

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd affected < 1c616528ba4aeb1125a06b407572ab7b56acae38
e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd affected < 447d44cd2f67a20b596ede3ca3cd67086dfd9ca9
e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd affected < 34914971bb3244db4ce2be44e9438a9b30c56250
e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd affected < adbda14730aacce41c0d3596415aa39ad63eafd9
e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd affected < 1248582e47a9f7ce0ecd156c39fc61f8b6aa3699
e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd affected < 28f28e4bc3a5e0051faa963f10b778ab38c1db69
e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd affected < 0e5afdc2315b0737edcf55bede4ee1640d2d464d
e6d9c80b7ca1504411ad6d7acdb8683e4ae1c9cd affected < 949fe9b35570361bc6ee2652f89a0561b26eec98
Linux Linux affected
Version Status Constraints
3.4 affected —
0 unaffected < 3.4
4.4.290 unaffected ≤ 4.4.*
4.9.288 unaffected ≤ 4.9.*
4.14.253 unaffected ≤ 4.14.*
4.19.214 unaffected ≤ 4.19.*
5.4.156 unaffected ≤ 5.4.*
5.10.76 unaffected ≤ 5.10.*
5.14.15 unaffected ≤ 5.14.*
5.15 unaffected ≤ *

Configuration 1 [-]

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:*:*:*:*:*:*
Package CPE Advisory Released Date
Red Hat Enterprise Linux 8
kernel-rt-0:4.18.0-553.8.1.rt7.349.el8_10 cpe:/a:redhat:enterprise_linux:8::nfv RHSA-2024:4352 2024-07-08T00:00:00Z
kernel-0:4.18.0-553.8.1.el8_10 cpe:/o:redhat:enterprise_linux:8 RHSA-2024:4211 2024-07-02T00:00:00Z

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/0e5afdc2315b0737edcf55bede4ee1640d2d464d cve-icon cve-icon
https://git.kernel.org/stable/c/1248582e47a9f7ce0ecd156c39fc61f8b6aa3699 cve-icon cve-icon
https://git.kernel.org/stable/c/1c616528ba4aeb1125a06b407572ab7b56acae38 cve-icon cve-icon
https://git.kernel.org/stable/c/28f28e4bc3a5e0051faa963f10b778ab38c1db69 cve-icon cve-icon
https://git.kernel.org/stable/c/34914971bb3244db4ce2be44e9438a9b30c56250 cve-icon cve-icon
https://git.kernel.org/stable/c/447d44cd2f67a20b596ede3ca3cd67086dfd9ca9 cve-icon cve-icon
https://git.kernel.org/stable/c/949fe9b35570361bc6ee2652f89a0561b26eec98 cve-icon cve-icon
https://git.kernel.org/stable/c/adbda14730aacce41c0d3596415aa39ad63eafd9 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2024052244-CVE-2021-47456-dc47@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2021-47456 cve-icon
https://www.cve.org/CVERecord?id=CVE-2021-47456 cve-icon
History

Wed, 02 Apr 2025 15:30:00 +0000

Type Values Removed Values Added
CPEs 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:*:*:*:*:*:*

Mon, 04 Nov 2024 12:15:00 +0000

Type Values Removed Values Added
First Time appeared Linux
Linux linux Kernel
CPEs cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
Vendors & Products Linux
Linux linux Kernel
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-05-04T07:11:19.120Z

Reserved: 2024-05-21T14:58:30.833Z

Link: CVE-2021-47456

cve-icon Vulnrichment

Updated: 2024-08-04T05:39:59.411Z

cve-icon NVD

Status : Analyzed

Published: 2024-05-22T07:15:10.627

Modified: 2025-04-02T15:11:57.403

Link: CVE-2021-47456

cve-icon Redhat

Severity : Low

Publid Date: 2024-05-22T00:00:00Z

Links: CVE-2021-47456 - Bugzilla

cve-icon OpenCVE Enrichment

No data.

Weaknesses