CVE-2021-47456
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-47456
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47456.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2021-47456
- Downstream
- Related
- Published
- 2024-05-22T07:15:10Z
- Modified
- 2025-08-09T20:01:27Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
can: peakpci: peakpci_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 peakpciremove+0x16f/0x270 [peakpci] [ 35.963414 ] Read of size 8 at addr ffff888136998ee8 by task modprobe/5537 [ 35.965513 ] Call Trace: [ 35.965718 ] dumpstacklvl+0xa8/0xd1 [ 35.966028 ] printaddressdescription+0x87/0x3b0 [ 35.966420 ] kasanreport+0x172/0x1c0 [ 35.966725 ] ? peakpciremove+0x16f/0x270 [peakpci] [ 35.967137 ] ? traceirqenablercuidle+0x10/0x170 [ 35.967529 ] ? peakpciremove+0x16f/0x270 [peakpci] [ 35.967945 ] _asanreportload8noabort+0x14/0x20 [ 35.968346 ] peakpciremove+0x16f/0x270 [peakpci] [ 35.968752 ] pcideviceremove+0xa9/0x250
- References
-
- https://git.kernel.org/stable/c/0e5afdc2315b0737edcf55bede4ee1640d2d464d
- https://git.kernel.org/stable/c/1248582e47a9f7ce0ecd156c39fc61f8b6aa3699
- https://git.kernel.org/stable/c/1c616528ba4aeb1125a06b407572ab7b56acae38
- https://git.kernel.org/stable/c/28f28e4bc3a5e0051faa963f10b778ab38c1db69
- https://git.kernel.org/stable/c/34914971bb3244db4ce2be44e9438a9b30c56250
- https://git.kernel.org/stable/c/447d44cd2f67a20b596ede3ca3cd67086dfd9ca9
- https://git.kernel.org/stable/c/949fe9b35570361bc6ee2652f89a0561b26eec98
- https://git.kernel.org/stable/c/adbda14730aacce41c0d3596415aa39ad63eafd9