CVE-2021-47520
- Source
- https://cve.org/CVERecord?id=CVE-2021-47520
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47520.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-47520
- Downstream
- Related
- Published
- 2024-05-24T15:15:14.003Z
- Modified
- 2026-03-15T22:00:21.204531Z
- Severity
-
- 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
can: pchcan: pchcanrxnormal: fix use after free
After calling netifreceiveskb(skb), dereferencing skb is unsafe. Especially, the canframe cf which aliases skb memory is dereferenced just after the call netifreceive_skb(skb).
Reordering the lines solves the issue.
- References
-
- https://git.kernel.org/stable/c/6c73fc931658d8cbc8a1714b326cb31eb71d16a7
- https://git.kernel.org/stable/c/703dde112021c93d6e89443c070e7dbd4dea612e
- https://git.kernel.org/stable/c/94cddf1e9227a171b27292509d59691819c458db
- https://git.kernel.org/stable/c/abb4eff3dcd2e583060082a18a8dbf31f02689d4
- https://git.kernel.org/stable/c/affbad02bf80380a7403885b9fe4a1587d1bb4f3
- https://git.kernel.org/stable/c/bafe343a885c70dddf358379cf0b2a1c07355d8d
- https://git.kernel.org/stable/c/3a3c46e2eff0577454860a203be1a8295f4acb76
- https://git.kernel.org/stable/c/3e193ef4e0a3f5bf92ede83ef214cb09d01b00aa
Affected packages
Git /
Database specific
unresolved_ranges
[
{
"events": [
{
"introduced": "2.6.37"
},
{
"fixed": "4.4.295"
}
]
},
{
"events": [
{
"introduced": "4.5"
},
{
"fixed": "4.9.293"
}
]
},
{
"events": [
{
"introduced": "4.10"
},
{
"fixed": "4.14.258"
}
]
},
{
"events": [
{
"introduced": "4.15"
},
{
"fixed": "4.19.221"
}
]
},
{
"events": [
{
"introduced": "4.20"
},
{
"fixed": "5.4.165"
}
]
},
{
"events": [
{
"introduced": "5.5"
},
{
"fixed": "5.10.85"
}
]
},
{
"events": [
{
"introduced": "5.11"
},
{
"fixed": "5.15.8"
}
]
}
]
source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47520.json"