GoogleOSV:CVE-2021-47520CVE-2021-47520
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
Low
In the Linux kernel, the following vulnerability has been resolved: can: pch_can: pch_can_rx_normal: fix use after free After calling netif_receive_skb(skb), dereferencing skb is unsafe. Especially, the can_frame cf which aliases skb memory is dereferenced just after the call netif_receive_skb(skb). Reordering the lines solves the issue.
References
git.kernel.org/linus/94cddf1e9227a171b27292509d59691819c458db
git.kernel.org/stable/c/3a3c46e2eff0577454860a203be1a8295f4acb76
git.kernel.org/stable/c/3e193ef4e0a3f5bf92ede83ef214cb09d01b00aa
git.kernel.org/stable/c/6c73fc931658d8cbc8a1714b326cb31eb71d16a7
git.kernel.org/stable/c/703dde112021c93d6e89443c070e7dbd4dea612e
git.kernel.org/stable/c/94cddf1e9227a171b27292509d59691819c458db
git.kernel.org/stable/c/abb4eff3dcd2e583060082a18a8dbf31f02689d4
git.kernel.org/stable/c/affbad02bf80380a7403885b9fe4a1587d1bb4f3
git.kernel.org/stable/c/bafe343a885c70dddf358379cf0b2a1c07355d8d
ubuntu.com/security/CVE-2021-47520
www.cve.org/CVERecord?id=CVE-2021-47520
Related
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
Low