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CVE-2021-47520 Spoofing

Routine
Remediate Within 6 Months

CVE Information

Original CVE data

Published:
Updated:

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.

CWE: CWE-416
CVSS v2-
CVSS v37.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
References
https://git.kernel.org/stable/c/bafe343a885c70dddf358379cf0b2a1c07355d8d
https://git.kernel.org/stable/c/3a3c46e2eff0577454860a203be1a8295f4acb76
https://git.kernel.org/stable/c/affbad02bf80380a7403885b9fe4a1587d1bb4f3
https://git.kernel.org/stable/c/3e193ef4e0a3f5bf92ede83ef214cb09d01b00aa
https://git.kernel.org/stable/c/abb4eff3dcd2e583060082a18a8dbf31f02689d4
https://git.kernel.org/stable/c/703dde112021c93d6e89443c070e7dbd4dea612e
https://git.kernel.org/stable/c/6c73fc931658d8cbc8a1714b326cb31eb71d16a7
https://git.kernel.org/stable/c/94cddf1e9227a171b27292509d59691819c458db
Affected Vendors

Linux - (1)

Basic Analysis

Common vulnerability metrics

Vulnerabilty type as detected by PRIOnengine

Spoofing

CVSS Scores as calculated by PRIOnengine
CVSS v24.9
AV:L/AC:L/AU:N/C:N/I:N/A:C
CVSS v37.8
AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
MITRE CWE Top 25

Vulnerability weakness type is in the top 25 CWEs according to MITRE. View Mitre Top 25 CWEs

Exploits

No exploit code is reported to exist.

Active Exploitation

Vulnerability is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. See the KEV Catalog

Social Network Activity

-

Threat Actor Activity

No sightings of the vulnerability within threat reports.

Cybersecurity Frameworks

How the vulnerability maps against various cybersecurity frameworks

-

Compliance Impact

How the submited vulnerability affects compliance

PCI DSS v3.2.1-6.5.2 - Buffer Overflows

Web Application Security Frameworks

Applicable if the issue likely affects a web application

-