CVE-2021-47668

highpriority · track · 0EPSS 0.002 · 14 %ileDEEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.24% (14th) EPSS

CVSS 8.8 · high

Is it mine?

93 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · cert_bund

EPSS · scored 2026-10-27

In the Linux kernel, the following vulnerability has been resolved: can: dev: can_restart: fix use after free bug After calling netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the can_frame cf which aliases skb memory is accessed after the netif_rx_ni() in: stats->rx_bytes += cf->len; Reordering the lines solves the issue.

cvss

Technical severity, 0–10. One row per scoring source.

8.8

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.18.8highCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondary · ENISA EU

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondaryexploitability 1.8 · impact 5.9

v3.18.8highCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Hsecondaryexploitability 2.8 · impact 5.9

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-416US

affected products (93)

Products and version ranges known to be affected.

Amazon Linux 2all versionscert_bundDEcpe:/o:amazon:linux_2:-
Debian Linuxall versionscert_bundDEcpe:/o:debian:debian_linux:-
Dell Secure Connect Gateway Appliance <5.32.00.18all versionscert_bundDE
Google Cloud Platformall versionscert_bundDEcpe:/a:google:cloud_platform:-
Open Source Linux Kernel <4.14.207all versionscert_bundDE
Open Source Linux Kernel <4.14.218all versionscert_bundDE
Open Source Linux Kernel <4.19.158all versionscert_bundDE
Open Source Linux Kernel <4.19.171all versionscert_bundDE
Open Source Linux Kernel <4.4.244all versionscert_bundDE
Open Source Linux Kernel <4.4.254all versionscert_bundDE
Open Source Linux Kernel <4.9.244all versionscert_bundDE
Open Source Linux Kernel <4.9.254all versionscert_bundDE
Open Source Linux Kernel <5.10all versionscert_bundDE
Open Source Linux Kernel <5.10.11all versionscert_bundDE
Open Source Linux Kernel <5.10.236all versionscert_bundDE
Open Source Linux Kernel <5.11all versionscert_bundDE
Open Source Linux Kernel <5.14.19all versionscert_bundDE
Open Source Linux Kernel <5.15.180all versionscert_bundDE
Open Source Linux Kernel <5.15.3all versionscert_bundDE
Open Source Linux Kernel <5.16all versionscert_bundDE

showing 20 of 93

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2025-0861Linux Kernel: Mehrere SchwachstellenDeutsch2025-04-21csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um einen Denial of Service Zustand oder nicht näher spezifizierte Auswirkungen zu verursachen.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund NVD CVE.org MITRE

published 2025-04-17modified 2026-08-04

references (22)

External citations — patches, advisories, analysis.

scry

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