01 Record

CVE-2021-47668

can: dev: can_restart: fix use after free bug

HighPUBLISHEDCNA: Linux

CNA base score8.8 CVSS v3.xCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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02 Description

can: dev: can_restart: fix use after free bug

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.22% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 13.5% of scored records. A rank, not a probability.

NVD base score

8.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-08-04.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2025-04-17 18:01Z1 YR AGO

Last updated

2026-08-05 08:48Z1 MO AGO

Reserved

2025-04-16

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 8.8)

CNA CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CWE-416Use After FreeVariant

Data version

5.2

Document digest

5d9ca20375e0e5f0bc188fc44214e6c30c704dfb3294ff72ff302718ad6a7680

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux39549eef3587f1c1e8c65c88a2400d10fd30ea17 to < 260925a0b7d2da5449f8ecfd02c1405e0c8a45b8, 39549eef3587f1c1e8c65c88a2400d10fd30ea17 to < bbc6847b9b8978b520f62fbc7c68c54ef0f8d282, 39549eef3587f1c1e8c65c88a2400d10fd30ea17 to < 92668d28c7e6a7a2ba07df287669ffcdf650c421, 39549eef3587f1c1e8c65c88a2400d10fd30ea17 to < 08ab951787098ae0b6c0364aeea7a8138226f234, 39549eef3587f1c1e8c65c88a2400d10fd30ea17 to < ac48ef15826e83f4206c47add61072e8fc76d328, 39549eef3587f1c1e8c65c88a2400d10fd30ea17 to < 593c072b7b3c4d7044416eb039d9ad706bedd67a, 39549eef3587f1c1e8c65c88a2400d10fd30ea17 to < 03f16c5075b22c8902d2af739969e878b0879c94, 2.6.31—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/260925a0b7d2da5449f8ecfd02c1405e0c8a45b8
git.kernel.orghttps://git.kernel.org/stable/c/bbc6847b9b8978b520f62fbc7c68c54ef0f8d282
git.kernel.orghttps://git.kernel.org/stable/c/92668d28c7e6a7a2ba07df287669ffcdf650c421
git.kernel.orghttps://git.kernel.org/stable/c/08ab951787098ae0b6c0364aeea7a8138226f234
git.kernel.orghttps://git.kernel.org/stable/c/ac48ef15826e83f4206c47add61072e8fc76d328
git.kernel.orghttps://git.kernel.org/stable/c/593c072b7b3c4d7044416eb039d9ad706bedd67a
git.kernel.orghttps://git.kernel.org/stable/c/03f16c5075b22c8902d2af739969e878b0879c94

01 Record index

CVE-2021-47668

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2021-47668

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References