01 Record

CVE-2021-47566

proc/vmcore: fix clearing user buffer by properly using clear_user()

UnratedPUBLISHEDCNA: Linux

CNA base scoreUnratedNo CNA CVSS vector

View raw JSON

02 Description

proc/vmcore: fix clearing user buffer by properly using clear_user()

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 ImpactpartialSuccessful exploitation gives limited 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

0.23% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 13.8% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

Low. 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

2024-05-24 15:12Z2 YR AGO

Last updated

2026-05-11 13:57Z3 MO AGO

Reserved

2024-05-24

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-787Out-of-bounds WriteBase
CWE-501Trust Boundary ViolationBase

Data version

5.2

Document digest

9ecee473a6cc413d9654b2dbc0fa2944ff88a0b672a6b64dbeeb0a563321dc00

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux997c136f518c5debd63847e78e2a8694f56dcf90 to < a9e164bd160be8cbee1df70acb379129e3cd2e7c, 997c136f518c5debd63847e78e2a8694f56dcf90 to < 33a7d698f30fa0b99d50569e9909d3baa65d8f6a, 997c136f518c5debd63847e78e2a8694f56dcf90 to < 99d348b82bcb36171f24411d3f1a15706a2a937a, 997c136f518c5debd63847e78e2a8694f56dcf90 to < 9ef384ed300d1bcfb23d0ab0b487d544444d4b52, 997c136f518c5debd63847e78e2a8694f56dcf90 to < fd7974c547abfb03072a4ee706d3a6f182266f89, 997c136f518c5debd63847e78e2a8694f56dcf90 to < a8a917058faf4abaec9fb614bb6d5f8fe3529ec6, 997c136f518c5debd63847e78e2a8694f56dcf90 to < 7b3a34f08d11e7f05cd00b8e09adaa15192f0ad1, 997c136f518c5debd63847e78e2a8694f56dcf90 to < c1e63117711977cc4295b2ce73de29dd17066c82, 3.0—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/a9e164bd160be8cbee1df70acb379129e3cd2e7c
git.kernel.orghttps://git.kernel.org/stable/c/33a7d698f30fa0b99d50569e9909d3baa65d8f6a
git.kernel.orghttps://git.kernel.org/stable/c/99d348b82bcb36171f24411d3f1a15706a2a937a
git.kernel.orghttps://git.kernel.org/stable/c/9ef384ed300d1bcfb23d0ab0b487d544444d4b52
git.kernel.orghttps://git.kernel.org/stable/c/fd7974c547abfb03072a4ee706d3a6f182266f89
git.kernel.orghttps://git.kernel.org/stable/c/a8a917058faf4abaec9fb614bb6d5f8fe3529ec6
git.kernel.orghttps://git.kernel.org/stable/c/7b3a34f08d11e7f05cd00b8e09adaa15192f0ad1
git.kernel.orghttps://git.kernel.org/stable/c/c1e63117711977cc4295b2ce73de29dd17066c82

01 Record index

CVE-2021-47566

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2021-47566

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References