CVE-2021-47644

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

0.25% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 16.0% of scored records. A rank, not a probability.

NVD base score

5.5 (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:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-08-11.

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.

Published

2025-02-26 01:54Z1 YR AGO

Last updated

2026-08-26 11:00Z9 DAYS AGO

Reserved

2025-02-26

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Medium (CVSS 5.5)

CNA CVSS vector

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

Weaknesses

• CWE-401Missing Release of Memory after Effective LifetimeVariant

Data version

5.2

Document digest

167a186c9c869ad58a3112d4154ca1c3d904c5686486d6384935581910988748

• git.kernel.orghttps://git.kernel.org/stable/c/8dce4b265a5357731058f69645840dabc718c687
• git.kernel.orghttps://git.kernel.org/stable/c/bd01629315ffd5b63da91d0bd529a77d30e55028
• git.kernel.orghttps://git.kernel.org/stable/c/ff3357bffd9fb78f59762d8955afc7382a279079
• git.kernel.orghttps://git.kernel.org/stable/c/c1ba65100a359fe28cfe37e09e10c99f247cbf1e
• git.kernel.orghttps://git.kernel.org/stable/c/1e501ec38796f43e995731d1bcd4173cb1ccfce0
• git.kernel.orghttps://git.kernel.org/stable/c/82e3a496eb56da0b9f29fdc5b63cedb3289e91de