CVE-2021-47478

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

0.68% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 52.1% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

Published

2024-05-22 08:19Z2 YR AGO

Last updated

2026-08-05 08:47Z2 MO AGO

Reserved

2024-05-22

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Critical (CVSS 9.1)

CNA CVSS vector

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

Weaknesses

• CWE-125Out-of-bounds ReadBase

Data version

5.2

Document digest

0457f1643653582de5a6729e571c746d936269dd6bd589596e9afe6dd853a2c4

• git.kernel.orghttps://git.kernel.org/stable/c/156ce5bb6cc43a80a743810199defb1dc3f55b7f
• git.kernel.orghttps://git.kernel.org/stable/c/9ec33a9b8790c212cc926a88c5e2105f97f3f57e
• git.kernel.orghttps://git.kernel.org/stable/c/afbd40f425227e661d991757e11cc4db024e761f
• git.kernel.orghttps://git.kernel.org/stable/c/b0ddff8d68f2e43857a84dce54c3deab181c8ae1
• git.kernel.orghttps://git.kernel.org/stable/c/6e80e9314f8bb52d9eabe1907698718ff01120f5
• git.kernel.orghttps://git.kernel.org/stable/c/86d4aedcbc69c0f84551fb70f953c24e396de2d7
• git.kernel.orghttps://git.kernel.org/stable/c/b2fa1f52d22c5455217b294629346ad23a744945
• git.kernel.orghttps://git.kernel.org/stable/c/e7fb722586a2936b37bdff096c095c30ca06404d
• git.kernel.orghttps://git.kernel.org/stable/c/e96a1866b40570b5950cda8602c2819189c62a48