CVE-2021-47347

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

0.80% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 54.1% 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

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

2024-05-21 14:35Z2 YR AGO

Last updated

2026-08-05 08:47Z1 MO AGO

Reserved

2024-05-21

Assigning CNA

Linux

Record state

PUBLISHED

Severity

High (CVSS 7.8)

CNA CVSS vector

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

Weaknesses

• CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')Base
• CWE-122Heap-based Buffer OverflowVariant

Data version

5.2

Document digest

80e73fac731e0ff9098fc7a0c07cf38efa8544b258013c9a5f45e751ba17dfb0

• git.kernel.orghttps://git.kernel.org/stable/c/57ad99ae3c6738ba87bad259bb57c641ca68ebf6
• git.kernel.orghttps://git.kernel.org/stable/c/d3d8b9c9c7843dce31e284927d4c9904fd5a510a
• git.kernel.orghttps://git.kernel.org/stable/c/0f6c0488368c9ac1aa685821916fadba32f5d1ef
• git.kernel.orghttps://git.kernel.org/stable/c/115103f6e3f1c26c473766c16439c7c8b235529a
• git.kernel.orghttps://git.kernel.org/stable/c/d71dddeb5380613f9ef199f3e7368fd78fb1a46e
• git.kernel.orghttps://git.kernel.org/stable/c/c5e4a10d7bd5d4f419d8b9705dff60cf69b302a1
• git.kernel.orghttps://git.kernel.org/stable/c/302e2ee34c5f7c5d805b7f835d9a6f2b43474e2a
• git.kernel.orghttps://git.kernel.org/stable/c/40af3960a15339e8bbd3be50c3bc7b35e1a0b6ea
• git.kernel.orghttps://git.kernel.org/stable/c/d10a87a3535cce2b890897914f5d0d83df669c63