CVE-2021-28715

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

0.33% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 26.1% of scored records. A rank, not a probability.

NVD base score

6.5 (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:C/C:N/I:N/A:H

NVD analysis status

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

Red Hat severity

No Red Hat rating. Red Hat rates the CVEs that affect its products.

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

2022-01-06 17:06Z4 YR AGO

Last updated

2025-05-22 18:34Z1 YR AGO

Reserved

2021-03-18

Assigning CNA

XEN

Record state

PUBLISHED

Severity

Medium (CVSS 6.5)

CNA CVSS vector

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

Weaknesses

• CWE-770Allocation of Resources Without Limits or ThrottlingBase

Data version

5.1

Document digest

e780c1e078492eeac751213a5bbee4b292080d7450e8486107f414e9b8e716a5

• xenbits.xenproject.orghttps://xenbits.xenproject.org/xsa/advisory-392.txtx_refsource_MISC
• www.debian.orgDSA-5050https://www.debian.org/security/2022/dsa-5050vendor-advisoryx_refsource_DEBIAN
• lists.debian.org[debian-lts-announce] 20220309 [SECURITY] [DLA 2940-1] linux security updatehttps://lists.debian.org/debian-lts-announce/2022/03/msg00011.htmlmailing-listx_refsource_MLIST
• lists.debian.org[debian-lts-announce] 20220309 [SECURITY] [DLA 2941-1] linux-4.19 security updatehttps://lists.debian.org/debian-lts-announce/2022/03/msg00012.htmlmailing-listx_refsource_MLIST
• www.debian.orgDSA-5096https://www.debian.org/security/2022/dsa-5096vendor-advisoryx_refsource_DEBIAN