CVE-2021-41253

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

1.86% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 78.8% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

2021-11-08 21:45Z4 YR AGO

Last updated

2024-08-04 03:08Z2 YR AGO

Reserved

2021-09-15

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Medium (CVSS 5.9)

CNA CVSS vector

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

Weaknesses

• CWE-122Heap-based Buffer OverflowVariant
• CWE-457Use of Uninitialized VariableVariant
• CWE-908Use of Uninitialized ResourceBase

Data version

5.1

Document digest

859796611cd7004932b15fc8ccc46612323ca0e7a6e517d842d86e0270c38e9b

• github.comhttps://github.com/zyantific/zydis/security/advisories/GHSA-q42v-hv86-3m4gx_refsource_CONFIRM
• github.comhttps://github.com/zyantific/zydis/commit/55dd08c210722aed81b38132f5fd4a04ec1943b5x_refsource_MISC
• huntr.devhttps://huntr.dev/bounties/96b0a482-7041-45b1-9327-c6a4a8f32d3ax_refsource_MISC
• huntr.devhttps://huntr.dev/bounties/d2536d7d-36ce-4723-928c-98d1ee039784x_refsource_MISC