CVE-2021-39926

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

7.95% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 94.7% of scored records. A rank, not a probability.

NVD base score

7.5 (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:N/I:N/A:H

NVD analysis status

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

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

2021-11-19 00:00Z4 YR AGO

Last updated

2024-08-04 02:20Z2 YR AGO

Reserved

2021-08-23

Assigning CNA

GitLab

Record state

PUBLISHED

Severity

High (CVSS 7.5)

CNA CVSS vector

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

Weaknesses

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

Data version

5.1

Document digest

bbb71f6dd1fe22746b2de763e777adc3e8b1a7a8fa1784a873adeeca63b049d3

• www.wireshark.orghttps://www.wireshark.org/security/wnpa-sec-2021-08.html
• gitlab.comhttps://gitlab.com/wireshark/wireshark/-/issues/17649
• gitlab.comhttps://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39926.json
• lists.fedoraproject.orgFEDORA-2021-97bd631e0ahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YEWTIRMC2MFQBZ2O5M4CJHJM4JPBHLXH/vendor-advisory
• lists.fedoraproject.orgFEDORA-2021-3747cf6107https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/A6AJFIYIHS3TYDD2EBYBJ5KKE52X34BJ/vendor-advisory
• www.debian.orgDSA-5019https://www.debian.org/security/2021/dsa-5019vendor-advisory
• security.gentoo.orgGLSA-202210-04https://security.gentoo.org/glsa/202210-04vendor-advisory