CVE-2021-27645

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

0.37% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 30.5% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

NVD analysis status

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

Red Hat severity

Low. 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

2021-02-24 00:00Z5 YR AGO

Last updated

2025-06-09 14:58Z1 YR AGO

Reserved

2021-02-24

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Low (CVSS 2.5)

CNA CVSS vector

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

Weaknesses

• CWE-415Double FreeVariant
• CWE-416Use After FreeVariant

Data version

5.1

Document digest

f59ae8158572308bf54adb08a4f8262d117fc67ede75469f79d59b6681009b43

• sourceware.orghttps://sourceware.org/bugzilla/show_bug.cgi?id=27462
• lists.fedoraproject.orgFEDORA-2021-6749bfcfd9https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/I7TS26LIZSOBLGJEZMJX4PXT5BQDE2WS/vendor-advisory
• lists.fedoraproject.orgFEDORA-2021-2ba993d6c5https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7LZNT6KTMCCWPWXEOGSHD3YLYZKUGMH5/vendor-advisory
• security.gentoo.orgGLSA-202107-07https://security.gentoo.org/glsa/202107-07vendor-advisory
• lists.debian.org[debian-lts-announce] 20221017 [SECURITY] [DLA 3152-1] glibc security updatehttps://lists.debian.org/debian-lts-announce/2022/10/msg00021.htmlmailing-list