CVE-2021-30499

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

1.24% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 68.8% 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:N/UI:R/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

2021-05-26 23:50Z5 YR AGO

Last updated

2025-11-03 19:25Z11 MO AGO

Reserved

2021-04-12

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass
• CWE-787Out-of-bounds WriteBase

Data version

5.2

Document digest

c44a8bc5d5b417d1a489612f32ea155d6abcffc9979516be1aec28da111b58fd

• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1948679x_refsource_MISC
• github.comhttps://github.com/cacalabs/libcaca/issues/54x_refsource_MISC
• lists.fedoraproject.orgFEDORA-2022-fc6b53e7a2https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6WFGYICNTMNDNMDDUV4G2RYFB5HNJCOV/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2022-e3b9986722https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PC7EGOEQ5C4OD66ZUJJIIYEXBTZOCMZX/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2022-3d291845d8https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZSBCRN6EGQJUVOSD4OEEQ6XORHEM2CUL/vendor-advisoryx_refsource_FEDORA
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2024/04/msg00004.html
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2025/07/msg00019.html