CVE-2021-40516

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Published Sep 5, 2021 CVSS 3.1 · 7.5 High EPSS 1.6% KEV · Not listed

Description

WeeChat before 3.2.1 allows remote attackers to cause a denial of service (crash) via a crafted WebSocket frame that trigger an out-of-bounds read in plugins/relay/relay-websocket.c in the Relay plugin.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n/a

n/a

affected

Version	Status	Constraints
`n/a`	affected	—

Configuration 1 [-]

cpe:2.3:a:weechat:weechat:*:*:*:*:*:*:*:*

Configuration 2 [-]

cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
Debian DLA	DLA-2770-1	weechat security update
EUVD	EUVD-2021-27692	WeeChat before 3.2.1 allows remote attackers to cause a denial of service (crash) via a crafted WebSocket frame that trigger an out-of-bounds read in plugins/relay/relay-websocket.c in the Relay plugin.
Ubuntu USN	USN-5258-1	WeeChat vulnerabilities

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

Access Vector Network

Access Complexity Low

Authentication None

Confidentiality Impact None

Integrity Impact None

Availability Impact Partial

This CVE is not in the KEV list.

Exploit prediction score: 1.6% (1.594% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://github.com/weechat/weechat/commit/8b1331f98de1714bae15a9ca2e2b393ba49d735b
https://lists.debian.org/debian-lts-announce/2021/09/msg00018.html
https://weechat.org/doc/security/

History

No history.

Subscriptions

Debian Debian Linux

Weechat Weechat

Weaknesses

CWE-125

Sources

CVE record Updated: Aug 4, 2024, 2:44 AM

Status: PUBLISHED
Assigner: mitre
Published: Sep 5, 2021, 5:14 PM
Updated: Aug 4, 2024, 2:44 AM
Reserved: Sep 5, 2021, 12:00 AM

View source JSON

Vulnrichment No data

No data.

NVD Updated: Jun 17, 2026, 4:07 AM

Status: Modified
Published: Sep 5, 2021, 6:15 PM
Modified: Jun 17, 2026, 4:07 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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