7.5

CVE-2021-40516: debian debian_linux Out-of-bounds Read

CVSS: 7.5v3.1HighModified
AliasesMGASA-2021-0466openSUSE-SU-2022:0083-1UBUNTU-CVE-2021-40516
Published 05-09-2021Last modified 04-08-2024
Open JSON

Vulnerability summary

CVE-2021-40516 is a high (CVSS 7.5) Out-of-bounds Read vulnerability in debian debian_linux. EPSS estimates a 1.59% chance of exploitation in the next 30 days, higher than 75.4% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (NVD)
EPSS score
1.59%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 1
DLA-2770-1USN-5258-1

Timeline

  1. 05-09-2021
    PublishedVulnerability first disclosed.
  2. 04-08-2024
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

1.59%

Chance of exploitation in the next 30 days

Percentile

75%

Versus all other CVEs

30-day change

0.00 pp

From 1.59% on 21-09-2026

21-09-202621-10-2026
EPSS score
1.59%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Debian2 products
Mageia1 product
  • weechat< 3.0-1.1.mga8
Opensuse1 product
  • weechat&distro=openSUSE Leap 15.3< 3.2.1-bp153.2.3.1
Suse1 product
  • weechat&distro=SUSE Package Hub 15 SP3< 3.2.1-bp153.2.3.1
Ubuntu1 product
  • weechat< 1.4-2ubuntu0.1+esm1 | < 1.9.1-1ubuntu1+esm1 | < 2.8-1ubuntu0.1~esm1
Weechat1 product

6 vendors · 7 products

References

13 links
Show all 13 references