CVE-2021-3690
HIGH7.5EPSS 0.28%Undertow vulnerable to memory exhaustion due to buffer leak
Published: 7/15/2022Modified: 4/28/2026
Description
A flaw was found in Undertow. A buffer leak on the incoming WebSocket PONG message may lead to memory exhaustion. This flaw allows an attacker to cause a denial of service. The highest threat from this vulnerability is availability.
Affected packages (2)
- Debian/undertowfrom 0, < 2.2.10-1
- Maven/io.undertow:undertow-corefrom 0, < 2.0.40
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References (9)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2021-3690
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2021-3690
- PATCHhttps://github.com/undertow-io/undertow
- WEBhttps://access.redhat.com/security/cve/CVE-2021-3690
- WEBhttps://access.redhat.com/security/cve/cve-2021-3690#cve-cvss-v3
- WEBhttps://bugzilla.redhat.com/show_bug.cgi?id=1991299
- WEBhttps://github.com/undertow-io/undertow/commit/c7e84a0b7efced38506d7d1dfea5902366973877
- WEBhttps://issues.redhat.com/browse/UNDERTOW-1935
- WEBhttps://www.mend.io/vulnerability-database/CVE-2021-3690