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Vulnerability details: VCID-qegr-7n34-fuc1
Vulnerability ID VCID-qegr-7n34-fuc1
Aliases CVE-2021-3597
GHSA-mfhv-gwf8-4m88
Summary undertow Race Condition vulnerability A flaw was found in undertow. The HTTP2SourceChannel fails to write the final frame under some circumstances, resulting in a denial of service. The highest threat from this vulnerability is availability. This flaw affects Undertow versions prior to 2.0.35.SP1, prior to 2.2.6.SP1, prior to 2.2.7.SP1, prior to 2.0.36.SP1, prior to 2.2.9.Final and prior to 2.0.39.Final.
Status Published
Exploitability 0.5
Weighted Severity 6.2
Risk 3.1
Affected and Fixed Packages Package Details
Weaknesses (3)
CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3 5.9 https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-3597.json
epss 0.00103 https://api.first.org/data/v1/epss?cve=CVE-2021-3597
epss 0.0017 https://api.first.org/data/v1/epss?cve=CVE-2021-3597
epss 0.0017 https://api.first.org/data/v1/epss?cve=CVE-2021-3597
epss 0.0017 https://api.first.org/data/v1/epss?cve=CVE-2021-3597
epss 0.0017 https://api.first.org/data/v1/epss?cve=CVE-2021-3597
epss 0.0017 https://api.first.org/data/v1/epss?cve=CVE-2021-3597
epss 0.0017 https://api.first.org/data/v1/epss?cve=CVE-2021-3597
epss 0.0017 https://api.first.org/data/v1/epss?cve=CVE-2021-3597
epss 0.0017 https://api.first.org/data/v1/epss?cve=CVE-2021-3597
epss 0.0017 https://api.first.org/data/v1/epss?cve=CVE-2021-3597
epss 0.0017 https://api.first.org/data/v1/epss?cve=CVE-2021-3597
epss 0.0017 https://api.first.org/data/v1/epss?cve=CVE-2021-3597
epss 0.0017 https://api.first.org/data/v1/epss?cve=CVE-2021-3597
epss 0.0017 https://api.first.org/data/v1/epss?cve=CVE-2021-3597
epss 0.0017 https://api.first.org/data/v1/epss?cve=CVE-2021-3597
epss 0.0017 https://api.first.org/data/v1/epss?cve=CVE-2021-3597
cvssv3.1 5.9 https://bugzilla.redhat.com/show_bug.cgi?id=1970930
generic_textual MODERATE https://bugzilla.redhat.com/show_bug.cgi?id=1970930
cvssv3.1_qr MODERATE https://github.com/advisories/GHSA-mfhv-gwf8-4m88
cvssv3.1 5.9 https://github.com/undertow-io/undertow
generic_textual MODERATE https://github.com/undertow-io/undertow
cvssv2 2.6 https://nvd.nist.gov/vuln/detail/CVE-2021-3597
cvssv3.1 5.9 https://nvd.nist.gov/vuln/detail/CVE-2021-3597
generic_textual MODERATE https://nvd.nist.gov/vuln/detail/CVE-2021-3597
cvssv3.1 5.9 https://security.netapp.com/advisory/ntap-20220804-0003
generic_textual MODERATE https://security.netapp.com/advisory/ntap-20220804-0003
Reference id Reference type URL
https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-3597.json
https://api.first.org/data/v1/epss?cve=CVE-2021-3597
https://bugzilla.redhat.com/show_bug.cgi?id=1970930
https://github.com/undertow-io/undertow
https://nvd.nist.gov/vuln/detail/CVE-2021-3597
https://security.netapp.com/advisory/ntap-20220804-0003
https://security.netapp.com/advisory/ntap-20220804-0003/
989861 https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=989861
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:linux:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:linux:*:*
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:vmware_vsphere:*:*
cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:active_iq_unified_manager:-:*:*:*:*:windows:*:*
cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:oncommand_insight:-:*:*:*:*:*:*:*
cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:netapp:oncommand_workflow_automation:-:*:*:*:*:*:*:*
cpe:2.3:a:redhat:fuse:1.0:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:redhat:fuse:1.0:*:*:*:*:*:*:*
cpe:2.3:a:redhat:jboss_enterprise_application_platform:-:*:*:*:text-only:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:redhat:jboss_enterprise_application_platform:-:*:*:*:text-only:*:*:*
cpe:2.3:a:redhat:openshift_application_runtimes:-:*:*:*:text-only:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:redhat:openshift_application_runtimes:-:*:*:*:text-only:*:*:*
cpe:2.3:a:redhat:single_sign-on:-:*:*:*:text-only:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:redhat:single_sign-on:-:*:*:*:text-only:*:*:*
cpe:2.3:a:redhat:undertow:*:*:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:redhat:undertow:*:*:*:*:*:*:*:*
cpe:2.3:a:redhat:undertow:2.0.35:-:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:redhat:undertow:2.0.35:-:*:*:*:*:*:*
cpe:2.3:a:redhat:undertow:2.0.36:-:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:redhat:undertow:2.0.36:-:*:*:*:*:*:*
cpe:2.3:a:redhat:undertow:2.0.39:-:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:redhat:undertow:2.0.39:-:*:*:*:*:*:*
cpe:2.3:a:redhat:undertow:2.2.6:-:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:redhat:undertow:2.2.6:-:*:*:*:*:*:*
cpe:2.3:a:redhat:undertow:2.2.7:-:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:redhat:undertow:2.2.7:-:*:*:*:*:*:*
cpe:2.3:a:redhat:undertow:2.2.9:-:*:*:*:*:*:* https://nvd.nist.gov/vuln/search/results?adv_search=true&isCpeNameSearch=true&query=cpe:2.3:a:redhat:undertow:2.2.9:-:*:*:*:*:*:*
GHSA-mfhv-gwf8-4m88 https://github.com/advisories/GHSA-mfhv-gwf8-4m88
RHSA-2021:3466 https://access.redhat.com/errata/RHSA-2021:3466
RHSA-2021:3467 https://access.redhat.com/errata/RHSA-2021:3467
RHSA-2021:3468 https://access.redhat.com/errata/RHSA-2021:3468
RHSA-2021:3471 https://access.redhat.com/errata/RHSA-2021:3471
RHSA-2021:3516 https://access.redhat.com/errata/RHSA-2021:3516
RHSA-2021:3534 https://access.redhat.com/errata/RHSA-2021:3534
RHSA-2021:3656 https://access.redhat.com/errata/RHSA-2021:3656
RHSA-2021:3658 https://access.redhat.com/errata/RHSA-2021:3658
RHSA-2021:3660 https://access.redhat.com/errata/RHSA-2021:3660
RHSA-2021:5134 https://access.redhat.com/errata/RHSA-2021:5134
RHSA-2022:1179 https://access.redhat.com/errata/RHSA-2022:1179
No exploits are available.
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://access.redhat.com/hydra/rest/securitydata/cve/CVE-2021-3597.json
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://bugzilla.redhat.com/show_bug.cgi?id=1970930
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://github.com/undertow-io/undertow
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: AV:N/AC:H/Au:N/C:N/I:N/A:P Found at https://nvd.nist.gov/vuln/detail/CVE-2021-3597
Exploitability (E) Access Vector (AV) Access Complexity (AC) Authentication (Au) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

high

functional

unproven

proof_of_concept

not_defined

local

adjacent_network

network

high

medium

low

multiple

single

none

none

partial

complete

none

partial

complete

none

partial

complete
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://nvd.nist.gov/vuln/detail/CVE-2021-3597
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H Found at https://security.netapp.com/advisory/ntap-20220804-0003
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
Exploit Prediction Scoring System (EPSS)
Percentile 0.29209
EPSS Score 0.00103
Published At July 4, 2025, 12:55 p.m.
Date Actor Action Source VulnerableCode Version
2025-07-01T12:27:00.048839+00:00 GithubOSV Importer Import https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2022/05/GHSA-mfhv-gwf8-4m88/GHSA-mfhv-gwf8-4m88.json 36.1.3