CVE-2021-33574

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2021-33574
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2021-05-25 22:15:10 UTC
Updated2026-10-14 12:17:12 UTC
DescriptionThe mq_notify function in the GNU C Library (aka glibc) versions 2.32 and 2.33 has a use-after-free. It may use the notification thread attributes object (passed through its struct sigevent parameter) after it has been freed by the caller, leading to a denial of service (application crash) or possibly unspecified other impact.

Risk And Classification

Primary CVSS: v3.1 9.8 CRITICAL from [email protected]

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem Types: CWE-416 | n/a

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary9.8CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
2.0[email protected]Primary7.5AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
Partial

AV:N/AC:L/Au:N/C:P/I:P/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Debian Debian Linux 10.0 All All All
Operating System Fedoraproject Fedora 33 All All All
Operating System Fedoraproject Fedora 34 All All All
Application Gnu Glibc 2.32 All All All
Application Gnu Glibc 2.33 All All All
Application Netapp Cloud Backup - All All All
Application Netapp E-series Santricity Os Controller All All All All
Hardware Netapp H300e - All All All
Operating System Netapp H300e Firmware - All All All
Hardware Netapp H300s - All All All
Operating System Netapp H300s Firmware - All All All
Hardware Netapp H410s - All All All
Operating System Netapp H410s Firmware - All All All
Hardware Netapp H500e - All All All
Operating System Netapp H500e Firmware - All All All
Hardware Netapp H500s - All All All
Operating System Netapp H500s Firmware - All All All
Hardware Netapp H700e - All All All
Operating System Netapp H700e Firmware - All All All
Hardware Netapp H700s - All All All
Operating System Netapp H700s Firmware - All All All
Operating System Netapp Solidfire Baseboard Management Controller Firmware - All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified
ADP Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP affected V3.1.0 V3.1.5 custom Not specified

References

ReferenceSourceLinkTags
cert-portal.siemens.com/productcert/html/ssa-398330.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
glibc: Multiple vulnerabilities (GLSA 202107-07) — Gentoo security af854a3a-2127-422b-91ae-364da2661108 security.gentoo.org Third Party Advisory
[SECURITY] Fedora 33 Update: glibc-2.32-8.fc33 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
27896 – mq_notify does not handle separately allocated thread attributes af854a3a-2127-422b-91ae-364da2661108 sourceware.org Issue Tracking
cert-portal.siemens.com/productcert/html/ssa-831302.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
[SECURITY] Fedora 34 Update: glibc-2.33-16.fc34 - package-announce - Fedora Mailing-Lists af854a3a-2127-422b-91ae-364da2661108 lists.fedoraproject.org
27896 – mq_notify does not handle separately allocated thread attributes af854a3a-2127-422b-91ae-364da2661108 sourceware.org Exploit, Issue Tracking, Third Party Advisory
[SECURITY] [DLA 3152-1] glibc security update af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
CVE-2021-33574 GNU C Library (glibc) Vulnerability in NetApp Products | NetApp Product Security af854a3a-2127-422b-91ae-364da2661108 security.netapp.com Third Party Advisory
[SECURITY] Fedora 34 Update: glibc-2.33-16.fc34 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
[SECURITY] Fedora 33 Update: glibc-2.32-8.fc33 - package-announce - Fedora Mailing-Lists MITRE lists.fedoraproject.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 159493 Oracle Enterprise Linux Security Update for glibc (ELSA-2021-4358)
  • 159561 Oracle Enterprise Linux Security Update for glibc (ELSA-2021-9560)
  • 180332 Debian Security Update for glibc (CVE-2021-33574)
  • 181138 Debian Security Update for glibc (DLA 3152-1)
  • 239791 Red Hat Update for glibc security (RHSA-2021:4358)
  • 281629 Fedora Security Update for glibc (FEDORA-2021-7ddb8b0537)
  • 281689 Fedora Security Update for glibc (FEDORA-2021-f29b4643c7)
  • 353127 Amazon Linux Security Advisory for glibc : ALAS2-2022-1736
  • 591406 Siemens SIMATIC S7-1500 CPU GNU/Linux subsystem Multiple Vulnerabilities (SSB-439005, ICSA-22-104-13)
  • 670537 EulerOS Security Update for glibc (EulerOS-SA-2021-2295)
  • 670572 EulerOS Security Update for glibc (EulerOS-SA-2021-2330)
  • 670616 EulerOS Security Update for glibc (EulerOS-SA-2021-2374)
  • 670768 EulerOS Security Update for glibc (EulerOS-SA-2021-2526)
  • 670792 EulerOS Security Update for glibc (EulerOS-SA-2021-2550)
  • 670928 EulerOS Security Update for glibc (EulerOS-SA-2021-2374)
  • 670967 EulerOS Security Update for glibc (EulerOS-SA-2021-2581)
  • 710069 Gentoo Linux glibc Multiple vulnerabilities (GLSA 202107-07)
  • 751195 SUSE Enterprise Linux Security Update for glibc (SUSE-SU-2021:3290-1)
  • 751196 SUSE Enterprise Linux Security Update for glibc (SUSE-SU-2021:3289-1)
  • 751200 OpenSUSE Security Update for glibc (openSUSE-SU-2021:3291-1)
  • 751212 SUSE Enterprise Linux Security Update for glibc (SUSE-SU-2021:3385-1)
  • 751242 OpenSUSE Security Update for glibc (openSUSE-SU-2021:1374-1)
  • 900034 CBL-Mariner Linux Security Update for glibc 2.28
  • 902905 Common Base Linux Mariner (CBL-Mariner) Security Update for glibc (4243)
  • 940330 AlmaLinux Security Update for glibc (ALSA-2021:4358)

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report