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CVE-2021-38604

Published: Aug 12, 2021Updated: May 30, 2025 Sources: CVE List NVD BDU csafCWE-476
NVD MITRE
7.5CVSSHIGH
EPSS Score
3.0%
Top 14.2%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

In librt in the GNU C Library (aka glibc) through 2.34, sysdeps/unix/sysv/linux/mq_notify.c mishandles certain NOTIFY_REMOVED data, leading to a NULL pointer dereference. NOTE: this vulnerability was introduced as a side effect of the CVE-2021-33574 fix.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-476

Affected Products

glibcThe GNU Project
On-premLibrary
Operating Systems / linux-distro
glibcgnuOSS Libraries
fedorafedoraproject
On-premOS
Operating Systems / linux-distro
communications cloud native core binding support functionoracle
On-prem
Databases / relational
communications cloud native core network function cloud native environmentoracle
On-premDatabase
Databases / data-warehouse-analytics
the gnu projectoss-projectUSOperating Systemsaka gnu
gnuoss-projectUSOSS Librariesaka g. nu
fedoraprojectoss-projectUSOperating Systemsaka fedora project
oraclecommercialUSDatabasesaka oracle corp.
and 5 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

Click technique nodes to view MITRE ATT&CK details. Scroll to zoom, drag to pan.

Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Impact
Initial Access
View detailed technique mapping

References

https://blog.tuxcare.com/cve/tuxcare-team-identifies-cve-2021-38604-a-new-vulnerability-in-glibc
blog.tuxcare.com
https://sourceware.org/bugzilla/show_bug.cgi?id=28213
sourceware.org
https://sourceware.org/git/?p=glibc.git;a=commit;h=4cc79c217744743077bf7a0ec5e0a4318f1e6641
sourceware.org
and 17 more references View all →

Timeline

Published
Aug 12, 2021
Last Updated
May 30, 2025

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