CVE-2021-38604
HIGHCVSS 7.5/10EPSS 3.04%
Last modified
CVE-2021-38604 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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.. EPSS estimates a 3.04% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Gnu | Glibc | <= 2.34 |
| Fedoraproject | Fedora | 35 |
| Oracle | Communications Cloud Native Core Binding Support Function | 22.1.3 |
| Oracle | Communications Cloud Native Core Network Function Cloud Native Environment | 22.1.0 |
| Oracle | Communications Cloud Native Core Network Repository Function | 22.1.2 |
| Oracle | Communications Cloud Native Core Network Repository Function | 22.2.0 |
| Oracle | Communications Cloud Native Core Security Edge Protection Proxy | 22.1.1 |
| Oracle | Communications Cloud Native Core Unified Data Repository | 22.2.0 |
| Oracle | Enterprise Operations Monitor | 4.3 |
| Oracle | Enterprise Operations Monitor | 4.4 |
| Oracle | Enterprise Operations Monitor | 5.0 |
References
- https://blog.tuxcare.com/cve/tuxcare-team-identifies-cve-2021-38604-a-new-vulnerability-in-glibcExploit, Third Party Advisory
- https://security.gentoo.org/glsa/202208-24Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210909-0005/Third Party Advisory
- https://sourceware.org/bugzilla/show_bug.cgi?id=28213Issue Tracking, Patch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2022.htmlPatch, Third Party Advisory
- https://blog.tuxcare.com/cve/tuxcare-team-identifies-cve-2021-38604-a-new-vulnerability-in-glibcExploit, Third Party Advisory
- https://security.gentoo.org/glsa/202208-24Third Party Advisory
- https://security.netapp.com/advisory/ntap-20210909-0005/Third Party Advisory
- https://sourceware.org/bugzilla/show_bug.cgi?id=28213Issue Tracking, Patch, Third Party Advisory
- https://www.oracle.com/security-alerts/cpujul2022.htmlPatch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
Frequently Asked Questions
What is CVE-2021-38604?
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.
How severe is CVE-2021-38604?
CVE-2021-38604 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.04% probability of exploitation in the next 30 days.
How do I fix CVE-2021-38604?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
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Are you affected by CVE-2021-38604?
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