NULL pointer dereference in GNU Glibc
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.030 (87.0th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 87th percentile — 87.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.030 · newest: 0.030 · change: 0.000
Affected products
- GNU Glibc
- Oracle Communications Cloud Native Core Binding Support Function — versions 22.1.3
- Oracle Communications Cloud Native Core Network Function Environment — versions 22.1.0
- Oracle Communications Cloud Native Core Network Repository Function — versions 22.1.2, 22.2.0
- Oracle Communications Cloud Native Core Security Edge Protection Proxy — versions 22.1.1
- Oracle Communications Cloud Native Core Unified Data Repository — versions 22.2.0
- Oracle Enterprise Operations Monitor — versions 4.3, 4.4, 5.0
- Fedoraproject Fedora — versions 35
Weakness classification (CWE)
Public proof-of-concept exploits
References
- sourceware.org/git/
- sourceware.org/git/
- sourceware.org/bugzilla/show_bug.cgi (Patch, Third Party Advisory, Issue Tracking)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- www.oracle.com/security-alerts/cpujul2022.html (Patch, Third Party Advisory)
- blog.tuxcare.com/cve/tuxcare-team-identifies-cve-2021-38604-a-new-vulnerability… (Exploit, Third Party Advisory)
- security.netapp.com/advisory/ntap-20210909-0005/ (Third Party Advisory)
- security.gentoo.org/glsa/202208-24 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-38604?
- CVE-2021-38604 is a high-severity vulnerability in GNU Glibc, classified under NULL Pointer Dereference. CVSS score: 7.5/10. Published 2021-08-12.
- How severe is CVE-2021-38604?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-38604 known to be exploited?
- 6 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.