CVE-2021-38604 is a NULL pointer dereference vulnerability in the GNU C Library (glibc) through version 2.34, specifically within the mq_notify.c component, affecting products like Fedora and Oracle. This flaw, a side effect of a previous fix (CVE-2021-33574), carries a CVSS score of 7.5 (HIGH), indicating it can be exploited remotely with low complexity to cause a denial of service. Despite its high severity, there is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 2.34CPE matchmatch criteria | cpe:2.3:a:gnu:glibc:*:*:*:*:*:*:*:* | ||
35CPE matchmatch criteria | cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* | ||
22.1.3CPE matchmatch criteria | cpe:2.3:a:oracle:communications_cloud_native_core_binding_support_function:22.1.3:*:*:*:*:*:*:* | ||
22.1.0CPE matchmatch criteria | cpe:2.3:a:oracle:communications_cloud_native_core_network_function_cloud_native_environment:22.1.0:*:*:*:*:*:*:* | ||
22.1.2CPE matchmatch criteria | cpe:2.3:a:oracle:communications_cloud_native_core_network_repository_function:22.1.2:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
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.
Aug 10, 2021glibc: NULL pointer dereference in helper_thread() in mq_notify.c while handling NOTIFY_REMOVED messages
Aug 9, 2021