CVE-2021-38604 @ mufasa
Status
not_applicable
Priority
7.0
Match score
4.0
Risk
DoS
Remote
CVSS
7.5 HIGH
Reason
cpe: glibc; pkgs: glibc, glibc-common, glibc-devel, glibc-headers, glibc-static; version: in-range: glibc-2.17-326.el7_9.99.tuxcare.els4, glibc-common-2.17-326.el7_9.99.tuxcare.els4, glibc-devel-2.17-326.el7_9.99.tuxcare.els4, glibc-headers-2.17-326.el7_9.99.tuxcare.els4, glibc-static-2.17-326.el7_9.99.tuxcare.els4; risk:dos
Created
2026-10-20T18:18:15Z
Updated
2026-10-20T19:09:16Z
Closed
2026-10-20T18:31:47Z
Package interrogation (copy)
Run on the host — click to copy a command. RPM
| Package | Commands |
|---|---|
| glibc-2.17-326.el7_9.99.tuxcare.els4 | |
| glibc-common-2.17-326.el7_9.99.tuxcare.els4 | |
| glibc-devel-2.17-326.el7_9.99.tuxcare.els4 | |
| glibc-headers-2.17-326.el7_9.99.tuxcare.els4 | |
| glibc-static-2.17-326.el7_9.99.tuxcare.els4 |
Inventory lookup
Search package inventory across systems, then return here. Create a ticket on systems the matcher missed.
Suggestions: glibc · glibc-common · glibc-devel · glibc-headers · glibc-static
| System | Matches | Ticket for CVE-2021-38604 | |
|---|---|---|---|
| morris | glibc-common 2.17 | not_applicable open | |
| mufasa | glibc-common 2.17 | not_applicable open |
Related CVE (same fix)
This CVE is subordinated to primary CVE-2021-3999 — same product as CVE-2021-3999
Host OS / kernel
OS
CloudLinux release 7.9 (Boris Yegorov)
(7.9)
· cloudlinux
Arch
x86_64
kernel_release
uname -r → 3.10.0-962.3.2.lve1.5.89.el7.x86_64kernel_version
uname -v → #1 SMP Thu Jul 9 15:55:31 UTC 2026For Linux kernel CVEs, kernel_version (Debian packaging / build string) often decides fixed vs not; kernel_release is used for upstream NVD range compares.
Same CVE on other hosts
Open the ticket for this CVE on another system.
| System | Status | Priority | Updated | |
|---|---|---|---|---|
| morris | not_applicable | 7.0 | 2026-10-20T19:09:16Z | Open |
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.
Determination
Related to primary CVE-2021-3999: same product as CVE-2021-3999
Update status
Add note only
Mitigation log
2026-10-20T18:31:47Z — not_applicable
Related to primary CVE-2021-3999: same product as CVE-2021-3999
References
- https://blog.tuxcare.com/cve/tuxcare-team-identifies-cve-2021-38604-a-new-vulnerability-in-glibc
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GYEXYM37RCJWJ6B5KQUYQI4NZBDDYSXP/
- https://security.gentoo.org/glsa/202208-24
- https://security.netapp.com/advisory/ntap-20210909-0005/
- https://sourceware.org/bugzilla/show_bug.cgi?id=28213
- https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=4cc79c217744743077bf7a0ec5e0a4318f1e6641
- https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=b805aebd42364fe696e417808a700fdb9800c9e8
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://blog.tuxcare.com/cve/tuxcare-team-identifies-cve-2021-38604-a-new-vulnerability-in-glibc
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GYEXYM37RCJWJ6B5KQUYQI4NZBDDYSXP/
- https://security.gentoo.org/glsa/202208-24
- https://security.netapp.com/advisory/ntap-20210909-0005/
- https://sourceware.org/bugzilla/show_bug.cgi?id=28213
- https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=4cc79c217744743077bf7a0ec5e0a4318f1e6641
- https://sourceware.org/git/?p=glibc.git%3Ba=commit%3Bh=b805aebd42364fe696e417808a700fdb9800c9e8
NVD: CVE-2021-38604