CVE catalog

CVE-2021-38604

glibc: CVE-2021-38604

Severity: High · CVSS 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C
Published: Aug 12, 2021, 4:15:00 PM UTC
Source: [NVD] · [CVE record]
EPSS: 3.72% · Oct 22, 2026

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.

Vulnerable and fixed packages

Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.

Distribution	Package	Release	Version	Status
Debian	glibc	sid	`2.43-7`	not affected
Debian	glibc	forky	`2.43-7`	not affected
Debian	glibc	trixie	`2.41-12+deb13u4`	not affected
Debian	glibc	bookworm	`2.36-9+deb12u14`	not affected
Debian	glibc	bookworm-security	`2.36-9+deb12u7`	not affected
Cpe	glibc	Not reported	Not reported	unknown
Cpe	fedora	Not reported	Not reported	unknown
Cpe	communications_cloud_native_core_binding_support_function	Not reported	Not reported	unknown
Cpe	communications_cloud_native_core_network_function_cloud_native_environment	Not reported	Not reported	unknown
Cpe	communications_cloud_native_core_network_repository_function	Not reported	Not reported	unknown
Cpe	communications_cloud_native_core_security_edge_protection_proxy	Not reported	Not reported	unknown
Cpe	communications_cloud_native_core_unified_data_repository	Not reported	Not reported	unknown
Cpe	enterprise_operations_monitor	Not reported	Not reported	unknown

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	glibc	source	sid	`Not affected`	unimportant	Not reported	Not reported
Debian	glibc	source	forky	`Not affected`	unimportant	Not reported	Not reported
Debian	glibc	source	trixie	`Not affected`	unimportant	Not reported	Not reported
Debian	glibc	source	bookworm	`Not affected`	unimportant	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[glibc-doc]Not affected
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · all · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · all · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · all · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · all · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
[glibc-source]Not affected
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · all · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · all · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · all · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · all · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
[libc6]Not affected
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · arm64 · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
[libc6-dbg]Not affected
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · arm64 · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
[libc6-dev]Not affected
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · arm64 · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
[libc6-dev-i386]Not affected
Source package: [glibc]
Details (2)
- 2.36-9+deb12u14 · amd64 · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
[libc6-dev-x32]Not affected
Source package: [glibc]
Details (2)
- 2.36-9+deb12u14 · amd64 · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
[libc6-i386]Not affected
Source package: [glibc]
Details (2)
- 2.36-9+deb12u14 · amd64 · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
[libc6-x32]Not affected
Source package: [glibc]
Details (2)
- 2.36-9+deb12u14 · amd64 · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
[libc-bin]Not affected
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · arm64 · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
[libc-dev-bin]Not affected
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · arm64 · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
[libc-devtools]Not affected
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · arm64 · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
[libc-l10n]Not affected
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · all · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · all · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · all · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · all · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
[locales]Not affected
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · all · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · all · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · all · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · all · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
[locales-all]Not affected
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · arm64 · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
[nscd]Not affected
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · arm64 · bookworm
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Not affected
  dsa · glibc · debian · bookworm

Observed: Oct 23, 2026, 6:01:53 PM UTC

References

[CERT-Bund public advisories] · [CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]