CVE catalog

CVE-2019-7309

glibc: CVE-2019-7309

Severity: Medium · CVSS 5.5CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Published: Feb 2, 2019, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.61% · Oct 25, 2026

In the GNU C Library (aka glibc or libc6) through 2.29, the memcmp function for the x32 architecture can incorrectly return zero (indicating that the inputs are equal) because the RDX most significant bit is mishandled.

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`	fixed
Debian	glibc	forky	`2.43-7`	fixed
Debian	glibc	trixie	`2.41-12+deb13u4`	fixed
Debian	glibc	bookworm	`2.36-9+deb12u14`	fixed
Debian	glibc	bookworm-security	`2.36-9+deb12u7`	fixed
Cpe	glibc	Not reported	Not reported	unknown
Ubuntu	eglibc	pro	`2.17-93ubuntu4`	vulnerable
Ubuntu	eglibc	pro	`2.18-0ubuntu1`	vulnerable
Ubuntu	eglibc	pro	`2.18-0ubuntu2`	vulnerable
Ubuntu	eglibc	pro	`2.18-0ubuntu4`	vulnerable
Ubuntu	eglibc	pro	`2.18-0ubuntu5`	vulnerable
Ubuntu	eglibc	pro	`2.18-0ubuntu6`	vulnerable
Ubuntu	eglibc	pro	`2.18-0ubuntu7`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu2`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu3`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu4`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu5`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.1`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.3`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.4`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.5`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.6`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.7`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.8`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.9`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.10`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.11`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.13`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.14`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.15`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.15+esm1`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.15+esm2`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.15+esm3`	vulnerable
Ubuntu	eglibc	pro	`2.19-0ubuntu6.15+esm4`	vulnerable
Ubuntu	glibc	pro	`2.26-0ubuntu2`	vulnerable
Ubuntu	glibc	pro	`2.26-0ubuntu2.1`	vulnerable
Ubuntu	glibc	pro	`2.27-0ubuntu2`	vulnerable
Ubuntu	glibc	pro	`2.27-0ubuntu3`	vulnerable
Ubuntu	glibc	pro	`2.27-3ubuntu1`	vulnerable
Ubuntu	glibc	pro	`2.27-3ubuntu1.2`	vulnerable
Ubuntu	glibc	pro	`2.27-3ubuntu1.3`	vulnerable
Ubuntu	glibc	pro	`2.27-3ubuntu1.4`	vulnerable
Ubuntu	glibc	pro	`2.27-3ubuntu1.5`	vulnerable
Ubuntu	glibc	pro	`2.27-3ubuntu1.6`	vulnerable
Ubuntu	glibc	pro	`2.27-3ubuntu1.6+esm1`	vulnerable
Ubuntu	glibc	pro	`2.27-3ubuntu1.6+esm2`	vulnerable
Ubuntu	glibc	pro	`2.27-3ubuntu1.6+esm3`	vulnerable
Ubuntu	glibc	pro	`2.27-3ubuntu1.6+esm4`	vulnerable
Ubuntu	glibc	pro	`2.27-3ubuntu1.6+esm5`	vulnerable
Ubuntu	glibc	pro	`2.27-3ubuntu1.6+esm6`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	glibc	source	sid	`2.28-6`	unimportant	Not reported	Not reported
Debian	glibc	source	forky	`2.28-6`	unimportant	Not reported	Not reported
Debian	glibc	source	trixie	`2.28-6`	unimportant	Not reported	Not reported
Debian	glibc	source	bookworm	`2.28-6`	unimportant	Not reported	Not reported

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[glibc-doc]Fixed
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · all · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · all · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · all · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · all · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
[glibc-source]Fixed
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · all · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · all · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · all · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · all · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
[libc6]Fixed
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · arm64 · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
[libc6-dbg]Fixed
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · arm64 · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
[libc6-dev]Fixed
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · arm64 · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
[libc6-dev-i386]Fixed
Source package: [glibc]
Details (2)
- 2.36-9+deb12u14 · amd64 · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
[libc6-dev-x32]Fixed
Source package: [glibc]
Details (2)
- 2.36-9+deb12u14 · amd64 · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
[libc6-i386]Fixed
Source package: [glibc]
Details (2)
- 2.36-9+deb12u14 · amd64 · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
[libc6-x32]Fixed
Source package: [glibc]
Details (2)
- 2.36-9+deb12u14 · amd64 · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
[libc-bin]Fixed
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · arm64 · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
[libc-dev-bin]Fixed
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · arm64 · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
[libc-devtools]Fixed
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · arm64 · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
[libc-l10n]Fixed
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · all · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · all · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · all · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · all · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
[locales]Fixed
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · all · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · all · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · all · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · all · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
[locales-all]Fixed
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · arm64 · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
[nscd]Fixed
Source package: [glibc]
Details (4)
- 2.36-9+deb12u14 · amd64 · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u14 · arm64 · bookworm
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · amd64 · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm
- 2.36-9+deb12u7 · arm64 · bookworm-security
  Fixed · Fixed: 2.28-6
  dsa · glibc · debian · bookworm

Observed: Oct 23, 2026, 5:44:57 PM UTC

References

[CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]