CVE catalog

CVE-2021-20314

libspf2: CVE-2021-20314

Severity: Critical · CVSS 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: Aug 11, 2021, 12:00:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 2.83% · Oct 25, 2026

Stack buffer overflow in libspf2 versions below 1.2.11 when processing certain SPF macros can lead to Denial of service and potentially code execution via malicious crafted SPF explanation messages.

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	libspf2	sid	`1.2.10-11`	fixed
Debian	libspf2	forky	`1.2.10-11`	fixed
Debian	libspf2	trixie	`1.2.10-8.3`	fixed
Debian	libspf2	bookworm	`1.2.10-7.2`	fixed
Alpine	libspf2	3.11	`1.2.10-r5`	fixed
Alpine	libspf2	3.12	`1.2.10-r5`	fixed
Alpine	libspf2	3.13	`1.2.10-r5`	fixed
Alpine	libspf2	3.14	`1.2.10-r5`	fixed
Alpine	libspf2	3.15	`1.2.10-r5`	fixed
Alpine	libspf2	3.16	`1.2.10-r5`	fixed
Alpine	libspf2	3.17	`1.2.10-r5`	fixed
Alpine	libspf2	3.18	`1.2.10-r5`	fixed
Alpine	libspf2	3.19	`1.2.10-r5`	fixed
Alpine	libspf2	3.20	`1.2.10-r5`	fixed
Alpine	libspf2	3.21	`1.2.10-r5`	fixed
Alpine	libspf2	3.21	`1.2.11-r4`	fixed
Alpine	libspf2	3.22	`1.2.10-r5`	fixed
Alpine	libspf2	3.22	`1.2.11-r4`	fixed
Alpine	libspf2	3.23	`1.2.10-r5`	fixed
Alpine	libspf2	3.23	`1.2.11-r4`	fixed
Alpine	libspf2	3.24	`1.2.10-r5`	fixed
Alpine	libspf2	3.24	`1.2.11-r4`	fixed
Ubuntu	libspf2	pro	`1.2.10-7build2`	vulnerable
Ubuntu	libspf2	pro	`1.2.10-7ubuntu0.18.04.1~esm1`	fixed
Ubuntu	libspf2	20.04	`1.2.10-7build3`	vulnerable
Ubuntu	libspf2	20.04	`1.2.10-7build4`	vulnerable
Ubuntu	libspf2	20.04	`1.2.10-7+deb9u2build0.20.04.1`	fixed
Ubuntu	libspf2	pro	`1.2.10-7build2`	vulnerable
Ubuntu	libspf2	pro	`1.2.10-7ubuntu0.18.04.1~esm1`	fixed
Ubuntu	libspf2	20.04	`1.2.10-7build3`	vulnerable
Ubuntu	libspf2	20.04	`1.2.10-7build4`	vulnerable
Ubuntu	libspf2	20.04	`1.2.10-7+deb9u2build0.20.04.1`	fixed
Opensuse	libspf2	tumbleweed	`0.01-5.3`	fixed
Suse	libspf2	package hub 15 sp1	`1.2.10-bp153.5.1`	fixed
Suse	libspf2	package hub 15 sp2	`1.2.10-bp153.5.1`	fixed
Suse	libspf2	package hub 15 sp3	`1.2.10-bp153.5.1`	fixed
Opensuse	libspf2	leap 15.2	`1.2.10-bp153.5.1`	fixed
Opensuse	libspf2	leap 15.3	`1.2.10-bp153.5.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	libspf2	source	sid	`1.2.10-7.1`	not yet assigned	Not reported	Not reported
Debian	libspf2	source	forky	`1.2.10-7.1`	not yet assigned	Not reported	Not reported
Debian	libspf2	source	trixie	`1.2.10-7.1`	not yet assigned	Not reported	Not reported
Debian	libspf2	source	bookworm	`1.2.10-7.1`	not yet assigned	Not reported	Not reported
Alpine	libspf2	apk	3.11	`1.2.10-r5`	Not reported	ALPINE-CVE-2021-20314	Not reported
Alpine	libspf2	apk	3.12	`1.2.10-r5`	Not reported	ALPINE-CVE-2021-20314	Not reported
Alpine	libspf2	apk	3.13	`1.2.10-r5`	Not reported	ALPINE-CVE-2021-20314	Not reported
Alpine	libspf2	apk	3.14	`1.2.10-r5`	Not reported	ALPINE-CVE-2021-20314	Not reported
Alpine	libspf2	apk	3.15	`1.2.10-r5`	Not reported	ALPINE-CVE-2021-20314	Not reported
Alpine	libspf2	apk	3.16	`1.2.10-r5`	Not reported	ALPINE-CVE-2021-20314	Not reported
Alpine	libspf2	apk	3.17	`1.2.10-r5`	Not reported	ALPINE-CVE-2021-20314	Not reported
Alpine	libspf2	apk	3.18	`1.2.10-r5`	Not reported	ALPINE-CVE-2021-20314	Not reported
Alpine	libspf2	apk	3.19	`1.2.10-r5`	Not reported	ALPINE-CVE-2021-20314	Not reported
Alpine	libspf2	apk	3.20	`1.2.10-r5`	Not reported	ALPINE-CVE-2021-20314	Not reported
Alpine	libspf2	apk	3.21	`1.2.10-r5`	Not reported	ALPINE-CVE-2021-20314	Not reported
Alpine	libspf2	apk	3.21	`1.2.11-r4`	Not reported	ALPINE-CVE-2021-20314	Not reported
Alpine	libspf2	apk	3.22	`1.2.10-r5`	Not reported	ALPINE-CVE-2021-20314	Not reported
Alpine	libspf2	apk	3.22	`1.2.11-r4`	Not reported	ALPINE-CVE-2021-20314	Not reported
Alpine	libspf2	apk	3.23	`1.2.10-r5`	Not reported	ALPINE-CVE-2021-20314	Not reported
Alpine	libspf2	apk	3.23	`1.2.11-r4`	Not reported	ALPINE-CVE-2021-20314	Not reported
Alpine	libspf2	apk	3.24	`1.2.10-r5`	Not reported	ALPINE-CVE-2021-20314	Not reported
Alpine	libspf2	apk	3.24	`1.2.11-r4`	Not reported	ALPINE-CVE-2021-20314	Not reported
Ubuntu	libspf2	deb	pro	`1.2.10-7ubuntu0.18.04.1~esm1`	Not reported	USN-6584-1	Not reported
Ubuntu	libspf2	deb	20.04	`1.2.10-7+deb9u2build0.20.04.1`	Not reported	USN-6584-1	Not reported
Ubuntu	libspf2	deb	pro	`1.2.10-7ubuntu0.18.04.1~esm1`	Not reported	UBUNTU-CVE-2021-20314	Not reported
Ubuntu	libspf2	deb	20.04	`1.2.10-7+deb9u2build0.20.04.1`	Not reported	UBUNTU-CVE-2021-20314	Not reported
Opensuse	libspf2	rpm	tumbleweed	`0.01-5.3`	Not reported	OPENSUSE-SU-2024:10995-1	Not reported
Suse	libspf2	rpm	package hub 15 sp1	`1.2.10-bp153.5.1`	Not reported	OPENSUSE-SU-2021:1187-1	Not reported
Suse	libspf2	rpm	package hub 15 sp2	`1.2.10-bp153.5.1`	Not reported	OPENSUSE-SU-2021:1187-1	Not reported
Suse	libspf2	rpm	package hub 15 sp3	`1.2.10-bp153.5.1`	Not reported	OPENSUSE-SU-2021:1187-1	Not reported
Opensuse	libspf2	rpm	leap 15.2	`1.2.10-bp153.5.1`	Not reported	OPENSUSE-SU-2021:1187-1	Not reported
Opensuse	libspf2	rpm	leap 15.3	`1.2.10-bp153.5.1`	Not reported	OPENSUSE-SU-2021:1187-1	Not reported

OpenFactory catalog packages

[openSUSE Tumbleweed]

[libspf2-2]Unknown
Source package: [libspf2]
Details (1)
- 1.2.11-8.9 · x86_64 · tumbleweed
  Unknown · Fixed: 0.01-5.3
  Version impact unknown
  dsa · libspf2 · opensuse · tumbleweed
[libspf2-apidocs]Unknown
Source package: [libspf2]
Details (1)
- 1.2.11-8.9 · noarch · tumbleweed
  Unknown · Fixed: 0.01-5.3
  Version impact unknown
  dsa · libspf2 · opensuse · tumbleweed
[libspf2-devel]Unknown
Source package: [libspf2]
Details (1)
- 1.2.11-8.9 · x86_64 · tumbleweed
  Unknown · Fixed: 0.01-5.3
  Version impact unknown
  dsa · libspf2 · opensuse · tumbleweed
[libspf2-tools]Unknown
Source package: [libspf2]
Details (1)
- 1.2.11-8.9 · x86_64 · tumbleweed
  Unknown · Fixed: 0.01-5.3
  Version impact unknown
  dsa · libspf2 · opensuse · tumbleweed
[perl-Mail-SPF_XS]Unknown
Source package: [libspf2]
Details (1)
- 0.01-8.9 · x86_64 · tumbleweed
  Unknown · Fixed: 0.01-5.3
  Version impact unknown
  dsa · libspf2 · opensuse · tumbleweed

[Debian 12 (Bookworm)]

[libmail-spf-xs-perl]Fixed
Source package: [libspf2]
Details (2)
- 1.2.10-7.2+b1 · amd64 · bookworm
  Fixed · Fixed: 1.2.10-7.1
  dsa · libspf2 · debian · bookworm; dsa · libspf2 · debian · 12
- 1.2.10-7.2+b1 · arm64 · bookworm
  Fixed · Fixed: 1.2.10-7.1
  dsa · libspf2 · debian · bookworm; dsa · libspf2 · debian · 12
[libspf2-2]Fixed
Source package: [libspf2]
Details (2)
- 1.2.10-7.2+b1 · amd64 · bookworm
  Fixed · Fixed: 1.2.10-7.1
  dsa · libspf2 · debian · bookworm; dsa · libspf2 · debian · 12
- 1.2.10-7.2+b1 · arm64 · bookworm
  Fixed · Fixed: 1.2.10-7.1
  dsa · libspf2 · debian · bookworm; dsa · libspf2 · debian · 12
[libspf2-2-dbg]Fixed
Source package: [libspf2]
Details (2)
- 1.2.10-7.2+b1 · amd64 · bookworm
  Fixed · Fixed: 1.2.10-7.1
  dsa · libspf2 · debian · bookworm; dsa · libspf2 · debian · 12
- 1.2.10-7.2+b1 · arm64 · bookworm
  Fixed · Fixed: 1.2.10-7.1
  dsa · libspf2 · debian · bookworm; dsa · libspf2 · debian · 12
[libspf2-dev]Fixed
Source package: [libspf2]
Details (2)
- 1.2.10-7.2+b1 · amd64 · bookworm
  Fixed · Fixed: 1.2.10-7.1
  dsa · libspf2 · debian · bookworm; dsa · libspf2 · debian · 12
- 1.2.10-7.2+b1 · arm64 · bookworm
  Fixed · Fixed: 1.2.10-7.1
  dsa · libspf2 · debian · bookworm; dsa · libspf2 · debian · 12
[spfquery]Fixed
Source package: [libspf2]
Details (2)
- 1.2.10-7.2+b1 · amd64 · bookworm
  Fixed · Fixed: 1.2.10-7.1
  dsa · libspf2 · debian · bookworm; dsa · libspf2 · debian · 12
- 1.2.10-7.2+b1 · arm64 · bookworm
  Fixed · Fixed: 1.2.10-7.1
  dsa · libspf2 · debian · bookworm; dsa · libspf2 · debian · 12

[Debian 13 (Trixie)]

[libmail-spf-xs-perl]Fixed
Source package: [libspf2]
Details (2)
- 1.2.10-8.3 · amd64 · trixie
  Fixed · Fixed: 1.2.10-7.1
  dsa · libspf2 · debian · 13
- 1.2.10-8.3 · arm64 · trixie
  Fixed · Fixed: 1.2.10-7.1
  dsa · libspf2 · debian · 13
[libspf2-2t64]Fixed
Source package: [libspf2]
Details (2)
- 1.2.10-8.3 · amd64 · trixie
  Fixed · Fixed: 1.2.10-7.1
  dsa · libspf2 · debian · 13
- 1.2.10-8.3 · arm64 · trixie
  Fixed · Fixed: 1.2.10-7.1
  dsa · libspf2 · debian · 13
[libspf2-dev]Fixed
Source package: [libspf2]
Details (2)
- 1.2.10-8.3 · amd64 · trixie
  Fixed · Fixed: 1.2.10-7.1
  dsa · libspf2 · debian · 13
- 1.2.10-8.3 · arm64 · trixie
  Fixed · Fixed: 1.2.10-7.1
  dsa · libspf2 · debian · 13
[spfquery]Fixed
Source package: [libspf2]
Details (2)
- 1.2.10-8.3 · amd64 · trixie
  Fixed · Fixed: 1.2.10-7.1
  dsa · libspf2 · debian · 13
- 1.2.10-8.3 · arm64 · trixie
  Fixed · Fixed: 1.2.10-7.1
  dsa · libspf2 · debian · 13

Observed: Oct 23, 2026, 5:54:20 PM UTC

References

[Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]