CVE catalog

CVE-2021-40540

ulfius: CVE-2021-40540

Severity: Critical · CVSS 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: Sep 7, 2021, 2:15:00 AM UTC
Source: [NVD] · [CVE record]
EPSS: 2.63% · Oct 25, 2026

ulfius_uri_logger in Ulfius HTTP Framework before 2.7.4 omits con_info initialization and a con_info->request NULL check for certain malformed HTTP requests.

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	ulfius	sid	`2.7.15-3`	fixed
Debian	ulfius	forky	`2.7.15-3`	fixed
Debian	ulfius	trixie	`2.7.15-2.2`	fixed
Debian	ulfius	bookworm	`2.7.13-1`	fixed
Ubuntu	ulfius	18.04	`2.1.0-1`	vulnerable
Ubuntu	ulfius	18.04	`2.1.2-1`	vulnerable
Ubuntu	ulfius	18.04	`2.2.4-1`	vulnerable
Ubuntu	ulfius	20.04	`2.5.2-4`	vulnerable
Ubuntu	ulfius	22.04	`2.7.4-1ubuntu3`	vulnerable
Ubuntu	ulfius	22.04	`2.7.6-1ubuntu1`	vulnerable
Ubuntu	ulfius	22.04	`2.7.7-1`	vulnerable
Opensuse	ulfius	tumbleweed	`2.7.4-1.2`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	ulfius	source	sid	`2.7.1-2`	not yet assigned	Not reported	[993851]
Debian	ulfius	source	forky	`2.7.1-2`	not yet assigned	Not reported	[993851]
Debian	ulfius	source	trixie	`2.7.1-2`	not yet assigned	Not reported	[993851]
Debian	ulfius	source	bookworm	`2.7.1-2`	not yet assigned	Not reported	[993851]
Opensuse	ulfius	rpm	tumbleweed	`2.7.4-1.2`	Not reported	OPENSUSE-SU-2024:11481-1	Not reported

[Debian bug #993851]

OpenFactory catalog packages

[openSUSE Tumbleweed]

[libulfius2_7]Unknown
Source package: [ulfius]
Details (1)
- 2.7.15-1.7 · x86_64 · tumbleweed
  Unknown · Fixed: 2.7.4-1.2
  Version impact unknown
  dsa · ulfius · opensuse · tumbleweed
[ulfius-devel]Unknown
Source package: [ulfius]
Details (1)
- 2.7.15-1.7 · x86_64 · tumbleweed
  Unknown · Fixed: 2.7.4-1.2
  Version impact unknown
  dsa · ulfius · opensuse · tumbleweed
[uwsc]Unknown
Source package: [ulfius]
Details (1)
- 2.7.15-1.7 · x86_64 · tumbleweed
  Unknown · Fixed: 2.7.4-1.2
  Version impact unknown
  dsa · ulfius · opensuse · tumbleweed

[Debian 12 (Bookworm)]

[libulfius2.7]Fixed
Source package: [ulfius]
Details (2)
- 2.7.13-1 · amd64 · bookworm
  Fixed · Fixed: 2.7.1-2
  dsa · ulfius · debian · bookworm; dsa · ulfius · debian · 12
- 2.7.13-1 · arm64 · bookworm
  Fixed · Fixed: 2.7.1-2
  dsa · ulfius · debian · bookworm; dsa · ulfius · debian · 12
[libulfius-dev]Fixed
Source package: [ulfius]
Details (2)
- 2.7.13-1 · amd64 · bookworm
  Fixed · Fixed: 2.7.1-2
  dsa · ulfius · debian · bookworm; dsa · ulfius · debian · 12
- 2.7.13-1 · arm64 · bookworm
  Fixed · Fixed: 2.7.1-2
  dsa · ulfius · debian · bookworm; dsa · ulfius · debian · 12
[uwsc]Fixed
Source package: [ulfius]
Details (2)
- 2.7.13-1 · amd64 · bookworm
  Fixed · Fixed: 2.7.1-2
  dsa · ulfius · debian · bookworm; dsa · ulfius · debian · 12
- 2.7.13-1 · arm64 · bookworm
  Fixed · Fixed: 2.7.1-2
  dsa · ulfius · debian · bookworm; dsa · ulfius · debian · 12

[Debian 13 (Trixie)]

[libulfius2.7t64]Fixed
Source package: [ulfius]
Details (2)
- 2.7.15-2.2+b2 · amd64 · trixie
  Fixed · Fixed: 2.7.1-2
  dsa · ulfius · debian · 13
- 2.7.15-2.2+b2 · arm64 · trixie
  Fixed · Fixed: 2.7.1-2
  dsa · ulfius · debian · 13
[libulfius-dev]Fixed
Source package: [ulfius]
Details (2)
- 2.7.15-2.2+b2 · amd64 · trixie
  Fixed · Fixed: 2.7.1-2
  dsa · ulfius · debian · 13
- 2.7.15-2.2+b2 · arm64 · trixie
  Fixed · Fixed: 2.7.1-2
  dsa · ulfius · debian · 13
[uwsc]Fixed
Source package: [ulfius]
Details (2)
- 2.7.15-2.2+b2 · amd64 · trixie
  Fixed · Fixed: 2.7.1-2
  dsa · ulfius · debian · 13
- 2.7.15-2.2+b2 · arm64 · trixie
  Fixed · Fixed: 2.7.1-2
  dsa · ulfius · debian · 13

Observed: Oct 23, 2026, 6:02:28 PM UTC

References

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