CVE catalog

CVE-2026-6245

Severity: Medium · CVSS 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Published: Apr 15, 2026, 6:20:05 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.14% · Oct 25, 2026

A flaw was found in the System Security Services Daemon (SSSD). The pam_passkey_child_read_data() function within the PAM passkey responder fails to properly handle raw bytes received from a pipe. Because the data is treated as a NUL-terminated C string without explicit termination, it results in an out-of-bounds read when processed by functions like snprintf(). A local attacker could potentially trigger this vulnerability by initiating a crafted passkey authentication request, causing the SSSD PAM responder to crash, resulting in a local Denial of Service (DoS).

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	sssd	sid	`2.13.1-3`	fixed
Debian	sssd	trixie	`2.10.1-2`	vulnerable
Debian	sssd	bookworm	`2.8.2-4+deb12u1`	not affected
Cpe	sssd	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	libipa-hbac-dev	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	libipa-hbac0t64	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	libnss-sss	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	libpam-sss	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	libsss-certmap-dev	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	libsss-certmap0	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	libsss-idmap-dev	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	libsss-idmap0	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	libsss-nss-idmap-dev	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	libsss-nss-idmap0	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	libsss-sudo	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	python3-libipa-hbac	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	python3-libsss-nss-idmap	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	python3-sss	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	sssd-ad	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	sssd-ad-common	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	sssd-common	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	sssd-dbus	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	sssd-idp	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	sssd-ipa	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	sssd-kcm	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	sssd-krb5	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	sssd-krb5-common	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	sssd-ldap	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	sssd-passkey	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	sssd-proxy	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	sssd-tools	Not reported	`2.9.4-1.1ubuntu6.5`	fixed
Cpe	sssd	Not reported	Not reported	not affected
Cpe	sssd	Not reported	Not reported	unknown
Cpe	openshift_container_platform	Not reported	Not reported	unknown
Cpe	enterprise_linux	Not reported	Not reported	unknown
Ubuntu	sssd	24.04	`2.9.1-2ubuntu2`	vulnerable
Ubuntu	sssd	24.04	`2.9.1-2ubuntu3`	vulnerable
Ubuntu	sssd	24.04	`2.9.2-1ubuntu2`	vulnerable
Ubuntu	sssd	24.04	`2.9.4-1ubuntu1`	vulnerable
Ubuntu	sssd	24.04	`2.9.4-1.1ubuntu3`	vulnerable
Ubuntu	sssd	24.04	`2.9.4-1.1ubuntu5`	vulnerable
Ubuntu	sssd	24.04	`2.9.4-1.1ubuntu6`	vulnerable
Ubuntu	sssd	24.04	`2.9.4-1.1ubuntu6.1`	vulnerable
Ubuntu	sssd	24.04	`2.9.4-1.1ubuntu6.2`	vulnerable
Ubuntu	sssd	24.04	`2.9.4-1.1ubuntu6.3`	vulnerable
Ubuntu	sssd	24.04	`2.9.4-1.1ubuntu6.4`	vulnerable
Ubuntu	sssd	24.04	`2.9.4-1.1ubuntu6.5`	fixed
Ubuntu	sssd	25.10	`2.10.1-2ubuntu4`	vulnerable
Ubuntu	sssd	25.10	`2.10.1-2ubuntu5`	vulnerable
Ubuntu	sssd	25.10	`2.10.1-2ubuntu5.1`	vulnerable
Ubuntu	sssd	25.10	`2.10.1-2ubuntu5.2`	fixed
Ubuntu	sssd	26.04	`2.10.1-2ubuntu5`	vulnerable
Ubuntu	sssd	26.04	`2.10.1-2ubuntu7`	vulnerable
Ubuntu	sssd	26.04	`2.12.0-1ubuntu3`	vulnerable
Ubuntu	sssd	26.04	`2.12.0-1ubuntu4`	vulnerable
Ubuntu	sssd	26.04	`2.12.0-1ubuntu5`	vulnerable
Ubuntu	sssd	26.04	`2.12.0-1ubuntu5.1`	fixed
Ubuntu	sssd	24.04	`2.9.1-2ubuntu2`	vulnerable
Ubuntu	sssd	24.04	`2.9.1-2ubuntu3`	vulnerable
Ubuntu	sssd	24.04	`2.9.2-1ubuntu2`	vulnerable
Ubuntu	sssd	24.04	`2.9.4-1ubuntu1`	vulnerable
Ubuntu	sssd	24.04	`2.9.4-1.1ubuntu3`	vulnerable
Ubuntu	sssd	24.04	`2.9.4-1.1ubuntu5`	vulnerable
Ubuntu	sssd	24.04	`2.9.4-1.1ubuntu6`	vulnerable
Ubuntu	sssd	24.04	`2.9.4-1.1ubuntu6.1`	vulnerable
Ubuntu	sssd	24.04	`2.9.4-1.1ubuntu6.2`	vulnerable
Ubuntu	sssd	24.04	`2.9.4-1.1ubuntu6.3`	vulnerable
Ubuntu	sssd	24.04	`2.9.4-1.1ubuntu6.4`	vulnerable
Ubuntu	sssd	24.04	`2.9.4-1.1ubuntu6.5`	fixed
Ubuntu	sssd	25.10	`2.10.1-2ubuntu4`	vulnerable
Ubuntu	sssd	25.10	`2.10.1-2ubuntu5`	vulnerable
Ubuntu	sssd	25.10	`2.10.1-2ubuntu5.1`	vulnerable
Ubuntu	sssd	25.10	`2.10.1-2ubuntu5.2`	fixed
Ubuntu	sssd	26.04	`2.10.1-2ubuntu5`	vulnerable
Ubuntu	sssd	26.04	`2.10.1-2ubuntu7`	vulnerable
Ubuntu	sssd	26.04	`2.12.0-1ubuntu3`	vulnerable
Ubuntu	sssd	26.04	`2.12.0-1ubuntu4`	vulnerable
Ubuntu	sssd	26.04	`2.12.0-1ubuntu5`	vulnerable
Ubuntu	sssd	26.04	`2.12.0-1ubuntu5.1`	fixed
Opensuse	sssd	tumbleweed	`2.13.0-1.1`	fixed

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	sssd	source	sid	`2.13.1-1`	not yet assigned	Not reported	[1134269]
Debian	sssd	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1134269]
Debian	sssd	source	bookworm	`Not affected`	unimportant	Not reported	[1134269]
Cpe	sssd	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	libipa-hbac-dev	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	libipa-hbac0t64	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	libnss-sss	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	libpam-sss	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	libsss-certmap-dev	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	libsss-certmap0	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	libsss-idmap-dev	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	libsss-idmap0	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	libsss-nss-idmap-dev	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	libsss-nss-idmap0	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	libsss-sudo	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	python3-libipa-hbac	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	python3-libsss-nss-idmap	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	python3-sss	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	sssd-ad	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	sssd-ad-common	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	sssd-common	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	sssd-dbus	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	sssd-idp	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	sssd-ipa	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	sssd-kcm	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	sssd-krb5	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	sssd-krb5-common	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	sssd-ldap	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	sssd-passkey	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	sssd-proxy	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Cpe	sssd-tools	cpe	Not reported	`2.9.4-1.1ubuntu6.5`	Not reported	Not reported	Not reported
Ubuntu	sssd	deb	24.04	`2.9.4-1.1ubuntu6.5`	Not reported	USN-8355-1	Not reported
Ubuntu	sssd	deb	25.10	`2.10.1-2ubuntu5.2`	Not reported	USN-8355-1	Not reported
Ubuntu	sssd	deb	26.04	`2.12.0-1ubuntu5.1`	Not reported	USN-8355-1	Not reported
Ubuntu	sssd	deb	24.04	`2.9.4-1.1ubuntu6.5`	Not reported	UBUNTU-CVE-2026-6245	Not reported
Ubuntu	sssd	deb	25.10	`2.10.1-2ubuntu5.2`	Not reported	UBUNTU-CVE-2026-6245	Not reported
Ubuntu	sssd	deb	26.04	`2.12.0-1ubuntu5.1`	Not reported	UBUNTU-CVE-2026-6245	Not reported
Opensuse	sssd	rpm	tumbleweed	`2.13.0-1.1`	Not reported	OPENSUSE-SU-2026:10659-1	Not reported

[Debian bug #1134269]

Notes

[trixie] sssd: Minor issue

OpenFactory catalog packages

[Debian 13 (Trixie)]

[libipa-hbac0t64]Affected
Source package: [sssd]
Details (2)
- 2.10.1-2+b1 · amd64 · trixie
  Affected
  nvd · sssd · debian · 13
- 2.10.1-2+b1 · arm64 · trixie
  Affected
  nvd · sssd · debian · 13
[libipa-hbac-dev]Affected
Source package: [sssd]
Details (2)
- 2.10.1-2+b1 · amd64 · trixie
  Affected
  nvd · sssd · debian · 13
- 2.10.1-2+b1 · arm64 · trixie
  Affected
  nvd · sssd · debian · 13
[libnss-sss]Affected
Source package: [sssd]
Details (2)
- 2.10.1-2+b1 · amd64 · trixie
  Affected
  nvd · sssd · debian · 13
- 2.10.1-2+b1 · arm64 · trixie
  Affected
  nvd · sssd · debian · 13
[libpam-sss]Affected
Source package: [sssd]
Details (2)
- 2.10.1-2+b1 · amd64 · trixie
  Affected
  nvd · sssd · debian · 13
- 2.10.1-2+b1 · arm64 · trixie
  Affected
  nvd · sssd · debian · 13
[libsss-certmap0]Affected
Source package: [sssd]
Details (2)
- 2.10.1-2+b1 · amd64 · trixie
  Affected
  nvd · sssd · debian · 13
- 2.10.1-2+b1 · arm64 · trixie
  Affected
  nvd · sssd · debian · 13
[libsss-certmap-dev]Affected
Source package: [sssd]
Details (2)
- 2.10.1-2+b1 · amd64 · trixie
  Affected
  nvd · sssd · debian · 13
- 2.10.1-2+b1 · arm64 · trixie
  Affected
  nvd · sssd · debian · 13
[libsss-idmap0]Affected
Source package: [sssd]
Details (2)
- 2.10.1-2+b1 · amd64 · trixie
  Affected
  nvd · sssd · debian · 13
- 2.10.1-2+b1 · arm64 · trixie
  Affected
  nvd · sssd · debian · 13
[libsss-idmap-dev]Affected
Source package: [sssd]
Details (2)
- 2.10.1-2+b1 · amd64 · trixie
  Affected
  nvd · sssd · debian · 13
- 2.10.1-2+b1 · arm64 · trixie
  Affected
  nvd · sssd · debian · 13
[libsss-nss-idmap0]Affected
Source package: [sssd]
Details (2)
- 2.10.1-2+b1 · amd64 · trixie
  Affected
  nvd · sssd · debian · 13
- 2.10.1-2+b1 · arm64 · trixie
  Affected
  nvd · sssd · debian · 13
[libsss-nss-idmap-dev]Affected
Source package: [sssd]
Details (2)
- 2.10.1-2+b1 · amd64 · trixie
  Affected
  nvd · sssd · debian · 13
- 2.10.1-2+b1 · arm64 · trixie
  Affected
  nvd · sssd · debian · 13
[libsss-sudo]Affected
Source package: [sssd]
Details (2)
- 2.10.1-2+b1 · amd64 · trixie
  Affected
  nvd · sssd · debian · 13
- 2.10.1-2+b1 · arm64 · trixie
  Affected
  nvd · sssd · debian · 13
[python3-libipa-hbac]Affected
Source package: [sssd]
Details (2)
- 2.10.1-2+b1 · amd64 · trixie
  Affected
  nvd · sssd · debian · 13
- 2.10.1-2+b1 · arm64 · trixie
  Affected
  nvd · sssd · debian · 13
[python3-libsss-nss-idmap]Affected
Source package: [sssd]
Details (2)
- 2.10.1-2+b1 · amd64 · trixie
  Affected
  nvd · sssd · debian · 13
- 2.10.1-2+b1 · arm64 · trixie
  Affected
  nvd · sssd · debian · 13
[python3-sss]Affected
Source package: [sssd]
Details (2)
- 2.10.1-2+b1 · amd64 · trixie
  Affected
  nvd · sssd · debian · 13
- 2.10.1-2+b1 · arm64 · trixie
  Affected
  nvd · sssd · debian · 13
[sssd]Affected
Source package: [sssd]
Details (2)
- 2.10.1-2+b1 · amd64 · trixie
  Affected
  nvd · sssd · debian · 13
- 2.10.1-2+b1 · arm64 · trixie
  Affected
  nvd · sssd · debian · 13
[sssd-ad]Affected
Source package: [sssd]
Details (2)
- 2.10.1-2+b1 · amd64 · trixie
  Affected
  nvd · sssd · debian · 13
- 2.10.1-2+b1 · arm64 · trixie
  Affected
  nvd · sssd · debian · 13
[sssd-ad-common]Affected
Source package: [sssd]
Details (2)
- 2.10.1-2+b1 · amd64 · trixie
  Affected
  nvd · sssd · debian · 13
- 2.10.1-2+b1 · arm64 · trixie
  Affected
  nvd · sssd · debian · 13
[sssd-common]Affected
Source package: [sssd]
Details (2)
- 2.10.1-2+b1 · amd64 · trixie
  Affected
  nvd · sssd · debian · 13
- 2.10.1-2+b1 · arm64 · trixie
  Affected
  nvd · sssd · debian · 13
[sssd-dbus]Affected
Source package: [sssd]
Details (2)
- 2.10.1-2+b1 · amd64 · trixie
  Affected
  nvd · sssd · debian · 13
- 2.10.1-2+b1 · arm64 · trixie
  Affected
  nvd · sssd · debian · 13
[sssd-idp]Affected
Source package: [sssd]
Details (2)
- 2.10.1-2+b1 · amd64 · trixie
  Affected
  nvd · sssd · debian · 13
- 2.10.1-2+b1 · arm64 · trixie
  Affected
  nvd · sssd · debian · 13

Next results

Observed: Oct 23, 2026, 10:34:17 PM UTC

References

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