CVE catalog

CVE-2026-88252

Severity: Medium · CVSS 4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
Published: Oct 6, 2026, 4:40:55 PM UTC
Updated: Oct 6, 2026, 6:16:56 PM UTC
Source: [NVD] · [CVE record]
EPSS: 0.13% · Oct 25, 2026

A flaw was found in sssd. A local user can cause a Denial of Service (DoS) by exhausting the responder service's available file descriptors (system handles used for open connections). By opening and maintaining many concurrent connections to a responder socket while continuing to queue new connection attempts, an attacker can trigger an unthrottled retry loop. This condition leads to high CPU utilization and stalls the service, preventing legitimate identity and authentication requests from being processed.

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`	vulnerable
Debian	sssd	trixie	`2.10.1-2`	vulnerable
Debian	sssd	bookworm	`2.8.2-4+deb12u1`	vulnerable
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	pro	`2.2.0-4ubuntu1`	vulnerable
Ubuntu	sssd	pro	`2.2.2-1`	vulnerable
Ubuntu	sssd	pro	`2.2.2-1ubuntu1`	vulnerable
Ubuntu	sssd	pro	`2.2.3-1.1ubuntu1`	vulnerable
Ubuntu	sssd	pro	`2.2.3-2`	vulnerable
Ubuntu	sssd	pro	`2.2.3-3`	vulnerable
Ubuntu	sssd	pro	`2.2.3-3ubuntu0.1`	vulnerable
Ubuntu	sssd	pro	`2.2.3-3ubuntu0.2`	vulnerable
Ubuntu	sssd	pro	`2.2.3-3ubuntu0.3`	vulnerable
Ubuntu	sssd	pro	`2.2.3-3ubuntu0.4`	vulnerable
Ubuntu	sssd	pro	`2.2.3-3ubuntu0.6`	vulnerable
Ubuntu	sssd	pro	`2.2.3-3ubuntu0.7`	vulnerable
Ubuntu	sssd	pro	`2.2.3-3ubuntu0.8`	vulnerable
Ubuntu	sssd	pro	`2.2.3-3ubuntu0.9`	vulnerable
Ubuntu	sssd	pro	`2.2.3-3ubuntu0.10`	vulnerable
Ubuntu	sssd	pro	`2.2.3-3ubuntu0.11`	vulnerable
Ubuntu	sssd	pro	`2.2.3-3ubuntu0.12`	vulnerable
Ubuntu	sssd	pro	`2.2.3-3ubuntu0.13`	vulnerable
Ubuntu	sssd	pro	`2.2.3-3ubuntu0.13+esm1`	vulnerable
Ubuntu	sssd	22.04	`2.4.1-2ubuntu4`	vulnerable
Ubuntu	sssd	22.04	`2.5.2-4ubuntu1`	vulnerable
Ubuntu	sssd	22.04	`2.5.2-4ubuntu3`	vulnerable
Ubuntu	sssd	22.04	`2.5.2-4ubuntu4`	vulnerable
Ubuntu	sssd	22.04	`2.6.1-1ubuntu3`	vulnerable
Ubuntu	sssd	22.04	`2.6.3-1ubuntu3`	vulnerable
Ubuntu	sssd	22.04	`2.6.3-1ubuntu3.1`	vulnerable
Ubuntu	sssd	22.04	`2.6.3-1ubuntu3.2`	vulnerable
Ubuntu	sssd	22.04	`2.6.3-1ubuntu3.3`	vulnerable
Ubuntu	sssd	22.04	`2.6.3-1ubuntu3.4`	vulnerable
Ubuntu	sssd	22.04	`2.6.3-1ubuntu3.5`	vulnerable
Ubuntu	sssd	22.04	`2.6.3-1ubuntu3.6`	vulnerable
Ubuntu	sssd	22.04	`2.6.3-1ubuntu3.8`	vulnerable
Ubuntu	sssd	22.04	`2.6.3-1ubuntu3.9`	vulnerable
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`	vulnerable
Ubuntu	sssd	24.04	`2.9.4-1.1ubuntu6.6`	vulnerable
Ubuntu	sssd	24.04	`2.9.4-1.1ubuntu6.7`	vulnerable
Ubuntu	sssd	24.04	`2.9.4-1.1ubuntu6.8`	vulnerable
Ubuntu	sssd	26.10	`2.12.0-1ubuntu5`	vulnerable
Ubuntu	sssd	26.10	`2.12.0-4ubuntu1`	vulnerable
Ubuntu	sssd	26.10	`2.12.0-4ubuntu2`	vulnerable
Ubuntu	sssd	26.10	`2.12.0-4ubuntu3`	vulnerable
Ubuntu	sssd	26.10	`2.12.0-4ubuntu4`	vulnerable
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`	vulnerable
Ubuntu	sssd	26.04	`2.12.0-1ubuntu5.2`	vulnerable
Ubuntu	sssd	26.04	`2.12.0-1ubuntu5.3`	vulnerable
Ubuntu	sssd	26.04	`2.12.0-1ubuntu5.4`	vulnerable
Ubuntu	sssd	26.04	`2.12.0-1ubuntu5.5`	vulnerable

Fixed-version evidence

Distribution	Package	Type	Release	Fixed version	Urgency	Origin	Bugs
Debian	sssd	source	sid	`(unfixed)`	not yet assigned	Not reported	[1150238]
Debian	sssd	source	trixie	`(unfixed)`	not yet assigned	Not reported	[1150238]
Debian	sssd	source	bookworm	`(unfixed)`	not yet assigned	Not reported	[1150238]

[Debian bug #1150238]

Notes

[trixie] sssd: Minor issue

OpenFactory catalog packages

[Debian 12 (Bookworm)]

[libipa-hbac0]Affected
Source package: [sssd]
Details (2)
- 2.8.2-4+deb12u1 · amd64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
- 2.8.2-4+deb12u1 · arm64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
[libipa-hbac-dev]Affected
Source package: [sssd]
Details (2)
- 2.8.2-4+deb12u1 · amd64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
- 2.8.2-4+deb12u1 · arm64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
[libnss-sss]Affected
Source package: [sssd]
Details (2)
- 2.8.2-4+deb12u1 · amd64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
- 2.8.2-4+deb12u1 · arm64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
[libpam-sss]Affected
Source package: [sssd]
Details (2)
- 2.8.2-4+deb12u1 · amd64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
- 2.8.2-4+deb12u1 · arm64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
[libsss-certmap0]Affected
Source package: [sssd]
Details (2)
- 2.8.2-4+deb12u1 · amd64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
- 2.8.2-4+deb12u1 · arm64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
[libsss-certmap-dev]Affected
Source package: [sssd]
Details (2)
- 2.8.2-4+deb12u1 · amd64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
- 2.8.2-4+deb12u1 · arm64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
[libsss-idmap0]Affected
Source package: [sssd]
Details (2)
- 2.8.2-4+deb12u1 · amd64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
- 2.8.2-4+deb12u1 · arm64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
[libsss-idmap-dev]Affected
Source package: [sssd]
Details (2)
- 2.8.2-4+deb12u1 · amd64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
- 2.8.2-4+deb12u1 · arm64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
[libsss-nss-idmap0]Affected
Source package: [sssd]
Details (2)
- 2.8.2-4+deb12u1 · amd64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
- 2.8.2-4+deb12u1 · arm64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
[libsss-nss-idmap-dev]Affected
Source package: [sssd]
Details (2)
- 2.8.2-4+deb12u1 · amd64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
- 2.8.2-4+deb12u1 · arm64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
[libsss-simpleifp0]Affected
Source package: [sssd]
Details (2)
- 2.8.2-4+deb12u1 · amd64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
- 2.8.2-4+deb12u1 · arm64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
[libsss-simpleifp-dev]Affected
Source package: [sssd]
Details (2)
- 2.8.2-4+deb12u1 · amd64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
- 2.8.2-4+deb12u1 · arm64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
[libsss-sudo]Affected
Source package: [sssd]
Details (2)
- 2.8.2-4+deb12u1 · amd64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
- 2.8.2-4+deb12u1 · arm64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
[python3-libipa-hbac]Affected
Source package: [sssd]
Details (2)
- 2.8.2-4+deb12u1 · amd64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
- 2.8.2-4+deb12u1 · arm64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
[python3-libsss-nss-idmap]Affected
Source package: [sssd]
Details (2)
- 2.8.2-4+deb12u1 · amd64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
- 2.8.2-4+deb12u1 · arm64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
[python3-sss]Affected
Source package: [sssd]
Details (2)
- 2.8.2-4+deb12u1 · amd64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
- 2.8.2-4+deb12u1 · arm64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
[sssd]Affected
Details (2)
- 2.8.2-4+deb12u1 · amd64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
- 2.8.2-4+deb12u1 · arm64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
[sssd-ad]Affected
Source package: [sssd]
Details (2)
- 2.8.2-4+deb12u1 · amd64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
- 2.8.2-4+deb12u1 · arm64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
[sssd-ad-common]Affected
Source package: [sssd]
Details (2)
- 2.8.2-4+deb12u1 · amd64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
- 2.8.2-4+deb12u1 · arm64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
[sssd-common]Affected
Source package: [sssd]
Details (2)
- 2.8.2-4+deb12u1 · amd64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12
- 2.8.2-4+deb12u1 · arm64 · bookworm
  Affected
  nvd · sssd · debian · bookworm; nvd · sssd · debian · 12

Next results

Observed: Oct 25, 2026, 6:46:15 AM UTC

References

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