CVE catalog

CVE-2026-104039

A flaw was found in SSSD. A local user can cause a…

A flaw was found in SSSD. A local user can cause a denial of service (DoS) by disrupting system authentication services. When handling Generic Security Services Application Programming Interface (GSSAPI) authentication in the Pluggable Authentication Module (PAM) responder, cached connection state is freed upon completion without clearing the reference pointer. An attacker can exploit this by sending an additional request over the same connection, causing the service to access invalid memory and unexpectedly terminate.

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, 12:41:30 AM UTC
Updated: Oct 6, 2026, 2:17:03 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.10% · Oct 27, 2026

Projects and upstream resources

[sssd][Source-reported homepage]

Reported versions and fixes

Each observation applies to its named package, distribution, and release. Distribution backports can fix a vulnerability while retaining an older upstream version number.

Version impact has not been established. The original provider fields are retained below.

Provider details and historical evidence

Original provider fields

{
  "package_releases": [
    {
      "name": "sssd",
      "status": "vulnerable",
      "release": "sid",
      "version": "2.13.1-3"
    },
    {
      "name": "sssd",
      "status": "vulnerable",
      "release": "trixie",
      "version": "2.10.1-2"
    },
    {
      "name": "sssd",
      "status": "vulnerable",
      "release": "bookworm",
      "version": "2.8.2-4+deb12u1"
    }
  ],
  "fixed_versions": [
    {
      "bug": 1150238,
      "name": "sssd",
      "type": "source",
      "origin": null,
      "release": "sid",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1150238,
      "name": "sssd",
      "type": "source",
      "origin": null,
      "release": "trixie",
      "urgency": "not yet assigned",
      "fixed_version": ""
    },
    {
      "bug": 1150238,
      "name": "sssd",
      "type": "source",
      "origin": null,
      "release": "bookworm",
      "urgency": "not yet assigned",
      "fixed_version": ""
    }
  ],
  "distribution_packages": []
}

[Debian bug #1150238]

OpenFactory catalog packages

Matching against OpenFactory catalog package versions is in progress.

[Debian 12 (Bookworm)]

[libipa-hbac0]Unknown
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]Unknown
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]Unknown
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]Unknown
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]Unknown
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]Unknown
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]Unknown
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]Unknown
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]Unknown
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]Unknown
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]Unknown
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]Unknown
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]Unknown
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]Unknown
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]Unknown
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]Unknown
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]Unknown
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]Unknown
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]Unknown
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]Unknown
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 23, 2026, 7:40:37 PM UTC

References

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