CVE catalog

CVE-2026-104034

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 5, 2026, 11:29:37 PM UTC
Updated: Oct 6, 2026, 1:16:34 AM UTC
Source: [NVD] · [CVE record]
EPSS: 0.09% · Oct 25, 2026

A flaw was found in SSSD. A use-after-free vulnerability exists in the Kerberos Credential Manager (KCM) responder during Kerberos ticket-granting ticket (TGT) renewal, where a deferred callback accesses memory that has already been released. An authenticated local user with a renewable Kerberos ticket can trigger this issue on systems configured with KCM renewal, causing the KCM responder service to crash and resulting in a 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`	vulnerable
Debian	sssd	trixie	`2.10.1-2`	vulnerable
Debian	sssd	bookworm	`2.8.2-4+deb12u1`	vulnerable

Fixed-version evidence

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

[Debian bug #1150238]

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

Next results

Observed: Oct 23, 2026, 7:40:38 PM UTC

References

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