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VulnerabilityPublished

CVE-2026-127100: Red Hat Enterprise Linux 10 · NULL Pointer Dereference

Affects Red Hat Enterprise Linux 10Source CVE Database V5

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Not known to be exploited · CVSS 5.5 Medium.

Data as of 12 Nov 2026, 18:04 UTC

CVSS 3.1 base score
5.5Medium
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (redhat)CVSS 3.15.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 12 Nov 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 12 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hat Enterprise Linux 10sssdAffected–Fixed in–
Red Hat Enterprise Linux 6sssdAffected–Fixed in–
Red Hat Enterprise Linux 7sssdAffected–Fixed in–
Red Hat Enterprise Linux 8sssdAffected–Fixed in–
Red Hat Enterprise Linux 9sssdAffected–Fixed in–
Red Hat OpenShift Container Platform 4openshift/ose-rhel-coreos-8Affected–Fixed in–

AI-suggested

Red Hat currently states that no mitigation is available or that existing options do not meet their criteria for ease of use, applicability, or stability. Users should monitor the Red Hat advisory for updates.

Description

CVE-2026-127100 is a vulnerability in the SSSD PAM responder on Red Hat Enterprise Linux 10 builds with the JSON PAM extension enabled. A local attacker can cause a NULL pointer dereference by submitting a crafted authentication request with a non-string OAuth2 code value. This leads to termination of the PAM responder and disrupts SSSD-backed authentication, resulting in a denial of service. No confidentiality or integrity impacts are established. The vulnerability is rated moderate by Red Hat, with affected builds starting from RHEL 9.8 and 10.2 where the JSON PAM extension is enabled. No mitigation or patch is currently available that meets Red Hat's criteria for ease of use and deployment.

References

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