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VulnerabilityPublished

CVE-2026-127101: 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

Currently, no mitigation is available or meets Red Hat's criteria for ease of use, applicability, or stability. Users should monitor Red Hat advisories for updates and consider restricting local access to the PAM responder socket where feasible. Red Hat is assessing affected builds and potential fixes.

Description

A vulnerability in SSSD's PAM responder in Red Hat Enterprise Linux 10 allows a local attacker with access to the PAM responder socket to cause a denial of service by sending an authentication request without negotiating the client protocol version. This triggers a NULL pointer dereference, crashing the responder and disrupting SSSD-backed authentication. There is no impact on confidentiality or integrity.

References

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