CVE-2026-127101: Red Hat Enterprise Linux 10 · NULL Pointer Dereference
Affects Red Hat Enterprise Linux 10Source CVE Database V5
Not known to be exploited · CVSS 5.5 Medium.
Data as of 12 Nov 2026, 18:04 UTC
Thin evidence
One scorer or none| CNA (redhat) | CVSS 3.1 | 5.5 |
|---|
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 12 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10sssd | Affected– | Fixed in– |
| Red Hat Enterprise Linux 6sssd | Affected– | Fixed in– |
| Red Hat Enterprise Linux 7sssd | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8sssd | Affected– | Fixed in– |
| Red Hat Enterprise Linux 9sssd | Affected– | Fixed in– |
| Red Hat OpenShift Container Platform 4openshift/ose-rhel-coreos-8 | Affected– | 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.