CVE-2026-76781: Red Hat Hardened Images · NULL Pointer Dereference
Affects Red Hat Hardened ImagesSource CVE Database V5
Not known to be exploited · CVSS 5.5 Medium.
Data as of 1 Nov 2026, 11:17 UTC
Thin evidence
One scorer or none| CNA (redhat) | CVSS 3.1 | 5.5 |
|---|
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 17 Sep 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 1 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Hardened Imageslibxml2-main | Affected– | Fixed in– |
| Red Hat Enterprise Linux 10libxml2 | Affected– | Fixed in– |
| Red Hat Enterprise Linux 10podman | Affected– | Fixed in– |
| Red Hat Enterprise Linux 6libxml2 | Affected– | Fixed in– |
| Red Hat Enterprise Linux 7libxml2 | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8container-tools:rhel8/podman | Affected– | Fixed in– |
AI-suggested
Red Hat has released a security update for libxml2 in Red Hat Hardened Images (libxml2-2.15.3-0.1.3.hum1) that fixes this vulnerability. Users should apply this update to remediate the issue. Until patched, avoid processing untrusted XML catalog files and restrict applications to load only trusted catalogs. Exercise caution when handling XML documents from untrusted sources to prevent application crashes.
Description
A vulnerability in libxml2 used by Red Hat Hardened Images allows a local user or attacker to cause a denial of service by triggering a NULL pointer dereference during XML catalog parsing. This happens when a nextCatalog element is missing its required catalog attribute, causing the application to crash. The flaw requires user interaction and specially crafted XML input. A security update is available that addresses this issue.
References
- access.redhat.com/security/cve/CVE-2026-76781 (opens in a new tab)
- bugzilla.redhat.com/show_bug.cgi?id=2519776 (opens in a new tab)
- gitlab.gnome.org/GNOME/libxml2/-/commit/c6324894 (opens in a new tab)
- gitlab.gnome.org/GNOME/libxml2/-/merge_requests/442 (opens in a new tab)
- access.redhat.com/errata/RHSA-2026:57604 (opens in a new tab)