Red Hat Security Advisory: Red Hat Hardened Images RPMs Security Update
Affects Red HatSource GCVE Database
Not known to be exploited · CVSS 5.5 Medium.
Data as of 5 Nov 2026, 00:01 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 5 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 updated libxml2 RPMs (version 2.15.3-0.1.3.hum1) that fix this vulnerability. Users should apply these updates to Red Hat Hardened Images to remediate the issue. Until patched, avoid processing untrusted XML catalog files with applications linked against libxml2. Restrict applications from loading external XML catalogs or ensure only trusted catalogs are used.
Description
A vulnerability in libxml2's XML catalog parsing can cause a denial of service (DoS) due to a NULL pointer dereference when a nextCatalog element lacks its mandatory catalog attribute. This flaw requires processing a specially crafted XML catalog by an application using libxml2, leading to application crashes. The issue affects Red Hat Hardened Images RPMs and has been addressed in updated libxml2 packages.
References
- access.redhat.com/errata/RHSA-2026:57604 (opens in a new tab)
- access.redhat.com/security/cve/CVE-2026-76781 (opens in a new tab)
- access.redhat.com/security/updates/classification/ (opens in a new tab)
- images.redhat.com (opens in a new tab)
- security.access.redhat.com/data/csaf/v2/advisories/2026/rhsa-2026_57604.json (opens in a new tab)