3.7

CVE-2026-0989: ibm aix Uncontrolled Recursion

CVSS: 3.7v3.1LowAnalyzed
AliasesSUSE-SU-2026:0334-1SUSE-SU-2026:0336-1SUSE-SU-2026:0391-1
Published 15-01-2026Last modified 01-09-2026
Open JSON

Vulnerability summary

CVE-2026-0989 is a low (CVSS 3.7) Uncontrolled Recursion vulnerability in ibm aix. EPSS estimates a 0.53% chance of exploitation in the next 30 days, higher than 43.5% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
25/100
0100
Medium · default modelHow is this calculated?
CVSS score
3.7/10
010
Low · v3.1 (CVE.org)
EPSS score
0.53%
0%100%
Low · +0.03 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 6 · Related 5
MGASA-2026-0027RHSA-2026:7519SUSE-SU-2026:0605-1SUSE-SU-2026:0606-1SUSE-SU-2026:20657-1SUSE-SU-2026:20707-1

Timeline

  1. 15-01-2026
    PublishedVulnerability first disclosed.
  2. 01-09-2026
    Last modifiedVulnerability information updated.

Description

A flaw was identified in the RelaxNG parser of libxml2 related to how external schema inclusions are handled. The parser does not enforce a limit on inclusion depth when resolving nested <include> directives. Specially crafted or overly complex schemas can cause excessive recursion during parsing. This may lead to stack exhaustion and application crashes, creating a denial-of-service risk.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.53%

Chance of exploitation in the next 30 days

Percentile

44%

Versus all other CVEs

30-day change

+0.03 pp

From 0.50% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.53%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (gitlab.gnome.org)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Suse14 products
  • libxml2-python&distro=SUSE Linux Enterprise Micro 5.5< 2.10.3-150500.5.35.1
  • libxml2-python&distro=SUSE Linux Enterprise Server 16.0< 2.13.8-160000.3.1
  • libxml2-python&distro=SUSE Linux Enterprise Server for SAP applications 16.0< 2.13.8-160000.3.1
  • libxml2-python&distro=SUSE Linux Micro 6.2< 2.13.8-160000.3.1
  • libxml2&distro=SUSE Linux Enterprise Micro 5.2< 2.9.7-150000.3.91.1
Opensuse6 products
  • libxml2-python&distro=openSUSE Leap 15.6< 2.10.3-150500.5.35.1
  • libxml2-python&distro=openSUSE Leap 16.0< 2.13.8-160000.3.1
  • libxml2&distro=openSUSE Leap 15.6< 2.10.3-150500.5.35.1
  • libxml2&distro=openSUSE Leap 16.0< 2.13.8-160000.3.1
  • libxml2&distro=openSUSE Tumbleweed< 2.14.5-2.1
Redhat4 products
Ibm2 products
  • aix≥ 7.2.5, < 7.2.5.12 | ≥ 7.3.2, < 7.3.3.3 | 7.3.4
  • vios≥ 4.1.0, < 4.1.1.30 | 4.1.2.0
Debian1 product
  • libxml2< 2.9.14+dfsg-1.3~deb12u6 | < 2.12.7+dfsg+really2.9.14-2.1+deb13u3 | < 2.15.2+dfsg-0.1
Ubuntu1 product
  • libxml2< 2.9.1+dfsg1-3ubuntu4.13+esm11 | < 2.9.3+dfsg1-1ubuntu0.7+esm12 | < 2.9.4+dfsg1-6.1ubuntu1.9+esm7 | < 2.9.10+dfsg-5ubuntu0.20.04.10+esm4 | < 2.9.13+dfsg-1ubuntu0.11 | < 2.9.14+dfsg-1.3ubuntu3.7 | < 2.14.5+dfsg-0.2ubuntu0.1
Xmlsoft1 product

7 vendors · 29 products

References

19 links
Show all 19 references