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TI-2026-81414 Aliases CVE-2026-109089GHSA-xv92-4rh8-wp3r

Heap buffer overflow in libXi when handling DEVICE_RESOLUTION

Priority LOW 34CWE-122Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
High
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 4 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-122 and the CVSS impact.

Summary

X.Org libXi before 1.8.4 is affected. A heap buffer overflow when handling DEVICE_RESOLUTION (CWE-122) lets a malicious X server overflow a heap buffer. The attack requires user interaction and a malicious X server, and it has high impact on confidentiality, integrity and availability.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

Description from the CNA

A buffer overflow when handling DEVICE_RESOLUTION in libXi before 1.8.4 could overflow a heap, triggered by a malicious X server.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00258 17th percentileScored 2026-11-07
Fix Partial libXi (X.Org): 1.8.4Red Hat: 4 advisoriesRed Hat: 4 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
x.orglibXibefore 1.8.41.8.4Patch availableCNA
  • libXi Vendorx.org Affected before 1.8.4 Fixed in 1.8.4 Patch available CNA

Remediation

Upgrade libXi to 1.8.4. Red Hat fixes it in Red Hat Enterprise Linux AppStream 8, 9 and 10 through RHSA-2026:93438, RHSA-2026:93439 and RHSA-2026:93441, and in Red Hat Hardened Images through RHSA-2026:86772. Red Hat Enterprise Linux 7 is affected and Red Hat lists no available plan for it.

Written with Claude Haiku 5.5 from the sources below · 2026-11-04

  • Fix · CNA libXi (X.Org) Fixed in 1.8.4

Red Hat 4 advisories

  • RHSA-2026:93439 Released 2026-11-02 · Red Hat rating Important
    libXi security update
    • Red Hat Enterprise Linux AppStream (v. 9) libXi-1.7.10-8.el9_8.3, libXi-devel-1.7.10-8.el9_8.3
  • RHSA-2026:93438 Released 2026-11-02 · Red Hat rating Important
    libXi security update
    • Red Hat Enterprise Linux AppStream (v. 8) libXi-1.7.10-4.el8_10, libXi-devel-1.7.10-4.el8_10
  • RHSA-2026:93441 Released 2026-11-02 · Red Hat rating Important
    libXi security update
    • Red Hat Enterprise Linux AppStream (v. 10) libXi-1.8.1-7.el10_2.3, libXi-devel-1.8.1-7.el10_2.3
Show 1 more Red Hat advisories
  • RHSA-2026:86772 Released 2026-10-21 · Red Hat rating Important
    Red Hat Hardened Images RPMs bug fix and enhancement update
    • Red Hat Hardened Images libXi-1.8.4-1.hum1@aarch64, libXi-1.8.4-1.hum1@s390x, libXi-1.8.4-1.hum1@src +4

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    X.Org libXi 1.8.4

    2 records Highest priority Priority LOW 2 LOW

    Other records, highest priority first

    • TI-2026-81426 Heap overflow in libXi XGetDeviceControl DEVICE_ENABLE replyPriority LOW 34
    Show all 2 records →

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 7AffectedNo fix yet
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:93441
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2026:93438
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:93439
Red Hat Hardened ImagesFixed RHSA-2026:86772
Not affected: 1 product
  • Red Hat Enterprise Linux 6

Timeline

  1. 2026-10-27 Threatist record created from CVE-2026-109089
  2. 2026-10-27 Alias added: GHSA-xv92-4rh8-wp3r
  3. 2026-10-28 Priority changed: MEDIUM → LOW
  4. 2026-11-02 Affected versions changed · Red Hat
  5. 2026-11-02 CVSS score added · Red Hat
  6. 2026-11-02 Fix available: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux AppStream (v. 8), Red Hat Enterprise Linux AppStream (v. 9) · Red Hat
  7. 2026-11-03 Fix available: RHSA-2026:93441 · Red Hat
  8. 2026-11-03 Fix available: RHSA-2026:93439 · Red Hat
  9. 2026-11-03 Fix available: RHSA-2026:93438 · Red Hat
  10. 2026-11-03 Fix available: RHSA-2026:86772 · Red Hat
  11. 2026-11-03 Fix available: Red Hat Hardened Images · Red Hat
  12. 2026-11-04 CISA SSVC decision points changed

References

Patch 1

  • TI-2022-25238 In X.Org X server 20.11 through 21.1.16, when a client application uses easystroke for… CVSS 3.1HIGH 7.7
  • TI-1999-00519 An X server's access control is disabled (e.g. CVSS 2.0HIGH 10.0
  • TI-2021-11657 LookupCol.c in X.Org X through X11R7.7 and libX11 before 1.7.1 might allow remote… CVSS 3.1CRITICAL 9.8
  • TI-2018-10465 An issue was discovered in libX11 through 1.6.5. CVSS 3.0CRITICAL 9.8
  • TI-2004-00826 Multiple vulnerabilities in libXpm for 6.8.1 and earlier, as used in XFree86 and other… CVSS 2.0HIGH 10.0
  • TI-2016-08240 Multiple integer overflows in libXpm before 3.5.12, when a program requests parsing XPM… CVSS 3.0CRITICAL 9.8
See all 206 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences