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CVE-2026-93545· NVD / CVE Program· CNA suse

Out-of-bounds read in libXi's XListInputDevices()

An out-of-bounds read in libXi's XListInputDevices() in libXi before 1.8.4 could be used by malicious X servers to crash an attached X client.

MediumCVSS 6.5 · v3.1—No exploit Fix available
Published
Sep 24, 2026
Updated
Sep 24, 2026
EPSS
0.2% · 9th percentile
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Report tools

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Action score

26

Monitor

Low priority for now.

CVSS
26 / 40 · 6.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · suse
6.5
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Affected systems

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (suse). Independent of NVD's CPE analysis and usually ahead of it.

  • x.org libXi

    • before 1.8.4affected · rpm

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12libxiall versions—
openSUSE:TumbleweedlibXibefore 1.8.3-2.11.8.3-2.1
Red Hat:hummingbird:1libXibefore 0:1.8.3-2.1.hum10:1.8.3-2.1.hum1
Red Hat:hummingbird:1libXi-develbefore 0:1.8.3-2.1.hum10:1.8.3-2.1.hum1

Same product

x.org: all records

Other highest-scoring records for the same primary product.

  • CVE-2016-7946X.org libXi before 1.7.7 allows remote X servers to cause a denial of service (infinite loop) via vectors involving length fields.
    31Monitor
  • CVE-2016-7945Multiple integer overflows in X.org libXi before 1.7.7 allow remote X servers to cause a denial of service (out-of-bounds memory access or i
    31Monitor
  • CVE-2026-93543Out-of-bounds read in libXi's XI2 class parser
    29Monitor
  • CVE-2013-1998Multiple buffer overflows in X.org libXi 1.7.1 and earlier allow X servers to cause a denial of service (crash) and possibly execute arbitra
    28Monitor
  • CVE-2013-1995X.org libXi 1.7.1 and earlier allows X servers to trigger allocation of insufficient memory and a buffer overflow via vectors related to an
    28Monitor
  • CVE-2013-1984Multiple integer overflows in X.org libXi 1.7.1 and earlier allow X servers to trigger allocation of insufficient memory and a buffer overfl
    28Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
x.org libXi1.8.4Vendor (CNA)
azl3 libXi 1.8.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
opensuse:libXi1.8.3-2.1 · openSUSE:TumbleweedPackage registry (OSV)
red hat:libXi0:1.8.3-2.1.hum1 · Red Hat:hummingbird:1Package registry (OSV)
red hat:libXi-devel0:1.8.3-2.1.hum1 · Red Hat:hummingbird:1Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-935430 days apartOut-of-bounds read in libXi's XI2 class parser
    29Monitor
  • CVE-2026-935410 days apartOut-of-bounds read in libXi's XQueryDeviceState()
    26Monitor
  • CVE-2026-935420 days apartOut-of-bounds read in libXi's XI2 class parsing via size_classes() and copy_classes()
    26Monitor
  • CVE-2026-935440 days apartOut-of-bounds read in libXi's XI2 XIQueryDevice reply parsing
    26Monitor
  • CVE-2026-942810 days apartOut-of-bounds read in libXi's XListInputDevices() class parsing
    26Monitor
  • CVE-2026-942824 days apartOut-of-bounds read in libXi's XI2 enter/leave/focus cookie conversion
    22Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • A user must open a link or visit a page.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
Required
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-125 · Out-of-bounds Read

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

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Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records