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01 Record

CVE-2023-43785

Libx11: out-of-bounds memory access in _xkbreadkeysyms()

MediumPUBLISHEDCNA: redhat
CNA base score6.5 CVSS v3.xCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
View raw JSON

02 Description

Libx11: out-of-bounds memory access in _xkbreadkeysyms()

03 Exploitation and scoring

Exploitation
Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
SSVC decision
  • ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
  • AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
  • Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.
EPSS probability
0.66% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 51.3% of scored records. A rank, not a probability.
NVD base score
5.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2023-10-10 12:26Z3 YR AGO
Last updated
2025-11-06 22:59Z11 MO AGO
Reserved
2023-09-22
Assigning CNA
redhat
Record state
PUBLISHED
Severity
Medium (CVSS 6.5)
CNA CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Weaknesses
Data version
5.2
Document digest
64271335bba0ca8398100444eb7dd4e9504966639cf4acff10caeb86804e2d62

05 Affected products

VendorProductVersionsPlatforms
Red HatRed Hat Enterprise Linux 8Not specified—
Red HatRed Hat Enterprise Linux 9Not specified—
Red HatRed Hat Enterprise Linux 6Not specified—
Red HatRed Hat Enterprise Linux 7Not specified—

06 References

07 Fixed in

AlmaLinux 8

  • libX11
    Fixed in 1.6.8-8.el8
  • libX11-common
    Fixed in 1.6.8-8.el8
  • libX11-devel
    Fixed in 1.6.8-8.el8
  • libX11-xcb
    Fixed in 1.6.8-8.el8

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

AlmaLinux 9

  • libX11
    Fixed in 1.7.0-9.el9
  • libX11-common
    Fixed in 1.7.0-9.el9
  • libX11-devel
    Fixed in 1.7.0-9.el9
  • libX11-xcb
    Fixed in 1.7.0-9.el9

Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 8

  • libX11
    Fixed in 1.6.8-8.el8
  • libX11-common
    Fixed in 1.6.8-8.el8
  • libX11-devel
    Fixed in 1.6.8-8.el8
  • libX11-xcb
    Fixed in 1.6.8-8.el8

Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

CloudLinux 9

  • libX11
    Fixed in 1.7.0-9.el9
  • libX11-common
    Fixed in 1.7.0-9.el9
  • libX11-devel
    Fixed in 1.7.0-9.el9
  • libX11-xcb
    Fixed in 1.7.0-9.el9

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.

Debian 12

  • libx11
    Fixed in 2:1.8.4-2+deb12u2

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

  • libx11
    Fixed in 2:1.8.7-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

  • libx11
    Fixed in 2:1.8.7-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 20.04 LTS

  • libx11
    Fixed in 2:1.6.9-2ubuntu1.6

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu 22.04 LTS

  • libx11
    Fixed in 2:1.7.5-1ubuntu0.3

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 14.04 LTS

  • libx11
    Fixed in 2:1.6.2-1ubuntu2.1+esm5
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 16.04 LTS

  • libx11
    Fixed in 2:1.6.3-1ubuntu2.2+esm4
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

Ubuntu Pro 18.04 LTS

  • libx11
    Fixed in 2:1.6.4-3ubuntu0.4+esm2
    Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro

Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.

A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.