CVE-2023-43786

Publication date 3 October 2023

Last updated 11 July 2025

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

5.5 · Medium

Score breakdown

A vulnerability was found in libX11 due to an infinite loop within the PutSubImage() function. This flaw allows a local user to consume all available system resources and cause a denial of service condition.

Read the notes from the security team

Status

Package Ubuntu Release Status
motif 25.04 plucky
Needs evaluation
24.10 oracular Ignored end of life, was needs-triage
24.04 LTS noble
Needs evaluation
23.10 mantic Ignored end of life, was needs-triage
23.04 lunar Ignored end of life, was needs-triage
22.04 LTS jammy
Needs evaluation
20.04 LTS focal
Needs evaluation
18.04 LTS bionic
Needs evaluation
16.04 LTS xenial
Needs evaluation
14.04 LTS trusty
Needs evaluation
libx11 25.04 plucky
Fixed 2:1.8.6-1ubuntu1
24.10 oracular
Fixed 2:1.8.6-1ubuntu1
24.04 LTS noble
Fixed 2:1.8.6-1ubuntu1
23.10 mantic
Fixed 2:1.8.6-1ubuntu1
23.04 lunar
Fixed 2:1.8.4-2ubuntu0.3
22.04 LTS jammy
Fixed 2:1.7.5-1ubuntu0.3
20.04 LTS focal
Fixed 2:1.6.9-2ubuntu1.6
18.04 LTS bionic
Fixed 2:1.6.4-3ubuntu0.4+esm2
16.04 LTS xenial
Fixed 2:1.6.3-1ubuntu2.2+esm4
14.04 LTS trusty
Fixed 2:1.6.2-1ubuntu2.1+esm5
libxpm 25.04 plucky
Fixed 1:3.5.12-1.1ubuntu1
24.10 oracular
Fixed 1:3.5.12-1.1ubuntu1
24.04 LTS noble
Fixed 1:3.5.12-1.1ubuntu1
23.10 mantic
Fixed 1:3.5.12-1.1ubuntu1
23.04 lunar
Fixed 1:3.5.12-1.1ubuntu0.1
22.04 LTS jammy
Fixed 1:3.5.12-1ubuntu0.22.04.2
20.04 LTS focal
Fixed 1:3.5.12-1ubuntu0.20.04.2
18.04 LTS bionic
Fixed 1:3.5.12-1ubuntu0.18.04.2+esm1
16.04 LTS xenial
Fixed 1:3.5.11-1ubuntu0.16.04.1+esm2
14.04 LTS trusty
Fixed 1:3.5.10-1ubuntu0.1+esm2

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Notes

mdeslaur

issue is in libx11, but libxpm was also fixed to avoid passing invalid data

Severity score breakdown

Parameter Value
Base score 5.5 · Medium
Attack vector Local
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality None
Integrity impact None
Availability impact High
Vector CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

Other references