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Fencer Vulns
critical 9.1

CVE-2022-23493 json

Out of Bound Read in xrdp

published 2022-12-09 3 y ago modified 2026-06-17 4 mo ago also EUVD-2022-28549

cvss
9.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 62%
public exploits
0
none known

Summary

xrdp is an open source project which provides a graphical login to remote machines using Microsoft Remote Desktop Protocol (RDP). xrdp < v0.9.21 contain a Out of Bound Read in xrdp_mm_trans_process_drdynvc_channel_close() function. There are no known workarounds for this issue. Users are advised to upgrade.

Patch / fix

  • neutrinolabs xrdp 0.9.21
  • xrdp Debian 14, Debian 13, Debian 12 0.9.21.1-1

debian advisories DEBIAN-CVE-2022-23493

  • xrdp Ubuntu Pro 20.04 LTS 0.9.12-1ubuntu0.1+esm1
  • xrdp Ubuntu Pro 22.04 LTS 0.9.17-2ubuntu2+esm1

ubuntu advisories UBUNTU-CVE-2022-23493

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • xrdp SLES for SAP 12 SP5, SLES 12 SP5 0.9.10-3.8.1
  • xrdp SLES for SAP 15 SP3, SLES for SAP 15 SP2, SLES 15 SP3-LTSS +15 more 0.9.13.1-150200.4.15.1

suse advisories SUSE-SU-2023:0374-1SUSE-SU-2023:0033-1

  • xrdp openSUSE Tumbleweed 0.9.20-4.1

opensuse advisories openSUSE-SU-2024:12602-1

  • xrdp Alpine 3.24, Alpine 3.23, Alpine 3.22 +5 more 0.9.21.1-r0

alpine advisories ALPINE-CVE-2022-23493

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-23493 updated cvss 9.1

xrdp: out-of-bound read in xrdp_mm_trans_process_drdynvc_channel_close()

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
18 mo ago

Exploit prediction

0.98% chance of exploitation in the next 30 days, higher than 62% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
NVD 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected products

  • neutrinolabs xrdp

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.