CVE-2026-22858
FreeRDP has a global-buffer-overflow in crypto_base64_decode
02 Description
FreeRDP has a global-buffer-overflow in crypto_base64_decode
03 Exploitation and scoring
- Exploitation
- Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.
- SSVC decision
- ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.
- EPSS probability
- 0.70% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 53.0% of scored records. A rank, not a probability.
- NVD base score
- 5.6 (CVSS v4.0), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- NVD analysis status
- Modified. NVD last modified this record on 2026-07-15.
- Red Hat severity
- Important. 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
- 2026-01-14 17:56Z9 MO AGO
- Last updated
- 2026-08-19 12:05Z2 MO AGO
- Reserved
- 2026-01-12
- Assigning CNA
- GitHub_M
- Record state
- PUBLISHED
- Severity
- Medium (CVSS 5.6)
- CNA CVSS vector
- CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:P/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N/E:P
- Weaknesses
- Data version
- 5.2
- Document digest
- 81e545f5bcfedfaf3b8e8d7a1298ca1c7c409f4b4b50bdac171685fc65171a99
05 Affected products
06 References
- github.comhttps://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-qmqf-m84q-x896
- github.comhttps://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1
- access.redhat.comhttps://access.redhat.com/security/cve/CVE-2026-22858
- bugzilla.redhat.comRHBZ#2429649https://bugzilla.redhat.com/show_bug.cgi?id=2429649
- security.access.redhat.comhttps://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-22858.json
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:4471
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:4121
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:3068
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:19033
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:3334
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:4433
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:4439
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:4446
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:4440
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:4489
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:4437
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:4438
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:3975
- access.redhat.comhttps://access.redhat.com/errata/RHSA-2026:3067
07 Fixed in
AlmaLinux 8
- freerdp Fixed in 2:2.11.7-3.el8_10
- freerdp-devel Fixed in 2:2.11.7-3.el8_10
- freerdp-libs Fixed in 2:2.11.7-3.el8_10
- libwinpr Fixed in 2:2.11.7-3.el8_10
- libwinpr-devel Fixed in 2:2.11.7-3.el8_10
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- freerdp Fixed in 2:2.11.7-1.el9_7.2
- freerdp-devel Fixed in 2:2.11.7-1.el9_7.2
- freerdp-libs Fixed in 2:2.11.7-1.el9_7.2
- libwinpr Fixed in 2:2.11.7-1.el9_7.2
- libwinpr-devel Fixed in 2:2.11.7-1.el9_7.2
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 10
- freerdp Fixed in 2:3.10.3-5.el10_1.2
- freerdp-devel Fixed in 2:3.10.3-5.el10_1.2
- freerdp-libs Fixed in 2:3.10.3-5.el10_1.2
- freerdp-server Fixed in 2:3.10.3-5.el10_1.2
- libwinpr Fixed in 2:3.10.3-5.el10_1.2
- libwinpr-devel Fixed in 2:3.10.3-5.el10_1.2
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- freerdp Fixed in 2:2.11.7-3.el8_10
- freerdp-devel Fixed in 2:2.11.7-3.el8_10
- freerdp-libs Fixed in 2:2.11.7-3.el8_10
- libwinpr Fixed in 2:2.11.7-3.el8_10
- libwinpr-devel Fixed in 2:2.11.7-3.el8_10
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
- freerdp Fixed in 2:2.11.7-1.el9_7.2
- freerdp-devel Fixed in 2:2.11.7-1.el9_7.2
- freerdp-libs Fixed in 2:2.11.7-1.el9_7.2
- libwinpr Fixed in 2:2.11.7-1.el9_7.2
- libwinpr-devel Fixed in 2:2.11.7-1.el9_7.2
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.
CloudLinux 10
- freerdp Fixed in 2:3.10.3-5.el10_1.2
- freerdp-devel Fixed in 2:3.10.3-5.el10_1.2
- freerdp-libs Fixed in 2:3.10.3-5.el10_1.2
- freerdp-server Fixed in 2:3.10.3-5.el10_1.2
- libwinpr Fixed in 2:3.10.3-5.el10_1.2
- libwinpr-devel Fixed in 2:3.10.3-5.el10_1.2
Derived from AlmaLinux 10. Partial coverage: only packages taken from AlmaLinux 10 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
- freerdp2 No fix yet
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- freerdp3 Fixed in 3.15.0+dfsg-2.1+deb13u1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- freerdp3 Fixed in 3.20.2+dfsg-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- freerdp No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- freerdp No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- freerdp2 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 24.04 LTS
- freerdp3 Fixed in 3.5.1+dfsg1-0ubuntu1.4
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 25.10
- freerdp3 Fixed in 3.16.0+dfsg-2ubuntu0.3
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 26.04 LTS
- freerdp3 Fixed in 3.20.2+dfsg-1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 18.04 LTS
- freerdp2 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 20.04 LTS
- freerdp2 No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu Pro 24.04 LTS
- freerdp2 No fix yet
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.