Description
FreeRDP before 3.29.0 (affected versions <= 3.28.0) contains a heap out-of-bounds read in update_process_glyph_fragments()/glyph_cache_fragment_put() in libfreerdp/cache/glyph.c. When handling a GLYPH_FRAGMENT_ADD update, the code reads a one-byte server-controlled declared fragment size but does not verify it fits within the remaining received buffer before allocating and copying that many bytes. A malicious RDP server can send a short fragment with an oversized declared size, causing the client to read beyond the allocated buffer, resulting in an out-of-bounds read and client crash.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| FreeRDP | FreeRDP | < 3.29.0 | 3.29.0 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | freerdp3 | 3.29.0+dfsg-1 | — |
| Debian 13 | freerdp3 | No fix yet | — |
| Debian 12 | freerdp2 | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.04 LTS | freerdp3 | 3.30.0+dfsg-0ubuntu0.26.04.1 | — |
| Ubuntu 24.04 LTS | freerdp3 | 3.30.0+dfsg-0ubuntu0.24.04.1 | — |
| Ubuntu 22.04 LTS | freerdp2 | No fix yet | — |
| Ubuntu 18.04 LTS | freerdp | No fix yet | — |
| Ubuntu 16.04 LTS | freerdp | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | freerdp2 | No fix yet | — |
| Ubuntu Pro 20.04 LTS | freerdp2 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | freerdp2 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | freerdp +5 | 2:3.10.3-12.el10_2.10 | RHSA-2026:61378 |
| RHEL 9 | freerdp +4 | 2:2.11.7-7.el9_8.6 | RHSA-2026:61379 |
| RHEL 8 | freerdp +4 | 2:2.11.7-12.el8_10 | RHSA-2026:62571 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | freerdp +5 | 2:3.10.3-3.el10_0.16 | RHSA-2026:68706 |
| RHEL 9.6 EUS | freerdp +4 | 2:2.11.7-1.el9_6.13 | RHSA-2026:71387 |
| RHEL 9.4 E4S | freerdp +2 | 2:2.11.2-1.el9_4.11 | RHSA-2026:71390 |
| RHEL 9.2 E4S | freerdp +2 | 2:2.4.1-6.el9_2.12 | RHSA-2026:71388 |
| RHEL 8.8 TUS | freerdp +3 | 2:2.2.0-12.el8_8.11 | RHSA-2026:66282 |
| RHEL 8.8 E4S | freerdp +3 | 2:2.2.0-12.el8_8.11 | RHSA-2026:66282 |
| RHEL 8.6 EUS Long Life | freerdp +3 | 2:2.2.0-7.el8_6.12 | RHSA-2026:66281 |
| RHEL 8.6 AUS | freerdp +3 | 2:2.2.0-7.el8_6.12 | RHSA-2026:66281 |
| RHEL 8.4 EUS Long Life | freerdp +3 | 2:2.2.0-14.el8_4.3 | RHSA-2026:65855 |
| RHEL 8.4 AUS | freerdp +3 | 2:2.2.0-14.el8_4.3 | RHSA-2026:65855 |
| RHEL 7 ELS | freerdp +4 | 2.1.1-5.el7_9.12 | RHSA-2026:68707 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | freerdp +5 | 2:3.10.3-12.el10_2.10 | ALSA-2026:61378 |
| AlmaLinux 9 | freerdp +4 | 2:2.11.7-7.el9_8.6 | ALSA-2026:61379 |
| AlmaLinux 8 | freerdp +4 | 2:2.11.7-12.el8_10 | ALSA-2026:62571 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | freerdp | 2:3.10.3-12.el10_2.10 | RLSA-2026:61378 |
| Rocky Linux 9 | freerdp | 2:2.11.7-7.el9_8.6 | RLSA-2026:61379 |
| Rocky Linux 8 | freerdp | 2:2.11.7-12.el8_10 | RLSA-2026:62571 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | freerdp +5 | 2:3.6.3-1.amzn2023.0.15 | ALAS2023-2026-2111 |
| Amazon Linux 2 | freerdp +4 | 2:2.11.7-1.amzn2.0.14 | ALAS2-2026-3887 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | freerdp +4 | 2.1.1-5.0.13.el7_9 | ELSA-2026-68707 |
Advisories 21
- RHSA-2026:61378 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- RHSA-2026:71387 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Nov 13, 2026
- ALSA-2026:61379 Important: freerdp security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:61378 Important: freerdp security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:62571 Important: freerdp security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:71390 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Sep 30, 2026
- RHSA-2026:71388 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Sep 30, 2026
- RHSA-2026:68706 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Sep 30, 2026
- RHSA-2026:68707 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Sep 30, 2026
- RHSA-2026:66282 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Sep 30, 2026
- RHSA-2026:66281 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Sep 30, 2026
- RHSA-2026:65855 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Sep 30, 2026
- RHSA-2026:62571 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Sep 30, 2026
- RHSA-2026:61379 Red Hat Security Advisory: freerdp security update Red Hat Security Advisories (RHSA) · Sep 30, 2026
- WID-SEC-2026-2384 FreeRDP: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 28, 2026
- ELSA-2026-68707 Important: freerdp security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 28, 2026
- ALAS2-2026-3887 Important: freerdp security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Sep 9, 2026
- RLSA-2026:62571 Important: freerdp security update Rocky Linux Security Advisories · Sep 3, 2026
- RLSA-2026:61378 Important: freerdp security update Rocky Linux Security Advisories · Sep 1, 2026
- RLSA-2026:61379 Important: freerdp security update Rocky Linux Security Advisories · Sep 1, 2026
- ALAS2023-2026-2111 Important: freerdp security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Aug 31, 2026
References
- GitHub Security Advisory (GHSA-hgj8-g595-wfc6) vendor-advisory
- Patch Commit patch
- VulnCheck Advisory: FreeRDP before 3.29.0 Heap Out-of-Bounds Read via GLYPH_FRAGMENT_ADD third-party-advisory