Description
A heap buffer overflow vulnerability was found in GStreamer's rfbsrc plugin. When a client connects to a malicious RFB/VNC server that advertises a 16bpp framebuffer and sends Hextile-encoded updates, the Hextile background fill path writes 32-bit pixel values into a buffer allocated for 16-bit pixels. This type mismatch causes an out-of-bounds heap write that can lead to denial of service (process crash) and potential memory corruption.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 7 Extended Lifecycle Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | — | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | — | — |
| Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | — | — |
| Red Hat | Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions | — | — |
| Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
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 | gst-plugins-bad1.0 | 1.28.5-1 | — |
| Debian 13 | gst-plugins-bad1.0 | No fix yet | — |
| Debian 12 | gst-plugins-bad1.0 | 1.22.0-4+deb12u8 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | gst-plugins-bad1.0 | No fix yet | — |
| Ubuntu 26.04 LTS | gst-plugins-bad1.0 | No fix yet | — |
| Ubuntu 25.10 | gst-plugins-bad1.0 | No fix yet | — |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 24.04 LTS | gst-plugins-bad1.0 | No fix yet | — |
| Ubuntu Pro 22.04 LTS | gst-plugins-bad1.0 | No fix yet | — |
| Ubuntu Pro 20.04 LTS | gst-plugins-bad1.0 | No fix yet | — |
| Ubuntu Pro 18.04 LTS | gst-plugins-bad1.0 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | gst-plugins-bad1.0 | No fix yet | — |
| Ubuntu Pro 14.04 LTS | gst-plugins-bad1.0 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | gstreamer1-plugins-bad-free +2 | 1.26.7-2.el10_2.6 | RHSA-2026:47180 |
| RHEL 9 | gstreamer1-plugins-bad-free +2 | 1.22.12-7.el9_8.3 | RHSA-2026:47179 |
| RHEL 8 | gstreamer1-plugins-bad-free +1 | 1.16.1-9.el8_10.1 | RHSA-2026:47731 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | gstreamer1-plugins-bad-free +2 | 1.24.11-3.el10_0.6 | RHSA-2026:54659 |
| RHEL 9.6 EUS | gstreamer1-plugins-bad-free +2 | 1.22.12-5.el9_6.6 | RHSA-2026:54660 |
| RHEL 9.4 E4S | gstreamer1-plugins-bad-free | 1.22.1-6.el9_4.6 | RHSA-2026:54658 |
| RHEL 9.2 E4S | gstreamer1-plugins-bad-free | 1.18.4-9.el9_2.5 | RHSA-2026:56658 |
| RHEL 8.8 TUS | gstreamer1-plugins-bad-free | 1.16.1-4.el8_8.4 | RHSA-2026:54664 |
| RHEL 8.8 E4S | gstreamer1-plugins-bad-free | 1.16.1-4.el8_8.4 | RHSA-2026:54664 |
| RHEL 8.6 EUS Long Life | gstreamer1-plugins-bad-free | 1.16.1-4.el8_6.4 | RHSA-2026:54665 |
| RHEL 8.6 AUS | gstreamer1-plugins-bad-free | 1.16.1-4.el8_6.4 | RHSA-2026:54665 |
| RHEL 8.4 EUS Long Life | gstreamer1-plugins-bad-free | 1.16.1-4.el8_4.4 | RHSA-2026:56772 |
| RHEL 8.4 AUS | gstreamer1-plugins-bad-free | 1.16.1-4.el8_4.4 | RHSA-2026:56772 |
| RHEL 7 ELS | gstreamer-plugins-bad-free +2 | 0.10.23-26.el7_9 | RHSA-2026:62532 |
| RHEL 7 ELS | gstreamer1-plugins-bad-free +2 | 1.10.4-7.el7_9 | RHSA-2026:54752 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | gstreamer1-plugins-bad-free +2 | 1.26.7-2.el10_2.6 | ALSA-2026:47180 |
| AlmaLinux 9 | gstreamer1-plugins-bad-free +2 | 1.22.12-7.el9_8.3 | ALSA-2026:47179 |
| AlmaLinux 8 | gstreamer1-plugins-bad-free +1 | 1.16.1-9.el8_10.1 | ALSA-2026:47731 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | gstreamer1-plugins-bad-free | 1.26.7-2.el10_2.6 | RLSA-2026:47180 |
| Rocky Linux 9 | gstreamer1-plugins-bad-free | 1.22.12-7.el9_8.3 | RLSA-2026:47179 |
| Rocky Linux 8 | gstreamer1-plugins-bad-free | 1.16.1-9.el8_10.1 | RLSA-2026:47731 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | gstreamer1-plugin-openh264 +3 | 1.24.10-1.amzn2023.0.8 | ALAS2023-2026-1994 |
| Amazon Linux 2 | gstreamer-plugins-bad-free +2 | 0.10.23-42.amzn2.0.5 | ALAS2-2026-3830 |
| Amazon Linux 2 | gstreamer1-plugins-bad-free +1 | 1.18.4-5.amzn2.0.7 | ALAS2-2026-3833 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | gstreamer1-plugins-bad-free +2 | 1.26.7-2.el10_2.6 | ELSA-2026-47180 |
| Oracle Linux 9 | gstreamer1-plugins-bad-free +2 | 1.22.12-7.el9_8.3 | ELSA-2026-47179 |
| Oracle Linux 8 | gstreamer1-plugins-bad-free +1 | 1.16.1-9.0.1.el8_10.1 | ELSA-2026-47731 |
| Oracle Linux 7 | gstreamer1-plugins-bad-free +2 | 1.10.4-4.0.5.el7_9 | ELSA-2026-54752 |
Advisories 26
- WID-SEC-2026-2259 GStreamer: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 9, 2026
- ALSA-2026:47179 Important: gstreamer1-plugins-bad-free security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:47180 Important: gstreamer1-plugins-bad-free security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:47731 Important: gstreamer1-plugins-bad-free security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:62532 Red Hat Security Advisory: gstreamer-plugins-bad-free security update Red Hat Security Advisories (RHSA) · Sep 11, 2026
- RHSA-2026:56772 Red Hat Security Advisory: gstreamer1-plugins-bad-free security update Red Hat Security Advisories (RHSA) · Sep 11, 2026
- RHSA-2026:56658 Red Hat Security Advisory: gstreamer1-plugins-bad-free security update Red Hat Security Advisories (RHSA) · Sep 11, 2026
- RHSA-2026:54665 Red Hat Security Advisory: gstreamer1-plugins-bad-free security update Red Hat Security Advisories (RHSA) · Sep 11, 2026
- RHSA-2026:54752 Red Hat Security Advisory: gstreamer1-plugins-bad-free security update Red Hat Security Advisories (RHSA) · Sep 11, 2026
- RHSA-2026:54664 Red Hat Security Advisory: gstreamer1-plugins-bad-free security update Red Hat Security Advisories (RHSA) · Sep 11, 2026
- RHSA-2026:54659 Red Hat Security Advisory: gstreamer1-plugins-bad-free security update Red Hat Security Advisories (RHSA) · Sep 11, 2026
- RHSA-2026:54660 Red Hat Security Advisory: gstreamer1-plugins-bad-free security update Red Hat Security Advisories (RHSA) · Sep 11, 2026
- RHSA-2026:54658 Red Hat Security Advisory: gstreamer1-plugins-bad-free security update Red Hat Security Advisories (RHSA) · Sep 11, 2026
- RHSA-2026:47731 Red Hat Security Advisory: gstreamer1-plugins-bad-free security update Red Hat Security Advisories (RHSA) · Sep 11, 2026
- RHSA-2026:47179 Red Hat Security Advisory: gstreamer1-plugins-bad-free security update Red Hat Security Advisories (RHSA) · Sep 11, 2026
- RHSA-2026:47180 Red Hat Security Advisory: gstreamer1-plugins-bad-free security update Red Hat Security Advisories (RHSA) · Sep 11, 2026
- ELSA-2026-54752 Important: gstreamer1-plugins-bad-free security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Sep 9, 2026
- ALAS2-2026-3830 Important: gstreamer-plugins-bad-free security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Aug 4, 2026
- ALAS2-2026-3833 Important: gstreamer1-plugins-bad-free security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Aug 4, 2026
- ALAS2023-2026-1994 Important: gstreamer1-plugins-bad-free security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Aug 4, 2026
- RLSA-2026:47179 Important: gstreamer1-plugins-bad-free security update Rocky Linux Security Advisories · Aug 3, 2026
- RLSA-2026:47731 Important: gstreamer1-plugins-bad-free security update Rocky Linux Security Advisories · Jul 30, 2026
- RLSA-2026:47180 Important: gstreamer1-plugins-bad-free security update Rocky Linux Security Advisories · Jul 29, 2026
- ELSA-2026-47179 Important: gstreamer1-plugins-bad-free security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jul 29, 2026
- ELSA-2026-47731 Important: gstreamer1-plugins-bad-free security update (Oracle Linux 8) Oracle Linux Security Advisories (ELSA) · Jul 29, 2026
- ELSA-2026-47180 Important: gstreamer1-plugins-bad-free security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 28, 2026
References
- RHSA-2026:47179 vendor-advisory
- RHSA-2026:47180 vendor-advisory
- RHSA-2026:47731 vendor-advisory
- RHSA-2026:54658 vendor-advisory
- RHSA-2026:54659 vendor-advisory
- RHSA-2026:54660 vendor-advisory
- RHSA-2026:54664 vendor-advisory
- RHSA-2026:54665 vendor-advisory
- RHSA-2026:54752 vendor-advisory
- RHSA-2026:56658 vendor-advisory
- RHSA-2026:56772 vendor-advisory
- RHSA-2026:62532 vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-59691 vdb-entry
- RHBZ#2497343 issue-tracking
- https://gitlab.freedesktop.org/gstreamer/gstreamer-security/-/merge_requests/100
- https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5173