CVE-2026-59691
High
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.
SeverityHigh
CVSS7.1
Exploit probability26. percentile0.3%
Product
Red Hat Enterprise Linux 10
PublishedJul 9, 2026
First seenJul 9, 2026
Weakness typeCWE-787Out-of-bounds write
How to fix
Vendor advisories
- access.redhat.com/errata/RHSA-2026:47179
- access.redhat.com/errata/RHSA-2026:47180
- access.redhat.com/errata/RHSA-2026:47731
- access.redhat.com/errata/RHSA-2026:54658
- access.redhat.com/errata/RHSA-2026:54659
- access.redhat.com/errata/RHSA-2026:54660
- access.redhat.com/errata/RHSA-2026:54664
- access.redhat.com/errata/RHSA-2026:54665
- access.redhat.com/errata/RHSA-2026:54752
- access.redhat.com/errata/RHSA-2026:56658
- access.redhat.com/errata/RHSA-2026:56772
- access.redhat.com/errata/RHSA-2026:62532
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Red Hat Enterprise Linux 10 | No range specified | — |
| Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support | No range specified | — |
| Red Hat Red Hat Enterprise Linux 7 Extended Lifecycle Support | No range specified | — |
| enterprise_linux 8 | No range specified | — |
| rhel_aus 8.4 | No range specified | — |
| rhel_aus 8.6 | No range specified | — |
| rhel_e4s 8.8 | No range specified | — |
| enterprise_linux 9 | No range specified | — |
| rhel_e4s 9.2 | No range specified | — |
| rhel_e4s 9.4 | No range specified | — |
| rhel_eus 9.6 | No range specified | — |
| Red Hat Red Hat Enterprise Linux 6 | No range specified | — |
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