CVE-2026-52720

Summary

A heap buffer overflow vulnerability was found in GStreamer's librfb (RFB/VNC client). The rectangle bounds check incorrectly validates area rather than individual dimensions, allowing a malicious VNC server to send a rectangle that extends beyond the framebuffer. A remote attacker could set up a malicious VNC server and trick a user into connecting, resulting in an out-of-bounds heap write that could lead to code execution or a crash.

Affected Software

VendorProductVersion RangeStatus
Red HatRed Hat Enterprise Linux 100:1.26.7-2.el10_2.4 < *unaffected
Red HatRed Hat Enterprise Linux 10.0 Extended Update Support0:1.24.11-3.el10_0.4 < *unaffected
Red HatRed Hat Enterprise Linux 7 Extended Lifecycle Support0:1.10.4-6.el7_9 < *unaffected
Red HatRed Hat Enterprise Linux 7 Extended Lifecycle Support0:0.10.23-25.el7_9 < *unaffected
Red HatRed Hat Enterprise Linux 80:1.16.1-8.el8_10 < *unaffected
Red HatRed Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support0:1.16.1-4.el8_4.2 < *unaffected
Red HatRed Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On0:1.16.1-4.el8_4.2 < *unaffected
Red HatRed Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support0:1.16.1-4.el8_6.2 < *unaffected
Red HatRed Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On0:1.16.1-4.el8_6.2 < *unaffected
Red HatRed Hat Enterprise Linux 8.8 Telecommunications Update Service0:1.16.1-4.el8_8.2 < *unaffected
Red HatRed Hat Enterprise Linux 8.8 Update Services for SAP Solutions0:1.16.1-4.el8_8.2 < *unaffected
Red HatRed Hat Enterprise Linux 90:1.22.12-7.el9_8.1 < *unaffected
Red HatRed Hat Enterprise Linux 9.2 Update Services for SAP Solutions0:1.18.4-9.el9_2.3 < *unaffected
Red HatRed Hat Enterprise Linux 9.4 Update Services for SAP Solutions0:1.22.1-6.el9_4.4 < *unaffected
Red HatRed Hat Enterprise Linux 9.6 Extended Update Support0:1.22.12-5.el9_6.4 < *unaffected

Weaknesses

  • CWE-122: Heap-based Buffer Overflow

Workarounds

Red Hat is not aware of a practical temporary workaround that fully mitigates this issue or meets Red Hat Product Security's standards for usability, deployment, applicability, or stability. Customers are advised to apply the relevant security updates if they become available.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: total

gstreamer1-plugins-bad-free: GStreamer: Heap buffer overflow via crafted VNC server rectangle in librfb

Additional References

References