CVE-2026-91950

Summary

FreeRDP before 3.31.0 contains an out-of-bounds read vulnerability in the rdpdr_dump_packet function due to 32-bit unsigned integer wraparound in buffer bounds validation. A malicious RDP server can send a crafted RDPDR packet with computerNameLen set to 0xFFFFFFF0 to bypass bounds checks and trigger memory reads past the packet buffer, causing client crashes or heap disclosure in logs.

Affected Software

Weaknesses

• CWE-125: Out-of-bounds Read

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: poc
  • Automatable: no
  • Technical Impact: partial

Additional References

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-c5gr-hmqp-pwj4

References

• https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-c5gr-hmqp-pwj4
• https://www.vulncheck.com/advisories/freerdp-before-3.31.0-out-of-bounds-read-via-uint32-wraparound

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