{"schema_version":"1.7.2","id":"OESA-2026-4656","modified":"2026-10-29T09:04:07Z","published":"2026-10-29T09:04:07Z","upstream":["CVE-2026-91953","CVE-2026-91956","CVE-2026-91959","CVE-2026-91963","CVE-2026-91964"],"summary":"freerdp security update","details":"FreeRDP is a client implementation of the Remote Desktop Protocol (RDP) that follows Microsoft's open specifications. This package provides the client applications xfreerdp.\r\n\r\nSecurity Fix(es):\n\nFreeRDP versions before 3.31.0 contain a heap buffer overflow vulnerability in nego_send_negotiation_request() that fails to validate the LB_LOAD_BALANCE_INFO field length before writing to a fixed 512-byte buffer. A malicious RDP server or man-in-the-middle can send a Server Redirection PDU with an oversized LB_LOAD_BALANCE_INFO value to overflow the buffer with attacker-controlled content, causing denial of service or heap corruption before authentication completes.(CVE-2026-91953)\n\nFreeRDP before 3.31.0 contains an out-of-bounds read vulnerability in the URBDRC channel's func_get_ep_desc function that indexes interface arrays by position instead of protocol field InterfaceNumber. A malicious RDP server can send a crafted SELECT_CONFIGURATION message with permuted InterfaceNumber values to read past allocated heap memory and crash the client.(CVE-2026-91956)\n\nFreeRDP is an implementation of the Remote Desktop Protocol (RDP) open sourced by the FreeRDP team.\n FreeRDP versions before 3.31.0 have a buffer error vulnerability. This vulnerability originates from buffer over-reading in the rts_read_result function in the RPC gateway transport parser. An attacker can trigger an out-of-bounds read by sending a specially crafted BIND_ACK PDU with truncated result entries, causing the process to terminate.(CVE-2026-91959)\n\nFreeRDP versions before 3.31.0 contain an uninitialized heap memory disclosure vulnerability in the urbdrc USB redirection channel. A malicious RDP server can induce failing USB transfers to read uninitialized heap memory from the client, defeating ASLR and enabling remote code execution when chained with memory corruption vulnerabilities.(CVE-2026-91963)\n\nFreeRDP versions before 3.31.0 contain a heap-based buffer overflow in nego_send_negotiation_request when processing Server Redirection PDU messages with attacker-controlled LoadBalanceInfo fields. A malicious RDP server can trigger the overflow by sending an arbitrary-length field that gets written to a fixed 512-byte buffer without validation, causing client crashes or potential code execution when chained with memory disclosure.(CVE-2026-91964)","affected":[{"package":{"ecosystem":"openEuler:24.03-LTS-SP4","name":"freerdp","purl":"pkg:rpm/openEuler/freerdp&distro=openEuler-24.03-LTS-SP4"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.11.8-11.oe2403sp4"}]}],"ecosystem_specific":{"aarch64":["freerdp-2.11.8-11.oe2403sp4.aarch64.rpm","freerdp-debuginfo-2.11.8-11.oe2403sp4.aarch64.rpm","freerdp-debugsource-2.11.8-11.oe2403sp4.aarch64.rpm","freerdp-devel-2.11.8-11.oe2403sp4.aarch64.rpm","freerdp-help-2.11.8-11.oe2403sp4.aarch64.rpm","libwinpr-2.11.8-11.oe2403sp4.aarch64.rpm","libwinpr-devel-2.11.8-11.oe2403sp4.aarch64.rpm"],"src":["freerdp-2.11.8-11.oe2403sp4.src.rpm"],"x86_64":["freerdp-2.11.8-11.oe2403sp4.x86_64.rpm","freerdp-debuginfo-2.11.8-11.oe2403sp4.x86_64.rpm","freerdp-debugsource-2.11.8-11.oe2403sp4.x86_64.rpm","freerdp-devel-2.11.8-11.oe2403sp4.x86_64.rpm","freerdp-help-2.11.8-11.oe2403sp4.x86_64.rpm","libwinpr-2.11.8-11.oe2403sp4.x86_64.rpm","libwinpr-devel-2.11.8-11.oe2403sp4.x86_64.rpm"]}}],"references":[{"type":"ADVISORY","url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-4656"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91953"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91956"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91959"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91963"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91964"}],"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}],"database_specific":{"severity":"High"}}