{ "document":{ "aggregate_severity":{ "namespace":"https://nvd.nist.gov/vuln-metrics/cvss", "text":"HIGH" }, "category":"csaf_vex", "csaf_version":"2.0", "distribution":{ "tlp":{ "label":"WHITE", "url":"https:/www.first.org/tlp/" } }, "lang":"en", "notes":[ { "text":"FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, in the RLE planar decode path, `planar_decompress_plane_rle()` writes into `pDstData` at `((nYDst+y) * nDstStep) + (4*nXDst) + nChannel` without verifying that `(nYDst+nSrcHeight)` fits in the destination height or that `(nXDst+nSrcWidth)` fits in the destination stride. When `TempFormat != DstFormat`, `pDstData` becomes `planar->pTempData` (sized for the desktop), while `nYDst` is only validated against the **surface** by `is_within_surface()`. A malicious RDP server can exploit this to perform a heap out-of-bounds write with attacker-controlled offset and pixel data on any connecting FreeRDP client. The OOB write reaches up to 132,096 bytes past the temp buffer end, and on the brk heap (desktop ≤ 128×128), an adjacent `NSC_CONTEXT` struct's `decode` function pointer is overwritten with attacker-controlled pixel data — control-flow–relevant corruption (function pointer overwritten) demonstrated under deterministic heap layout (`nsc->decode = 0xFF414141FF414141`). Version 3.23.0 fixes the vulnerability.", "category":"general", "title":"Synopsis" } ], "publisher":null, "references":[ { "summary":"nvd cve", "category":"external", "url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26965" }, { "summary":"CVE-2026-26965 vex file", "category":"self", "url":"https://repo.openeuler.org/security/data/csaf/cve/2026/csaf-openeuler-cve-2026-26965.json" }, { "summary":"openEuler-SA-2026-2040", "category":"self", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2040" }, { "summary":"CVE-2026-26965", "category":"self", "url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-26965&packageName=freerdp" } ], "title":"openEuler cve CVE-2026-26965", "tracking":{ "initial_release_date":"2026-04-28T10:54:47+08:00", "revision_history":[ { "date":"2026-04-28T10:54:47+08:00", "summary":"Initial", "number":"1.0.0" } ], "generator":{ "date":"2026-04-28T10:54:47+08:00", "engine":{ "name":"openEuler CSAF Tool V1.0" } 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openEuler-24.03-LTS-SP1" }, "category":"default_component_of" }, { "relates_to_product_reference":"openEuler-24.03-LTS-SP1", "product_reference":"libwinpr-2.11.8-3.oe2403sp1.aarch64.rpm", "full_product_name":{ "product_id":"openEuler-24.03-LTS-SP1:libwinpr-2.11.8-3.oe2403sp1.aarch64", "name":"libwinpr-2.11.8-3.oe2403sp1.aarch64 as a component of openEuler-24.03-LTS-SP1" }, "category":"default_component_of" }, { "relates_to_product_reference":"openEuler-24.03-LTS-SP1", "product_reference":"libwinpr-devel-2.11.8-3.oe2403sp1.aarch64.rpm", "full_product_name":{ "product_id":"openEuler-24.03-LTS-SP1:libwinpr-devel-2.11.8-3.oe2403sp1.aarch64", "name":"libwinpr-devel-2.11.8-3.oe2403sp1.aarch64 as a component of openEuler-24.03-LTS-SP1" }, "category":"default_component_of" } ] }, "vulnerabilities":[ { "cve":"CVE-2026-26965", "notes":[ { "text":"FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, in the RLE planar decode path, `planar_decompress_plane_rle()` writes into `pDstData` at `((nYDst+y) * nDstStep) + (4*nXDst) + nChannel` without verifying that `(nYDst+nSrcHeight)` fits in the destination height or that `(nXDst+nSrcWidth)` fits in the destination stride. When `TempFormat != DstFormat`, `pDstData` becomes `planar->pTempData` (sized for the desktop), while `nYDst` is only validated against the **surface** by `is_within_surface()`. A malicious RDP server can exploit this to perform a heap out-of-bounds write with attacker-controlled offset and pixel data on any connecting FreeRDP client. The OOB write reaches up to 132,096 bytes past the temp buffer end, and on the brk heap (desktop ≤ 128×128), an adjacent `NSC_CONTEXT` struct's `decode` function pointer is overwritten with attacker-controlled pixel data — control-flow–relevant corruption (function pointer overwritten) demonstrated under deterministic heap layout (`nsc->decode = 0xFF414141FF414141`). Version 3.23.0 fixes the vulnerability.", "category":"description", "title":"Vulnerability Description" } ], "product_status":{ "fixed":{ "$ref":"$.vulnerabilities[0].product_status.fixed" } }, "remediations":[ { "product_ids":{ "$ref":"$.vulnerabilities[0].product_status.fixed" }, "details":"freerdp security update", "category":"vendor_fix", "url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2040" } ], "scores":[ { "cvss_v3":{ "baseSeverity":"HIGH", "baseScore":8.8, "vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "version":"3.1" }, "products":{ "$ref":"$.vulnerabilities[0].product_status.fixed" } } ], "threats":[ { "details":"High", "category":"impact" } ], "title":"CVE-2026-26965" } ] }