{"id":"UBUNTU-CVE-2026-26965","details":"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-\u003epTempData` (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-\u003edecode = 0xFF414141FF414141`). Version 3.23.0 fixes the vulnerability.","modified":"2026-03-19T08:32:04.471978Z","published":"2026-02-25T21:16:00Z","related":["USN-8105-1"],"upstream":["CVE-2026-26965"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-26965"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-26965"},{"type":"REPORT","url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-5vgf-mw4f-r33h"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-8105-1"}],"affected":[{"package":{"name":"freerdp","ecosystem":"Ubuntu:16.04:LTS","purl":"pkg:deb/ubuntu/freerdp@1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4?arch=source&distro=xenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1","1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.2","1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.3","1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"],"ecosystem_specific":{"binaries":[{"binary_name":"freerdp-x11","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libfreerdp-cache1.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libfreerdp-client1.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libfreerdp-codec1.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libfreerdp-common1.1.0","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libfreerdp-core1.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libfreerdp-crypto1.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libfreerdp-dev","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libfreerdp-gdi1.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libfreerdp-locale1.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libfreerdp-plugins-standard","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libfreerdp-primitives1.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libfreerdp-rail1.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libfreerdp-utils1.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-asn1-0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-bcrypt0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-credentials0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-credui0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-crt0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-crypto0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-dev","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-dsparse0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-environment0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-error0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-file0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-handle0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-heap0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-input0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-interlocked0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-io0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-library0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-path0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-pipe0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-pool0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-registry0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-rpc0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-sspi0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-sspicli0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-synch0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"binary_name":"libwinpr-sysinfo0.1","binary_version":"1.1.0~git20140921.1.440916e+dfsg1-5ubuntu1.4"},{"b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