CVE-2026-26965

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Source
https://cve.org/CVERecord?id=CVE-2026-26965
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-26965.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-26965
Aliases
  • GHSA-5vgf-mw4f-r33h
Downstream
Related
Published
2026-02-25T20:59:17.828Z
Modified
2026-04-11T03:29:16.564043Z
Severity
  • 8.8 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
Summary
FreeRDP has Out-of-bounds Write
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->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.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-787"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26965.json"
}
References

Affected packages

Git / github.com/freerdp/freerdp

Affected ranges

Type
GIT
Repo
https://github.com/freerdp/freerdp
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
b933ae18d9ad2a1d73c610868fcc30eb61654070
Fixed
a0be5cb87d760bb1c803ad1bb835aa1e73e62abc
Database specific 
{
    "versions": [
        {
            "introduced": "0"
        },
        {
            "fixed": "3.23.0"
        }
    ]
}

Affected versions

1.*
1.0-beta1
1.0-beta2
1.0-beta4
1.0-beta5
1.0.0
1.0.1
1.1.0-beta+2013071101
1.1.0-beta1
1.1.0-beta1+android2
1.1.0-beta1+android3
1.1.0-beta1+android4
1.1.0-beta1+android5
1.1.0-beta1+ios1
1.1.0-beta1+ios2
1.1.0-beta1+ios3
1.1.0-beta1+ios4
1.2.0-beta1+android7
1.2.0-beta1+android9
2.*
2.0.0
2.0.0-beta1+android10
2.0.0-beta1+android11
2.0.0-rc0
2.0.0-rc1
2.0.0-rc2
2.0.0-rc3
2.0.0-rc4
3.*
3.0.0
3.0.0-beta1
3.0.0-beta2
3.0.0-beta3
3.0.0-beta4
3.0.0-rc0
3.1.0
3.2.0
3.3.0
3.4.0
3.5.0
3.5.1

Database specific

vanir_signatures_modified 
"2026-04-11T03:29:16Z"
source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-26965.json"
vanir_signatures 
[
    {
        "target": {
            "file": "libfreerdp/codec/planar.c"
        },
        "signature_version": "v1",
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "230404328755052612117100792242279847009",
                "219593616325865066555522329579803666192",
                "28534761997125986975824167068864609176",
                "187290154479599502016860071192389159910",
                "251808060201614952069729567090186929708",
                "134195184515631534545394903080960326961",
                "105899215744722344442582069370483357347",
                "192857596324214854618089700992196040489",
                "122161517804884565820976105431098500263"
            ]
        },
        "id": "CVE-2026-26965-77b59768",
        "source": "https://github.com/freerdp/freerdp/commit/a0be5cb87d760bb1c803ad1bb835aa1e73e62abc",
        "signature_type": "Line"
    }
]