SUSE-SU-2026:1635-1
Vulnerability from csaf_suse - Published: 2026-04-27 12:06 - Updated: 2026-04-27 12:06Summary
Security update for freerdp
Severity
Important
Notes
Title of the patch: Security update for freerdp
Description of the patch: This update for freerdp fixes the following issues:
- CVE-2026-25941: Out-of-Bounds Read in client RDPGFX channel via crafted `WIRE_TO_SURFACE_2` PDU (bsc#1258919).
- CVE-2026-25942: Global-buffer-overflow in `xf_rail_server_execute_result` (bsc#1258920).
- CVE-2026-25952: Heap-use-after-free in `xf_SetWindowMinMaxInfo` (bsc#1258921).
- CVE-2026-25953: Heap-use-after-free in `xf_AppUpdateWindowFromSurface` (bsc#1258923).
- CVE-2026-25954: Heap-use-after-free in `xf_rail_server_local_move_size` (bsc#1258924).
- CVE-2026-25997: Heap-use-after-free in `xf_clipboard_format_equal` (bsc#1258977).
- CVE-2026-26986: Heap-use-after-free in `rail_window_free` (bsc#1258967).
- CVE-2026-27015: Smartcard NDR alignment padding triggers reachable `WINPR_ASSERT` abort (bsc#1258987).
- CVE-2026-27951: Denial of service via endless blocking loop in `Stream_EnsureCapacity` (bsc#1258939).
- CVE-2026-29774: Missing bounds validation can cause a client-side heap buffer overflow (bsc#1259689).
- CVE-2026-29775: Malicious server can trigger a client-side heap out-of-bounds access (bsc#1259684).
- CVE-2026-29776: Missing length check can lead to an integer underflow (bsc#1259692).
- CVE-2026-31897: Missing length check can cause an out-of-bounds read (bsc#1259693).
Patchnames: SUSE-2026-1635,SUSE-SLE-SERVER-12-SP5-LTSS-2026-1635,SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-1635
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
4.3 (Medium)
Vendor Fix
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
5.3 (Medium)
Vendor Fix
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
5.3 (Medium)
Vendor Fix
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
5.3 (Medium)
Vendor Fix
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
5.3 (Medium)
Vendor Fix
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
5.3 (Medium)
Vendor Fix
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
5.3 (Medium)
Vendor Fix
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
6.5 (Medium)
Vendor Fix
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
5.9 (Medium)
Vendor Fix
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
5.3 (Medium)
Vendor Fix
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Vendor Fix
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Vendor Fix
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
5.3 (Medium)
Vendor Fix
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Vendor Fix
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
References
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{
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{
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"category": "external",
"summary": "CVE-2026-26986",
"url": "https://www.suse.com/security/cve/CVE-2026-26986"
},
{
"category": "external",
"summary": "SUSE Bug 1258967 for CVE-2026-26986",
"url": "https://bugzilla.suse.com/1258967"
}
],
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{
"category": "vendor_fix",
"details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
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{
"cvss_v3": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
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{
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],
"title": "CVE-2026-26986"
},
{
"cve": "CVE-2026-27015",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-27015"
}
],
"notes": [
{
"category": "general",
"text": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, a missing bounds check in `smartcard_unpack_read_size_align()` (`libfreerdp/utils/smartcard_pack.c:1703`) allows a malicious RDP server to crash the FreeRDP client via a reachable `WINPR_ASSERT` -\u003e `abort()`. The crash occurs in upstream builds where `WITH_VERBOSE_WINPR_ASSERT=ON` (default in FreeRDP 3.22.0 / current WinPR CMake defaults). Smartcard redirection must be explicitly enabled by the user (e.g., `xfreerdp /smartcard`; `/smartcard-logon` implies `/smartcard`). Version 3.23.0 fixes the issue.",
"title": "CVE description"
}
],
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"url": "https://www.suse.com/security/cve/CVE-2026-27015"
},
{
"category": "external",
"summary": "SUSE Bug 1258987 for CVE-2026-27015",
"url": "https://bugzilla.suse.com/1258987"
}
],
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{
"category": "vendor_fix",
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}
],
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{
"cvss_v3": {
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"version": "3.1"
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{
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},
{
"cve": "CVE-2026-27951",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-27951"
}
],
"notes": [
{
"category": "general",
"text": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.23.0, the function `Stream_EnsureCapacity` can create an endless blocking loop. This may affect all client and server implementations using `FreeRDP`. For practical exploitation this will only work on 32bit systems where the available physical memory is `\u003e= SIZE_MAX`. Version 3.23.0 contains a patch. No known workarounds are available.",
"title": "CVE description"
}
],
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"summary": "CVE-2026-27951",
"url": "https://www.suse.com/security/cve/CVE-2026-27951"
},
{
"category": "external",
"summary": "SUSE Bug 1258939 for CVE-2026-27951",
"url": "https://bugzilla.suse.com/1258939"
}
],
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{
"category": "vendor_fix",
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{
"cvss_v3": {
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],
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},
{
"cve": "CVE-2026-29774",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-29774"
}
],
"notes": [
{
"category": "general",
"text": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.24.0, a client-side heap buffer overflow occurs in the FreeRDP client\u0027s AVC420/AVC444 YUV-to-RGB conversion path due to missing horizontal bounds validation of H.264 metablock regionRects coordinates. In yuv.c, the clamp() function (line 347) only validates top/bottom against the surface/YUV height, but never checks left/right against the surface width. When avc420_yuv_to_rgb (line 67) computes destination and source pointers using rect-\u003eleft, it performs unchecked pointer arithmetic that can reach far beyond the allocated surface buffer. A malicious server sends a WIRE_TO_SURFACE_PDU_1 with AVC420 codec containing a regionRects entry where left greatly exceeds the surface width (e.g., left=60000 on a 128px surface). The H.264 bitstream decodes successfully, then yuv420_process_work_callback calls avc420_yuv_to_rgb which computes pDstPoint = pDstData + rect-\u003etop * nDstStep + rect-\u003eleft * 4, writing 16-byte SSE vectors 1888+ bytes past the allocated heap region. This vulnerability is fixed in 3.24.0.",
"title": "CVE description"
}
],
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},
{
"category": "external",
"summary": "SUSE Bug 1259689 for CVE-2026-29774",
"url": "https://bugzilla.suse.com/1259689"
}
],
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{
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{
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{
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{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-29775"
}
],
"notes": [
{
"category": "general",
"text": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.24.0, a client-side heap out-of-bounds read/write occurs in FreeRDP\u0027s bitmap cache subsystem due to an off-by-one boundary check in bitmap_cache_put. A malicious server can send a CACHE_BITMAP_ORDER (Rev1) with cacheId equal to maxCells, bypassing the guard and accessing cells[] one element past the allocated array. This vulnerability is fixed in 3.24.0.",
"title": "CVE description"
}
],
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"url": "https://www.suse.com/security/cve/CVE-2026-29775"
},
{
"category": "external",
"summary": "SUSE Bug 1259684 for CVE-2026-29775",
"url": "https://bugzilla.suse.com/1259684"
}
],
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{
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{
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]
}
],
"threats": [
{
"category": "impact",
"date": "2026-04-27T12:06:35Z",
"details": "low"
}
],
"title": "CVE-2026-29775"
},
{
"cve": "CVE-2026-29776",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-29776"
}
],
"notes": [
{
"category": "general",
"text": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.24.0, Integer Underflow in update_read_cache_bitmap_order Function of FreeRDP\u0027s Core Library This vulnerability is fixed in 3.24.0.",
"title": "CVE description"
}
],
"product_status": {
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},
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{
"category": "external",
"summary": "CVE-2026-29776",
"url": "https://www.suse.com/security/cve/CVE-2026-29776"
},
{
"category": "external",
"summary": "SUSE Bug 1259692 for CVE-2026-29776",
"url": "https://bugzilla.suse.com/1259692"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
"product_ids": [
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]
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 3.1,
"baseSeverity": "LOW",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L",
"version": "3.1"
},
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]
}
],
"threats": [
{
"category": "impact",
"date": "2026-04-27T12:06:35Z",
"details": "low"
}
],
"title": "CVE-2026-29776"
},
{
"cve": "CVE-2026-31884",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-31884"
}
],
"notes": [
{
"category": "general",
"text": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.24.0, division by zero in MS-ADPCM and IMA-ADPCM decoders when nBlockAlign is 0, leading to a crash. In libfreerdp/codec/dsp.c, both ADPCM decoders use size % block_size where block_size = context-\u003ecommon.format.nBlockAlign. The nBlockAlign value comes from the Server Audio Formats PDU on the RDPSND channel. The value 0 is not validated anywhere before reaching the decoder. When nBlockAlign = 0, the modulo operation causes a SIGFPE (floating point exception) crash. This vulnerability is fixed in 3.24.0.",
"title": "CVE description"
}
],
"product_status": {
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]
},
"references": [
{
"category": "external",
"summary": "CVE-2026-31884",
"url": "https://www.suse.com/security/cve/CVE-2026-31884"
},
{
"category": "external",
"summary": "SUSE Bug 1259680 for CVE-2026-31884",
"url": "https://bugzilla.suse.com/1259680"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
"product_ids": [
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]
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 5.3,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
"version": "3.1"
},
"products": [
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]
}
],
"threats": [
{
"category": "impact",
"date": "2026-04-27T12:06:35Z",
"details": "moderate"
}
],
"title": "CVE-2026-31884"
},
{
"cve": "CVE-2026-31897",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-31897"
}
],
"notes": [
{
"category": "general",
"text": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to 3.24.0, there is an out-of-bounds read in freerdp_bitmap_decompress_planar when SrcSize is 0. The function dereferences *srcp (which points to pSrcData) without first verifying that SrcSize \u003e= 1. When SrcSize is 0 and pSrcData is non-NULL, this reads one byte past the end of the source buffer. This vulnerability is fixed in 3.24.0.",
"title": "CVE description"
}
],
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"summary": "CVE-2026-31897",
"url": "https://www.suse.com/security/cve/CVE-2026-31897"
},
{
"category": "external",
"summary": "SUSE Bug 1259693 for CVE-2026-31897",
"url": "https://bugzilla.suse.com/1259693"
}
],
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{
"category": "vendor_fix",
"details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
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],
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{
"cvss_v3": {
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"baseSeverity": "LOW",
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"version": "3.1"
},
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],
"threats": [
{
"category": "impact",
"date": "2026-04-27T12:06:35Z",
"details": "low"
}
],
"title": "CVE-2026-31897"
}
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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