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alsa-2026:8458
Vulnerability from osv_almalinux
Published
2026-04-16 00:00
Modified
2026-04-17 09:35
Summary
Important: freerdp security update
Details
FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. The xfreerdp client can connect to RDP servers such as Microsoft Windows machines, xrdp, and VirtualBox.
Security Fix(es):
- FreeRDP: FreeRDP: Heap buffer overflow allows arbitrary code execution via crafted pixel data (CVE-2026-33984)
- FreeRDP: FreeRDP: Denial of Service via specially crafted Remote Desktop Protocol messages (CVE-2026-33983)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
References
{
"affected": [
{
"package": {
"ecosystem": "AlmaLinux:10",
"name": "freerdp"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:3.10.3-5.el10_1.6"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
"ecosystem": "AlmaLinux:10",
"name": "freerdp-devel"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:3.10.3-5.el10_1.6"
}
],
"type": "ECOSYSTEM"
}
]
},
{
"package": {
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"name": "freerdp-libs"
},
"ranges": [
{
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},
{
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}
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{
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{
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"name": "libwinpr"
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],
"details": "FreeRDP is a free implementation of the Remote Desktop Protocol (RDP), released under the Apache license. The xfreerdp client can connect to RDP servers such as Microsoft Windows machines, xrdp, and VirtualBox. \n\nSecurity Fix(es): \n\n * FreeRDP: FreeRDP: Heap buffer overflow allows arbitrary code execution via crafted pixel data (CVE-2026-33984)\n * FreeRDP: FreeRDP: Denial of Service via specially crafted Remote Desktop Protocol messages (CVE-2026-33983)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
"id": "ALSA-2026:8458",
"modified": "2026-04-17T09:35:48Z",
"published": "2026-04-16T00:00:00Z",
"references": [
{
"type": "ADVISORY",
"url": "https://access.redhat.com/errata/RHSA-2026:8458"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-33983"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-33984"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2453219"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2453220"
},
{
"type": "ADVISORY",
"url": "https://errata.almalinux.org/10/ALSA-2026-8458.html"
}
],
"related": [
"CVE-2026-33984",
"CVE-2026-33983"
],
"summary": "Important: freerdp security update"
}
CVE-2026-33983 (GCVE-0-2026-33983)
Vulnerability from cvelistv5 – Published: 2026-03-30 21:42 – Updated: 2026-06-30 12:09
VLAI
EPSS
Title
FreeRDP: Progressive Codec Quant BYTE Underflow - UB + CPU DoS
Summary
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, progressive_decompress_tile_upgrade() detects a mismatch via progressive_rfx_quant_cmp_equal() but only emits WLog_WARN, execution continues. The wrapped value (247) is used as a shift exponent, causing undefined behavior and an approximately 80 billion iteration loop (CPU DoS). This issue has been patched in version 3.24.2.
Severity
6.5 (Medium)
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
19 references
| URL | Tags |
|---|---|
| https://github.com/FreeRDP/FreeRDP/security/advis… | x_refsource_CONFIRM |
| https://github.com/FreeRDP/FreeRDP/commit/78188ab… | x_refsource_MISC |
| https://access.redhat.com/security/cve/CVE-2026-33983 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2453220 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:11333 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:8458 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:19033 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:8945 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:11651 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:11649 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:12388 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:12359 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:11332 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:11336 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:10709 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:9656 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:8457 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:19349 | vendor-advisoryx_refsource_REDHAT |
Impacted products
25 products
| Vendor | Product | Version | |
|---|---|---|---|
| FreeRDP | FreeRDP |
Affected:
< 3.24.2
|
|
| Red Hat | Red Hat Enterprise Linux AppStream EUS (v. 10.0) |
cpe:/o:redhat:enterprise_linux_eus:10.0 |
|
| Red Hat | Red Hat Enterprise Linux AppStream (v. 10) |
cpe:/o:redhat:enterprise_linux:10.1 cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux AppStream (v. 8) |
cpe:/a:redhat:enterprise_linux:8::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream AUS (v. 8.2) |
cpe:/a:redhat:rhel_aus:8.2::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream AUS (v.8.4) |
cpe:/a:redhat:rhel_aus:8.4::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) |
cpe:/a:redhat:rhel_eus_long_life:8.4::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream AUS (v.8.6) |
cpe:/a:redhat:rhel_aus:8.6::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream E4S (v.8.6) |
cpe:/a:redhat:rhel_e4s:8.6::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream TUS (v.8.6) |
cpe:/a:redhat:rhel_tus:8.6::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream E4S (v.8.8) |
cpe:/a:redhat:rhel_e4s:8.8::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream TUS (v.8.8) |
cpe:/a:redhat:rhel_tus:8.8::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream E4S (v.9.0) |
cpe:/a:redhat:rhel_e4s:9.0::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream E4S (v.9.2) |
cpe:/a:redhat:rhel_e4s:9.2::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream EUS (v.9.4) |
cpe:/a:redhat:rhel_eus:9.4::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream EUS (v.9.6) |
cpe:/a:redhat:rhel_eus:9.6::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream (v. 9) |
cpe:/a:redhat:enterprise_linux:9::appstream |
|
| Red Hat | Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) |
cpe:/o:redhat:enterprise_linux_eus:10.0 |
|
| Red Hat | Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) |
cpe:/o:redhat:enterprise_linux:10.1 cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux CRB (v. 8) |
cpe:/a:redhat:enterprise_linux:8::crb |
|
| Red Hat | Red Hat CodeReady Linux Builder EUS (v.9.4) |
cpe:/a:redhat:rhel_eus:9.4::crb |
|
| Red Hat | Red Hat CodeReady Linux Builder EUS (v.9.6) |
cpe:/a:redhat:rhel_eus:9.6::crb |
|
| Red Hat | Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) |
cpe:/a:redhat:enterprise_linux:9::crb |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6 |
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7 |
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CVE-2026-33984 (GCVE-0-2026-33984)
Vulnerability from cvelistv5 – Published: 2026-03-30 21:42 – Updated: 2026-06-30 12:09
VLAI
EPSS
Title
FreeRDP: ClearCodec resize_vbar_entry() Heap OOB Write
Summary
FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, in resize_vbar_entry() in libfreerdp/codec/clear.c, vBarEntry->size is updated to vBarEntry->count before the winpr_aligned_recalloc() call. If realloc fails, size is inflated while pixels still points to the old, smaller buffer. On a subsequent call where count <= size (the inflated value), realloc is skipped. The caller then writes count * bpp bytes of attacker-controlled pixel data into the undersized buffer, causing a heap buffer overflow. This issue has been patched in version 3.24.2.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator (v2.0.3)
Assigner
References
19 references
| URL | Tags |
|---|---|
| https://github.com/FreeRDP/FreeRDP/security/advis… | x_refsource_CONFIRM |
| https://github.com/FreeRDP/FreeRDP/commit/dc7fdb1… | x_refsource_MISC |
| https://access.redhat.com/security/cve/CVE-2026-33984 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2453219 | issue-trackingx_refsource_REDHAT |
| https://security.access.redhat.com/data/csaf/v2/v… | x_sadp-csaf-vex |
| https://access.redhat.com/errata/RHSA-2026:11333 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:8458 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:19033 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:8945 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:11651 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:11649 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:12388 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:12359 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:11332 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:11336 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:10709 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:9656 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:8457 | vendor-advisoryx_refsource_REDHAT |
| https://access.redhat.com/errata/RHSA-2026:19349 | vendor-advisoryx_refsource_REDHAT |
Impacted products
25 products
| Vendor | Product | Version | |
|---|---|---|---|
| FreeRDP | FreeRDP |
Affected:
< 3.24.2
|
|
| Red Hat | Red Hat Enterprise Linux AppStream EUS (v. 10.0) |
cpe:/o:redhat:enterprise_linux_eus:10.0 |
|
| Red Hat | Red Hat Enterprise Linux AppStream (v. 10) |
cpe:/o:redhat:enterprise_linux:10.1 cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux AppStream (v. 8) |
cpe:/a:redhat:enterprise_linux:8::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream AUS (v. 8.2) |
cpe:/a:redhat:rhel_aus:8.2::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream AUS (v.8.4) |
cpe:/a:redhat:rhel_aus:8.4::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4) |
cpe:/a:redhat:rhel_eus_long_life:8.4::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream AUS (v.8.6) |
cpe:/a:redhat:rhel_aus:8.6::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream E4S (v.8.6) |
cpe:/a:redhat:rhel_e4s:8.6::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream TUS (v.8.6) |
cpe:/a:redhat:rhel_tus:8.6::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream E4S (v.8.8) |
cpe:/a:redhat:rhel_e4s:8.8::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream TUS (v.8.8) |
cpe:/a:redhat:rhel_tus:8.8::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream E4S (v.9.0) |
cpe:/a:redhat:rhel_e4s:9.0::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream E4S (v.9.2) |
cpe:/a:redhat:rhel_e4s:9.2::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream EUS (v.9.4) |
cpe:/a:redhat:rhel_eus:9.4::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream EUS (v.9.6) |
cpe:/a:redhat:rhel_eus:9.6::appstream |
|
| Red Hat | Red Hat Enterprise Linux AppStream (v. 9) |
cpe:/a:redhat:enterprise_linux:9::appstream |
|
| Red Hat | Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) |
cpe:/o:redhat:enterprise_linux_eus:10.0 |
|
| Red Hat | Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) |
cpe:/o:redhat:enterprise_linux:10.1 cpe:/o:redhat:enterprise_linux:10.2 |
|
| Red Hat | Red Hat Enterprise Linux CRB (v. 8) |
cpe:/a:redhat:enterprise_linux:8::crb |
|
| Red Hat | Red Hat CodeReady Linux Builder EUS (v.9.4) |
cpe:/a:redhat:rhel_eus:9.4::crb |
|
| Red Hat | Red Hat CodeReady Linux Builder EUS (v.9.6) |
cpe:/a:redhat:rhel_eus:9.6::crb |
|
| Red Hat | Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) |
cpe:/a:redhat:enterprise_linux:9::crb |
|
| Red Hat | Red Hat Enterprise Linux 6 |
cpe:/o:redhat:enterprise_linux:6 |
|
| Red Hat | Red Hat Enterprise Linux 7 |
cpe:/o:redhat:enterprise_linux:7 |
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{
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"value": "RHSA-2026:8457: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)"
},
{
"lang": "en",
"value": "RHSA-2026:19349: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-03-30T22:01:24.523Z",
"value": "Reported to Red Hat."
},
{
"lang": "en",
"time": "2026-03-30T21:42:57.090Z",
"value": "Made public."
}
],
"title": "FreeRDP: FreeRDP: Heap buffer overflow allows arbitrary code execution via crafted pixel data",
"workarounds": [
{
"lang": "en",
"value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."
}
],
"x_adpType": "supplier",
"x_generator": {
"engine": "sadp-cli 1.0.0"
}
}
],
"cna": {
"affected": [
{
"product": "FreeRDP",
"vendor": "FreeRDP",
"versions": [
{
"status": "affected",
"version": "\u003c 3.24.2"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, in resize_vbar_entry() in libfreerdp/codec/clear.c, vBarEntry-\u003esize is updated to vBarEntry-\u003ecount before the winpr_aligned_recalloc() call. If realloc fails, size is inflated while pixels still points to the old, smaller buffer. On a subsequent call where count \u003c= size (the inflated value), realloc is skipped. The caller then writes count * bpp bytes of attacker-controlled pixel data into the undersized buffer, causing a heap buffer overflow. This issue has been patched in version 3.24.2."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-122",
"description": "CWE-122: Heap-based Buffer Overflow",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-131",
"description": "CWE-131: Incorrect Calculation of Buffer Size",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-03-30T21:42:57.090Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8469-2xcx-frf6",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8469-2xcx-frf6"
},
{
"name": "https://github.com/FreeRDP/FreeRDP/commit/dc7fdb165095139be779a4000199bc1706b06ad5",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/FreeRDP/FreeRDP/commit/dc7fdb165095139be779a4000199bc1706b06ad5"
}
],
"source": {
"advisory": "GHSA-8469-2xcx-frf6",
"discovery": "UNKNOWN"
},
"title": "FreeRDP: ClearCodec resize_vbar_entry() Heap OOB Write"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-33984",
"datePublished": "2026-03-30T21:42:57.090Z",
"dateReserved": "2026-03-24T22:20:06.211Z",
"dateUpdated": "2026-06-30T12:09:18.125Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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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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