CVE-2026-33986

FreeRDP is a free implementation of the Remote Desktop Protocol. Prior to version 3.24.2, in yuv_ensure_buffer() in libfreerdp/codec/h264.c, h264->width and h264->height are updated before the reallocation loop. If any winpr_aligned_recalloc() call fails, the function returns FALSE but width/height are already inflated. This issue has been patched in version 3.24.2.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.6 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/FreeRDP/FreeRDP/commit/f6e43e208958140074ae9bb93cd0c9045a371c77	Patch
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-h6qw-wxvm-hf97	Patch Vendor Advisory
https://access.redhat.com/security/cve/CVE-2026-33986
https://bugzilla.redhat.com/show_bug.cgi?id=2453221
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33986.json

Configurations

Configuration 1 (hide)

cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-03-30 22:16

Updated : 2026-07-15 02:20

NVD link : CVE-2026-33986

Mitre link : CVE-2026-33986

CVE.ORG link : CVE-2026-33986

JSON object : View

Products Affected

freerdp

freerdp

CWE

CWE-122

Heap-based Buffer Overflow

CWE-131

Incorrect Calculation of Buffer Size

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Este problema ha sido parcheado en la versi\u00f3n 3.24.2."}], "lastModified": "2026-07-15T02:20:27.440", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "03FF152C-C651-4586-8958-1555D9797516", "versionEndExcluding": "3.24.2"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}