Detections
Analytics
CVE-2026-33984
high
Description
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.
References
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33984.json
https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8469-2xcx-frf6
https://github.com/FreeRDP/FreeRDP/commit/dc7fdb165095139be779a4000199bc1706b06ad5
https://bugzilla.redhat.com/show_bug.cgi?id=2453219
https://access.redhat.com/security/cve/CVE-2026-33984
https://access.redhat.com/errata/RHSA-2026:9656
https://access.redhat.com/errata/RHSA-2026:8945
https://access.redhat.com/errata/RHSA-2026:8458
https://access.redhat.com/errata/RHSA-2026:8457
https://access.redhat.com/errata/RHSA-2026:19349
https://access.redhat.com/errata/RHSA-2026:19033
https://access.redhat.com/errata/RHSA-2026:12388
https://access.redhat.com/errata/RHSA-2026:12359
https://access.redhat.com/errata/RHSA-2026:11651
https://access.redhat.com/errata/RHSA-2026:11649
https://access.redhat.com/errata/RHSA-2026:11336
https://access.redhat.com/errata/RHSA-2026:11333