RHSA-2026:12359 Red Hat Security Advisory: freerdp security update
Details
CVSS v3
7.5
NVD published
2026-03-30 22:16:19
EPSS
<0.1% probability · 15.2th percentile — 2026-05-01
Affected versions
cpe:2.3:a:freerdp:freerdp:*:*:*:*:*:*:*:*
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.
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