{"id":"CVE-2026-33984","summary":"FreeRDP: ClearCodec resize_vbar_entry() Heap OOB Write","details":"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.","aliases":["GHSA-8469-2xcx-frf6"],"modified":"2026-08-18T18:39:58.558932Z","published":"2026-03-30T21:42:57.090Z","related":["ALSA-2026:8457","ALSA-2026:8458","ALSA-2026:8945","SUSE-SU-2026:21436-1","SUSE-SU-2026:3562-1","openSUSE-SU-2026:10633-1","openSUSE-SU-2026:20657-1"],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-122","CWE-131"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33984.json","unresolved_ranges":[{"extracted_events":[{"fixed":"3.24.2"}],"source":"AFFECTED_FIELD"}]},"references":[{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33984.json"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:10709"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:11332"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:11333"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:11336"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:11649"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:11651"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:12359"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:12388"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:19033"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:19349"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:8457"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:8458"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:8945"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:9656"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-33984"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33984.json"},{"type":"ADVISORY","url":"https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-8469-2xcx-frf6"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33984"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2453219"},{"type":"FIX","url":"https://github.com/FreeRDP/FreeRDP/commit/dc7fdb165095139be779a4000199bc1706b06ad5"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/freerdp/freerdp","events":[{"introduced":"0"},{"fixed":"dc7fdb165095139be779a4000199bc1706b06ad5"}],"database_specific":{"source":"REFERENCES"}}],"versions":["3.5.1","3.5.0","3.4.0","3.3.0","3.2.0","3.1.0","3.0.0","3.0.0-rc0","3.0.0-beta4","3.0.0-beta3","3.0.0-beta2","3.0.0-beta1","2.0.0","2.0.0-rc4","2.0.0-rc3","2.0.0-rc2","2.0.0-rc1","2.0.0-rc0","2.0.0-beta1+android11","2.0.0-beta1+android10","1.2.0-beta1+android9","1.2.0-beta1+android7","1.1.0-beta+2013071101","1.1.0-beta1+ios4","1.1.0-beta1+android5","1.1.0-beta1+android4","1.1.0-beta1+ios3","1.1.0-beta1+ios2","1.1.0-beta1+android3","1.1.0-beta1+android2","1.1.0-beta1+ios1","1.1.0-beta1","1.0.1","1.0.0","1.0-beta5","1.0-beta4","1.0-beta2","1.0-beta1"],"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-33984.json","vanir_signatures_modified":"2026-08-18T18:39:58Z","vanir_signatures":[{"deprecated":false,"digest":{"line_hashes":["255620317009823173716794771041383794154","45382684195642432902215227819199050758","37388766999991567979854639852611980240","261795573816620269820705386991962313160","215911420867761152498354173213009403257","332010693786912959878788595254727331335","36461259977012459159480986689834207710","49211117325874623436401642442358680092"],"threshold":0.9},"id":"CVE-2026-33984-cc313d21","signature_type":"Line","signature_version":"v1","source":"https://github.com/freerdp/freerdp/commit/dc7fdb165095139be779a4000199bc1706b06ad5","target":{"file":"libfreerdp/codec/clear.c"}}]}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H"}]}