CVE-2026-85089FreeRDP before 3.31.0 Information Disclosure via uninitialized heap memory
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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FreeRDP versions 3.0.0 through 3.30.0 (before 3.31.0) transmit uninitialized heap memory in Save Session Info PDU reserved padding fields. Three PDU writers in libfreerdp/core/info.c (rdp_write_logon_info_v2, rdp_write_logon_info_plain, and rdp_write_logon_info_ex) use Stream_Seek instead of Stream_Zero for reserved pad bytes (up to 576 bytes), leaving previously freed heap contents in the outgoing PDU. Because the send buffer is allocated with malloc (not zeroed), stale heap data — which may include cleartext credentials from prior sessions — can be sent to the receiving peer. FreeRDP-based servers using rdpUpdate::SaveSessionInfo and freerdp-proxy (which forwards these PDUs) are affected, allowing disclosure of server/proxy process memory to a downstream client.
- CVSS
- 6.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-908
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulnCheck
- NVD analysis
- Analyzed
- Record last updated
- Sep 3, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
FreeRDP FreeRDP freerdp:freerdp (from the name) | from 3.0.0 before 3.31.0; 3.31.0 not affected | CNA record |
freerdp freerdp freerdp:freerdp | from 3.0.0 before 3.31.0 | NVD |
References
- https://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-v649-94v2-p72qvendor-advisory, exploit, mitigation
- https://github.com/FreeRDP/FreeRDP/commit/056cede398d71c1f2540baebc26ec3327a249301patch
- https://github.com/FreeRDP/FreeRDP/commit/483c9388119f06bac420d92053cff9ef94e83beapatch
- https://github.com/FreeRDP/FreeRDP/releases/tag/3.31.0release-notes, product
- https://github.com/FreeRDP/FreeRDP/blob/3.30.0/libfreerdp/core/info.c#L1541technical-description, product
- https://github.com/FreeRDP/FreeRDPproduct
- https://www.vulncheck.com/advisories/freerdp-before-3.31.0-information-disclosure-via-uninitialized-heap-memorythird-party-advisory, patch, release-notes
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.