High [CVE-2026-111881] Denial of Service via crafted clipboard bitmap image
This high-severity Red Hat Linux advisory covers CVE-2026-111881; related products: Red Hat Enterprise Linux 10, Red Hat package: freerdp.
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Summary
Denial of Service via crafted clipboard bitmap image. Red Hat rates this important (CVSS 7.6).
Weakness: CWE-191.
Affected products named by the advisory: Red Hat Enterprise Linux 10; Red Hat package: freerdp.
- < 3.14.1
- < 3.32.0
Official advisory · high-confidence parse· fetched 12 days ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists. Confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 12 days ago·verify at source
Mitigation checklist
- Connect FreeRDP clients only to trusted remote peers and avoid accepting clipboard content from untrusted RDP sessions. If clipboard redirection is not needed, disable clipboard sharing in the FreeRDP client. --- CME Mitigation Guidance (2026-10-20) --- Disclaimer: The following mitigation solutions are provided as a courtesy, pending the application of an official patch. This content was generated utilizing AI tools in conjunction with data from https://cmetaxonomy.org. Customers are advised to independently evaluate and test these temporary mitigations within their own infrastructure. The highest-value action is to disable clipboard redirection in FreeRDP client sessions connecting to untrusted RDP peers to prevent WinPR BMP writer stride underflow during sub-byte image synthesis: upgrade to FreeRDP 3.32.0 (or the fixed Freerdp builds), which correct sub-byte stride calculation in the BMP writer to match four-byte alignment and prevent underflow before calling Stream_Zero, closing all 2 injection vectors (crafted 1-bpp bitmap returned via RDP clipboard channel, clipboard image synthesis for CF_DIB or CF_DIBV5 formats). Until patched, this is a concern on FreeRDP client hosts connecting to untrusted RDP peers with clipboard redirection enabled, so connect FreeRDP clients only to trusted remote peers and disable clipboard sharing or avoid requesting clipboard image data in CF_DIB or CF_DIBV5 formats from untrusted RDP sessions. These controls limit blast radius and contain exploitation, but they do not fix the underlying integer underflow defect — apply the upstream patch to fully remediate. Highest-impact CME: CME-119 Compiler Integer Overflow and Conversion Safety (-ftrapv / UBSan Integer) (high)
Official advisory · high-confidence parse· fetched 12 days ago·verify at source
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