CVE-2026-109948

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{"bugzilla": {"description": "freerdp: FreeRDP 3.0.0 before 3.32.0 Memory Disclosure via SCardTransmit Smartcard Redirection", "id": "2550533", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2550533"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N", "status": "draft"}, "cwe": "CWE-200", "details": ["FreeRDP from 3.0.0 before 3.32.0 contains an uninitialized memory disclosure vulnerability in smartcard_Transmit_Call that allows malicious RDP servers to read client memory. Servers can send SCardTransmit requests with an invalid card handle and nonzero receive length, causing smartcard_pack_transmit_return to serialize up to 66,560 uninitialized heap bytes.", "A flaw was found in FreeRDP. When a user connects to a malicious Remote Desktop Protocol (RDP) server with smartcard redirection enabled, the server can issue a crafted smartcard transmission request with an invalid card handle. Because FreeRDP fails to properly clear or restrict the response buffer upon encountering this error, uninitialized client memory is serialized and returned to the server. This issue allows a malicious server to access sensitive client heap data, resulting in information disclosure."], "mitigation": {"lang": "en:us", "value": "If smartcard redirection is not required, disable it on the FreeRDP client. Restrict connections to trusted RDP servers."}, "name": "CVE-2026-109948", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "impact": "moderate", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-10-13T13:27:15Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-109948\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-109948\nhttps://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-f554-v4xw-5j39\nhttps://www.vulncheck.com/advisories/freerdp-3.0.0-before-3.32.0-memory-disclosure-via-scardtransmit-smartcard-redirection"], "statement": "This flaw is rated Moderate because a malicious RDP peer can disclose uninitialized client memory via smartcard SCardTransmit from the FreeRDP client process. The user must connect to the malicious server (UI:R). There is no direct integrity or availability impact from this issue alone. Memory hardening (ASLR/FORTIFY) does not eliminate the disclosure.", "threat_severity": "Moderate"}

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