CVE-2026-91945

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{"bugzilla": {"description": "FreeRDP: FreeRDP: Denial of Service due to out-of-bounds read in smartcard response processing", "id": "2533965", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2533965"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["A flaw was found in FreeRDP. Authenticated RDP clients can exploit an out-of-bounds read vulnerability in smartcard response decoders. This occurs because the decoders fail to validate the length of Answer to Reset (ATR) fields against fixed inline arrays. By sending oversized ATR lengths, an attacker can trigger reads past memory objects, leading to process termination and a denial of service."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, disable smartcard redirection when connecting to RDP servers using FreeRDP. This can typically be achieved by using the `--disable-smartcard` command-line option for `xfreerdp` or similar configuration in other FreeRDP-based clients. Disabling smartcard redirection may impact functionality that relies on smartcard authentication or access within the RDP session."}, "name": "CVE-2026-91945", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "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": "2026-09-15T15:18:04Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-91945\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-91945\nhttps://github.com/FreeRDP/FreeRDP/commit/9626564421df72c84f891afdbc0b20bf702f369f\nhttps://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-q65v-4w7q-hx3r\nhttps://www.vulncheck.com/advisories/freerdp-before-3.31.0-out-of-bounds-read-via-smartcard-atr"], "threat_severity": "Moderate"}

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