CVE-2026-22856

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{"bugzilla": {"description": "freerdp: FreeRDP heap-use-after-free", "id": "2429650", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2429650"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.6", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L", "status": "draft"}, "cwe": "(CWE-362|CWE-416)", "details": ["No description is available for this CVE."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2026-22856", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Fix deferred", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "freerdp", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-01-14T17:53:04Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-22856\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-22856\nhttps://github.com/FreeRDP/FreeRDP/releases/tag/3.20.1\nhttps://github.com/FreeRDP/FreeRDP/security/advisories/GHSA-w842-c386-fxhv"], "threat_severity": "Moderate"}

{"analysis": {"en": {"generated_at": "2026-04-18T19:57:46.221297+00:00", "value": {"mitigation_remediation": ["Upgrade FreeRDP to version 3.20.1 or later to apply the fix.", "If an upgrade is not possible, disable or restrict use of the serial channel on affected clients.", "Limit RDP connections to trusted hosts, enforce strict authentication, and monitor for anomalous traffic that could indicate race condition attempts."], "summary": {"action": "Patch", "impact": "Memory corruption"}, "threat_synthesis": {"affected_systems": "The vulnerability affects all installations of FreeRDP before version 3.20.1. It applies to the open\u2011source Remote Desktop Protocol implementation distributed under the FreeRDP umbrella.", "description_and_impact": "A race condition in FreeRDP\u2019s serial channel IRP thread tracking can cause a heap use\u2011after\u2011free. When one thread removes an entry from the serial->IrpThreads list while another thread reads it, an invalid pointer may be dereferenced, which may corrupt memory or cause a crash. The flaw matches CWE\u2011416 and CWE\u2011362.", "risk_and_exploitability": "The CVSS score of 6.8 indicates moderate severity, and an EPSS score of less than 1% suggests a low probability of exploitation. The flaw is not listed in the CISA KEV catalog. The likely attack vector is inferred from the description and not directly stated. Practical exploitation would likely require an attacker to initiate a carefully timed RDP session that triggers the serial channel race, requiring concurrent access to the client\u2019s thread pool and precise synchronization of removal and read operations."}}}}, "created": "2026-01-15T08:03:13.808078+00:00", "updated": "2026-04-18T20:00:09.327791+00:00", "vendors": ["freerdp", "freerdp$PRODUCT$freerdp"]}