{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-54538 in the wild and no public exploit code.","fix":"Upgrade to a fixed version.","what":"CVE-2026-54538 is a high-severity denial of service vulnerability in neutrinolabs xrdp, published on 20 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-54538 and fix it if it is affected.\n\nWhat it is: CVE-2026-54538 is a high-severity denial of service vulnerability in neutrinolabs xrdp, published on 20 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-54538 in the wild and no public exploit code.\n\nAffected product: neutrinolabs xrdp. No package-level version data is available, so check the vendor advisory linked from the reference page.\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-54538/ (Markdown: https://insights.sbomify.com/CVE-2026-54538/index.md)","id":"CVE-2026-54538","markdown":"https://insights.sbomify.com/CVE-2026-54538/index.md","name":"CVE-2026-54538","record":{"aliases":["DEBIAN-CVE-2026-54538","GHSA-9j3q-9mvw-qv7j","UBUNTU-CVE-2026-54538"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"RDP server","requires_auth":"none","summary":"Unauthenticated attackers can cause a denial of service in xrdp by sending crafted packets that trigger an infinite loop, exhausting CPU resources.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"xrdp","vendor":"neutrinolabs"}],"cvss":{"score":7.5,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-835","name":"Loop with Unreachable Exit Condition"}],"description":"xrdp is an open source RDP server. In versions 0.10.6 and prior, a n issue was discovered where the software fails to properly validate the totalLength field within the RDP protocol control header during packet reception. An unauthenticated remote attacker can exploit this vulnerability by sending a specially crafted packet that forces the xrdp process or thread into an infinite, CPU-bound loop. Because the internal pointer fails to advance and the deadlock prevention mechanism is bypassed for specific protocol data unit types, the process consumes excessive CPU resources indefinitely. This can render the xrdp service unavailable and potentially lead to system-wide resource exhaustion if multiple malicious connections are established. This issue has been fixed in version 0.10.6.1.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"xrdp: Pre-auth infinite loop via totalLength=0 in TS_SHARECONTROLHEADER","id":"CVE-2026-54538","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":2,"next":{"headline":"Authenticated terminal command whitelist bypass in Pheditor","id":"CVE-2026-54540"},"packages":[],"prev":{"headline":"vantage6 node has an Improper Access Control issue","id":"CVE-2026-54533"},"products":["xrdp"],"published":"2026-07-20","related":[{"cvss_score":9.8,"headline":"xrdp: lib_palette_update Heap Buffer Overflow \u0026 RCE","id":"CVE-2026-41252","kev_date_added":null,"published":"2026-07-20"},{"cvss_score":9.3,"headline":"xrdp: RDP MAC signature (dataSignature) never verified on receive — integrity bypass in non-TLS mode","id":"CVE-2026-32105","kev_date_added":null,"published":"2026-04-17"},{"cvss_score":8.8,"headline":"xrdp: Channel Data Forwarding Fixed-Size Buffer Overflow","id":"CVE-2026-44178","kev_date_added":null,"published":"2026-07-20"},{"cvss_score":8.8,"headline":"xrdp: Fail-open privilege drop in sesexec — child processes may execute as root if setuid fails","id":"CVE-2026-32107","kev_date_added":null,"published":"2026-04-17"},{"cvss_score":8.7,"headline":"xrdp: Pre-authentication out-of-bounds reads in channel parsers","id":"CVE-2026-33689","kev_date_added":null,"published":"2026-04-17"},{"cvss_score":8.7,"headline":"xrdp: Heap buffer overflow in EGFX channel","id":"CVE-2026-35512","kev_date_added":null,"published":"2026-04-17"},{"cvss_score":8.2,"headline":"xrdp: lib_framebuffer_update Has Integer Overflow Heap Info Leak \u0026 ASLR Bypass","id":"CVE-2026-41521","kev_date_added":null,"published":"2026-07-20"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-07-20","vendors":["neutrinolabs"]},"summary":"Unauthenticated attackers can cause a denial of service in xrdp by sending crafted packets that trigger an infinite loop, exhausting CPU resources.","url":"https://insights.sbomify.com/CVE-2026-54538/"}