{"answers":{"affected":"It affects 3 products.","exploited":"There is no known exploitation of CVE-2021-3653 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2021-3653 is a high-severity vulnerability in Debian Debian Linux, published on 29 Sep 2021. It can only be exploited from the same machine or local network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2021-3653 and fix it if it is affected.\n\nWhat it is: CVE-2021-3653 is a high-severity vulnerability in Debian Debian Linux, published on 29 Sep 2021. It can only be exploited from the same machine or local network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2021-3653 in the wild and no public exploit code.\n\nAffected product: Debian Debian Linux. 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-2021-3653/ (Markdown: https://insights.sbomify.com/CVE-2021-3653/index.md)","id":"CVE-2021-3653","markdown":"https://insights.sbomify.com/CVE-2021-3653/index.md","name":"CVE-2021-3653","record":{"aliases":["ALSA-2021:3548","AZL-6575","DEBIAN-CVE-2021-3653","GHSA-g58x-c6rr-7fp2","RHSA-2021:3547","RHSA-2021:3548","RLSA-2021:3547","RLSA-2021:3548","UBUNTU-CVE-2021-3653","USN-5062-1"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","data_read","denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel KVM","requires_auth":"low_privilege","summary":"A malicious L1 guest can escape to the host via improper validation in KVM's AMD SVM nested virtualization, enabling host code execution or data leaks.","user_interaction":"not_required","vuln_class":"privilege_escalation"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"redhat","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"linux_kernel","vendor":"linux"},{"product":"enterprise_linux","vendor":"redhat"}],"cvss":{"score":8.8,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-862","name":"Missing Authorization"}],"description":"A flaw was found in the KVM's AMD code for supporting SVM nested virtualization. The flaw occurs when processing the VMCB (virtual machine control block) provided by the L1 guest to spawn/handle a nested guest (L2). Due to improper validation of the \"int_ctl\" field, this issue could allow a malicious L1 to enable AVIC support (Advanced Virtual Interrupt Controller) for the L2 guest. As a result, the L2 guest would be allowed to read/write physical pages of the host, resulting in a crash of the entire system, leak of sensitive data or potential guest-to-host escape. This flaw affects Linux kernel versions prior to 5.14-rc7.","ecosystems":["AlmaLinux:8","Red Hat:enterprise_linux:8::baseos","Red Hat:enterprise_linux:8::crb","Red Hat:enterprise_linux:8::nfv","Red Hat:enterprise_linux:8::realtime","Rocky Linux:8"],"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":"Privilege escalation in kernel","id":"CVE-2021-3653","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","linux:linux_kernel","redhat:enterprise_linux"],"type":"privilege_escalation","year":"2021"},"n_packages":75,"n_references":5,"next":{"headline":"Open Redirect in CPython that affects users of OpenStack Nova","id":"CVE-2021-3654"},"packages":[{"ecosystem":"AlmaLinux:8","fixed":["4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-tools-libs-devel","purl":"pkg:rpm/almalinux/kernel-tools-libs-devel","source":"ALSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"bpftool","purl":"pkg:rpm/redhat/bpftool","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"bpftool-debuginfo","purl":"pkg:rpm/redhat/bpftool-debuginfo","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel","purl":"pkg:rpm/redhat/kernel","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-abi-stablelists","purl":"pkg:rpm/redhat/kernel-abi-stablelists","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-core","purl":"pkg:rpm/redhat/kernel-core","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-cross-headers","purl":"pkg:rpm/redhat/kernel-cross-headers","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-debug","purl":"pkg:rpm/redhat/kernel-debug","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-core","purl":"pkg:rpm/redhat/kernel-debug-core","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-debuginfo","purl":"pkg:rpm/redhat/kernel-debug-debuginfo","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-devel","purl":"pkg:rpm/redhat/kernel-debug-devel","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-modules","purl":"pkg:rpm/redhat/kernel-debug-modules","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-modules-extra","purl":"pkg:rpm/redhat/kernel-debug-modules-extra","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-debuginfo","purl":"pkg:rpm/redhat/kernel-debuginfo","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-debuginfo-common-aarch64","purl":"pkg:rpm/redhat/kernel-debuginfo-common-aarch64","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-debuginfo-common-ppc64le","purl":"pkg:rpm/redhat/kernel-debuginfo-common-ppc64le","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-debuginfo-common-s390x","purl":"pkg:rpm/redhat/kernel-debuginfo-common-s390x","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-debuginfo-common-x86_64","purl":"pkg:rpm/redhat/kernel-debuginfo-common-x86_64","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-devel","purl":"pkg:rpm/redhat/kernel-devel","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-doc","purl":"pkg:rpm/redhat/kernel-doc","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-modules","purl":"pkg:rpm/redhat/kernel-modules","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-modules-extra","purl":"pkg:rpm/redhat/kernel-modules-extra","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-tools","purl":"pkg:rpm/redhat/kernel-tools","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-tools-debuginfo","purl":"pkg:rpm/redhat/kernel-tools-debuginfo","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-tools-libs","purl":"pkg:rpm/redhat/kernel-tools-libs","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-zfcpdump","purl":"pkg:rpm/redhat/kernel-zfcpdump","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-zfcpdump-core","purl":"pkg:rpm/redhat/kernel-zfcpdump-core","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-zfcpdump-debuginfo","purl":"pkg:rpm/redhat/kernel-zfcpdump-debuginfo","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-zfcpdump-devel","purl":"pkg:rpm/redhat/kernel-zfcpdump-devel","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-zfcpdump-modules","purl":"pkg:rpm/redhat/kernel-zfcpdump-modules","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-zfcpdump-modules-extra","purl":"pkg:rpm/redhat/kernel-zfcpdump-modules-extra","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"perf","purl":"pkg:rpm/redhat/perf","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"perf-debuginfo","purl":"pkg:rpm/redhat/perf-debuginfo","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"python3-perf","purl":"pkg:rpm/redhat/python3-perf","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::baseos","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"python3-perf-debuginfo","purl":"pkg:rpm/redhat/python3-perf-debuginfo","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::crb","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"bpftool-debuginfo","purl":"pkg:rpm/redhat/bpftool-debuginfo","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::crb","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-debuginfo","purl":"pkg:rpm/redhat/kernel-debug-debuginfo","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::crb","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-debuginfo","purl":"pkg:rpm/redhat/kernel-debuginfo","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::crb","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-debuginfo-common-aarch64","purl":"pkg:rpm/redhat/kernel-debuginfo-common-aarch64","source":"RHSA-2021:3548"},{"ecosystem":"Red Hat:enterprise_linux:8::crb","fixed":["0:4.18.0-305.19.1.el8_4"],"introduced":["0"],"last_affected":[],"package":"kernel-debuginfo-common-ppc64le","purl":"pkg:rpm/redhat/kernel-debuginfo-common-ppc64le","source":"RHSA-2021:3548"}],"prev":{"headline":"Auth bypass in 389-ds-base","id":"CVE-2021-3652"},"products":["kernel"],"published":"2021-09-29","related":[{"cvss_score":10,"headline":"ProFTPD Improper Access Control","id":"CVE-2015-3306","kev_date_added":"2026-10-08","published":"2015-05-18"},{"cvss_score":9.9,"headline":"RoundCube Webmail Deserialization of Untrusted Data","id":"CVE-2025-49113","kev_date_added":"2026-02-20","published":"2025-06-02"},{"cvss_score":9.8,"headline":"GNU InetUtils Argument Injection","id":"CVE-2026-24061","kev_date_added":"2026-01-26","published":"2026-01-21"},{"cvss_score":9.8,"headline":"Linux Kernel Improper Check for Unusual or Exceptional Conditions","id":"CVE-2025-39682","kev_date_added":"2026-09-18","published":"2025-09-05"},{"cvss_score":9.8,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2024-9680","kev_date_added":"2024-10-15","published":"2024-10-09"},{"cvss_score":9.8,"headline":"RARLAB UnRAR Directory Traversal","id":"CVE-2022-30333","kev_date_added":"2022-08-09","published":"2022-05-09"},{"cvss_score":9.8,"headline":"Roundcube Webmail SQL Injection","id":"CVE-2021-44026","kev_date_added":"2023-06-22","published":"2021-11-19"}],"sources":[{"class":"attribution","licence":"MIT","name":"AlmaLinux","prefix":"ALSA"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"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":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-03","vendors":["n/a"]},"summary":"A malicious L1 guest can escape to the host via improper validation in KVM's AMD SVM nested virtualization, enabling host code execution or data leaks.","url":"https://insights.sbomify.com/CVE-2021-3653/"}