{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2025-37797 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-37797 is a high-severity use after free vulnerability in Debian Debian Linux, published on 2 May 2025. 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-2025-37797 and fix it if it is affected.\n\nWhat it is: CVE-2025-37797 is a high-severity use after free vulnerability in Debian Debian Linux, published on 2 May 2025. 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-2025-37797 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-2025-37797/ (Markdown: https://insights.sbomify.com/CVE-2025-37797/index.md)","id":"CVE-2025-37797","markdown":"https://insights.sbomify.com/CVE-2025-37797/index.md","name":"CVE-2025-37797","record":{"aliases":["BELL-CVE-2025-37797","DEBIAN-CVE-2025-37797","GHSA-hvr4-ppmm-c7fp","ROOT-OS-DEBIAN-12-CVE-2025-37797","ROOT-OS-UBUNTU-2204-CVE-2025-37797","ROOT-OS-UBUNTU-2404-CVE-2025-37797","SUSE-SU-2025:02671-1","SUSE-SU-2025:02707-1","UBUNTU-CVE-2025-37797"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A use-after-free flaw in the Linux kernel's HFSC qdisc allows local attackers to potentially execute code or escalate privileges via race conditions.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":7.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-416","name":"Use After Free"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet_sched: hfsc: Fix a UAF vulnerability in class handling\n\nThis patch fixes a Use-After-Free vulnerability in the HFSC qdisc class\nhandling. The issue occurs due to a time-of-check/time-of-use condition\nin hfsc_change_class() when working with certain child qdiscs like netem\nor codel.\n\nThe vulnerability works as follows:\n1. hfsc_change_class() checks if a class has packets (q.qlen != 0)\n2. It then calls qdisc_peek_len(), which for certain qdiscs (e.g.,\n   codel, netem) might drop packets and empty the queue\n3. The code continues assuming the queue is still non-empty, adding\n   the class to vttree\n4. This breaks HFSC scheduler assumptions that only non-empty classes\n   are in vttree\n5. Later, when the class is destroyed, this can lead to a Use-After-Free\n\nThe fix adds a second queue length check after qdisc_peek_len() to verify\nthe queue wasn't emptied.","ecosystems":["SUSE:Linux Enterprise Live Patching 15 SP3","SUSE:Linux Enterprise Live Patching 15 SP5"],"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":"net_sched: hfsc: Fix a UAF vulnerability in class handling","id":"CVE-2025-37797","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","linux:linux_kernel"],"type":"use_after_free","year":"2025"},"n_packages":2,"n_references":8,"next":{"headline":"codel: remove sch-\u003eq.qlen check before qdisc_tree_reduce_backlog()","id":"CVE-2025-37798"},"packages":[{"ecosystem":"SUSE:Linux Enterprise Live Patching 15 SP3","fixed":["2-150300.2.1"],"introduced":["0"],"last_affected":[],"package":"kernel-livepatch-SLE15-SP3_Update_59","purl":"pkg:rpm/suse/kernel-livepatch-SLE15-SP3_Update_59\u0026distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP3","source":"SUSE-SU-2025:02707-1"},{"ecosystem":"SUSE:Linux Enterprise Live Patching 15 SP5","fixed":["2-150500.2.1"],"introduced":["0"],"last_affected":[],"package":"kernel-livepatch-SLE15-SP5_Update_28","purl":"pkg:rpm/suse/kernel-livepatch-SLE15-SP5_Update_28\u0026distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP5","source":"SUSE-SU-2025:02671-1"}],"prev":{"headline":"wifi: at76c50x: fix use after free access in at76_disconnect","id":"CVE-2025-37796"},"products":["Linux"],"published":"2025-05-02","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":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"SUSE"},{"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":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-08-05","vendors":["Linux"]},"summary":"A use-after-free flaw in the Linux kernel's HFSC qdisc allows local attackers to potentially execute code or escalate privileges via race conditions.","url":"https://insights.sbomify.com/CVE-2025-37797/"}