{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2025-37899 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-37899 is a high-severity use after free vulnerability in Linux kernel, published on 20 May 2025. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2025-37899 and fix it if it is affected.\n\nWhat it is: CVE-2025-37899 is a high-severity use after free vulnerability in Linux kernel, published on 20 May 2025. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2025-37899 in the wild and no public exploit code.\n\nAffected product: Linux kernel. 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-2025-37899/ (Markdown: https://insights.sbomify.com/CVE-2025-37899/index.md)","id":"CVE-2025-37899","markdown":"https://insights.sbomify.com/CVE-2025-37899/index.md","name":"CVE-2025-37899","record":{"aliases":["BELL-CVE-2025-37899","DEBIAN-CVE-2025-37899","GHSA-3rcg-456g-86p6","ROOT-OS-DEBIAN-12-CVE-2025-37899","ROOT-OS-UBUNTU-2204-CVE-2025-37899","ROOT-OS-UBUNTU-2404-CVE-2025-37899","UBUNTU-CVE-2025-37899"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["code_execution","privilege_escalation"],"network_reachable":"yes","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A use-after-free in the Linux kernel ksmbd module allows attackers to potentially execute code or escalate privileges via session logoff.","user_interaction":"not_required","vuln_class":"use_after_free"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":8.8,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/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\nksmbd: fix use-after-free in session logoff\n\nThe sess-\u003euser object can currently be in use by another thread, for\nexample if another connection has sent a session setup request to\nbind to the session being free'd. The handler for that connection could\nbe in the smb2_sess_setup function which makes use of sess-\u003euser.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":"2025-05-22","github_poc":3,"max_poc_stars":354,"metasploit":0,"nuclei":0,"refs":[{"date":"2025-05-22T10:36:18Z","kind":"github_poc","ref":"https://github.com/SeanHeelan/o3_finds_cve-2025-37899","stars":354,"title":"Artefacts for blog post on finding CVE-2025-37899 with o3"},{"date":"2025-06-09T09:01:57Z","kind":"github_poc","ref":"https://github.com/vett3x/SMB-LINUX-CVE-2025-37899","stars":0,"title":null},{"date":"2025-09-11T16:24:11Z","kind":"github_poc","ref":"https://github.com/ccss17/o3_finds_cve-2025-37899","stars":0,"title":"Artefacts for blog post on finding CVE-2025-37899 with o3"}],"tier":"poc_unverified"},"has_fix":true,"headline":"ksmbd: fix use-after-free in session logoff","id":"CVE-2025-37899","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"use_after_free","year":"2025"},"n_packages":0,"n_references":5,"next":{"headline":"iommu: Fix two issues in iommu_copy_struct_from_user()","id":"CVE-2025-37900"},"packages":[],"prev":{"headline":"powerpc64/ftrace: fix module loading without patchable function entries","id":"CVE-2025-37898"},"products":["Linux"],"published":"2025-05-20","related":[{"cvss_score":8.8,"headline":"Linux Kernel Out-of-Bounds Write","id":"CVE-2026-53266","kev_date_added":"2026-09-18","published":"2026-06-25"},{"cvss_score":8.8,"headline":"Linux Kernel Improper Input Validation","id":"CVE-2013-6282","kev_date_added":"2022-09-15","published":"2013-11-19"},{"cvss_score":8.4,"headline":"Linux Kernel Heap-Based Buffer Overflow","id":"CVE-2022-0185","kev_date_added":"2024-08-21","published":"2022-02-11"},{"cvss_score":8.4,"headline":"Linux Kernel Privilege Escalation","id":"CVE-2013-2094","kev_date_added":"2022-09-15","published":"2013-05-14"},{"cvss_score":7.8,"headline":"Linux Kernel Unspecified","id":"CVE-2026-53362","kev_date_added":"2026-08-27","published":"2026-07-04"},{"cvss_score":7.8,"headline":"Linux Kernel Missing Initialization of a Variable","id":"CVE-2026-46300","kev_date_added":"2026-10-28","published":"2026-05-23"},{"cvss_score":7.8,"headline":"Linux Kernel Race Condition","id":"CVE-2025-39964","kev_date_added":"2026-09-18","published":"2025-10-13"}],"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)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-08-05","vendors":["Linux"]},"summary":"A use-after-free in the Linux kernel ksmbd module allows attackers to potentially execute code or escalate privileges via session logoff.","url":"https://insights.sbomify.com/CVE-2025-37899/"}