{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-31399 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-31399 is a high-severity use after free vulnerability in Linux kernel, published on 3 Apr 2026. 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-2026-31399 and fix it if it is affected.\n\nWhat it is: CVE-2026-31399 is a high-severity use after free vulnerability in Linux kernel, published on 3 Apr 2026. 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-2026-31399 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-2026-31399/ (Markdown: https://insights.sbomify.com/CVE-2026-31399/index.md)","id":"CVE-2026-31399","markdown":"https://insights.sbomify.com/CVE-2026-31399/index.md","name":"CVE-2026-31399","record":{"aliases":["BELL-CVE-2026-31399","DEBIAN-CVE-2026-31399","GHSA-j3fg-h3r6-7945","ROOT-OS-DEBIAN-11-CVE-2026-31399","ROOT-OS-DEBIAN-12-CVE-2026-31399","ROOT-OS-DEBIAN-13-CVE-2026-31399","ROOT-OS-UBUNTU-2204-CVE-2026-31399","ROOT-OS-UBUNTU-2404-CVE-2026-31399","UBUNTU-CVE-2026-31399"],"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 vulnerability in the Linux kernel's NVDIMM bus initialization allows attackers to potentially execute code or escalate privileges.","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":7.8,"severity":"high","source":"nvd","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\nnvdimm/bus: Fix potential use after free in asynchronous initialization\n\nDingisoul with KASAN reports a use after free if device_add() fails in\nnd_async_device_register().\n\nCommit b6eae0f61db2 (\"libnvdimm: Hold reference on parent while\nscheduling async init\") correctly added a reference on the parent device\nto be held until asynchronous initialization was complete.  However, if\ndevice_add() results in an allocation failure the ref count of the\ndevice drops to 0 prior to the parent pointer being accessed.  Thus\nresulting in use after free.\n\nThe bug bot AI correctly identified the fix.  Save a reference to the\nparent pointer to be used to drop the parent reference regardless of the\noutcome of device_add().","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":"nvdimm/bus: Fix potential use after free in asynchronous initialization","id":"CVE-2026-31399","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"use_after_free","year":"2026"},"n_packages":0,"n_references":8,"next":{"headline":"sunrpc: fix cache_request leak in cache_release","id":"CVE-2026-31400"},"packages":[],"prev":{"headline":"mm/rmap: fix incorrect pte restoration for lazyfree folios","id":"CVE-2026-31398"},"products":["Linux"],"published":"2026-04-03","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)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-05-23","vendors":["Linux"]},"summary":"A use-after-free vulnerability in the Linux kernel's NVDIMM bus initialization allows attackers to potentially execute code or escalate privileges.","url":"https://insights.sbomify.com/CVE-2026-31399/"}