{"answers":{"affected":"","exploited":"There is no known exploitation of CVE-2025-40083 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-40083 is a vulnerability in Linux, published on 29 Oct 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-2025-40083 and fix it if it is affected.\n\nWhat it is: CVE-2025-40083 is a vulnerability in Linux, published on 29 Oct 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-2025-40083 in the wild and no public exploit code.\n\nAffected product: 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-2025-40083/ (Markdown: https://insights.sbomify.com/CVE-2025-40083/index.md)","id":"CVE-2025-40083","markdown":"https://insights.sbomify.com/CVE-2025-40083/index.md","name":"CVE-2025-40083","record":{"aliases":["AZL-69027","BELL-CVE-2025-40083","DEBIAN-CVE-2025-40083","GHSA-wf68-85vc-c49w","ROOT-OS-DEBIAN-11-CVE-2025-40083","ROOT-OS-DEBIAN-12-CVE-2025-40083","ROOT-OS-DEBIAN-13-CVE-2025-40083","ROOT-OS-UBUNTU-2204-CVE-2025-40083","ROOT-OS-UBUNTU-2404-CVE-2025-40083","UBUNTU-CVE-2025-40083"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A null pointer dereference in the Linux kernel's QFQ scheduler can cause a system crash, requiring local access and specific network scheduling configuration.","user_interaction":"not_required","vuln_class":"null_dereference"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: sch_qfq: Fix null-deref in agg_dequeue\n\nTo prevent a potential crash in agg_dequeue (net/sched/sch_qfq.c)\nwhen cl-\u003eqdisc-\u003eops-\u003epeek(cl-\u003eqdisc) returns NULL, we check the return\nvalue before using it, similar to the existing approach in sch_hfsc.c.\n\nTo avoid code duplication, the following changes are made:\n\n1. Changed qdisc_warn_nonwc(include/net/pkt_sched.h) into a static\ninline function.\n\n2. Moved qdisc_peek_len from net/sched/sch_hfsc.c to\ninclude/net/pkt_sched.h so that sch_qfq can reuse it.\n\n3. Applied qdisc_peek_len in agg_dequeue to avoid crashing.","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":"net/sched: sch_qfq: Fix null-deref in agg_dequeue","id":"CVE-2025-40083","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"null_dereference","year":"2025"},"n_packages":0,"n_references":7,"next":{"headline":"ksmbd: transport_ipc: validate payload size before reading handle","id":"CVE-2025-40084"},"packages":[],"prev":{"headline":"hfsplus: fix slab-out-of-bounds read in hfsplus_uni2asc()","id":"CVE-2025-40082"},"products":["Linux"],"published":"2025-10-29","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-16","vendors":["Linux"]},"summary":"A null pointer dereference in the Linux kernel's QFQ scheduler can cause a system crash, requiring local access and specific network scheduling configuration.","url":"https://insights.sbomify.com/CVE-2025-40083/"}