{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2024-36009 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2024-36009 is a high-severity use after free vulnerability in Linux kernel, published on 20 May 2024. 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-2024-36009 and fix it if it is affected.\n\nWhat it is: CVE-2024-36009 is a high-severity use after free vulnerability in Linux kernel, published on 20 May 2024. 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-2024-36009 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-2024-36009/ (Markdown: https://insights.sbomify.com/CVE-2024-36009/index.md)","id":"CVE-2024-36009","markdown":"https://insights.sbomify.com/CVE-2024-36009/index.md","name":"CVE-2024-36009","record":{"aliases":["AZL-42121","AZL-67706","BELL-CVE-2024-36009","DEBIAN-CVE-2024-36009","GHSA-x92x-33cw-2vqw","ROOT-OS-DEBIAN-11-CVE-2024-36009","ROOT-OS-UBUNTU-2204-CVE-2024-36009","UBUNTU-CVE-2024-36009"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel AX.25","requires_auth":"low_privilege","summary":"A use-after-free vulnerability in the Linux kernel AX.25 subsystem allows local attackers to cause a system crash via improper reference counting during device detachment.","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":"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":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nax25: Fix netdev refcount issue\n\nThe dev_tracker is added to ax25_cb in ax25_bind(). When the\nax25 device is detaching, the dev_tracker of ax25_cb should be\ndeallocated in ax25_kill_by_device() instead of the dev_tracker\nof ax25_dev. The log reported by ref_tracker is shown below:\n\n[   80.884935] ref_tracker: reference already released.\n[   80.885150] ref_tracker: allocated in:\n[   80.885349]  ax25_dev_device_up+0x105/0x540\n[   80.885730]  ax25_device_event+0xa4/0x420\n[   80.885730]  notifier_call_chain+0xc9/0x1e0\n[   80.885730]  __dev_notify_flags+0x138/0x280\n[   80.885730]  dev_change_flags+0xd7/0x180\n[   80.885730]  dev_ifsioc+0x6a9/0xa30\n[   80.885730]  dev_ioctl+0x4d8/0xd90\n[   80.885730]  sock_do_ioctl+0x1c2/0x2d0\n[   80.885730]  sock_ioctl+0x38b/0x4f0\n[   80.885730]  __se_sys_ioctl+0xad/0xf0\n[   80.885730]  do_syscall_64+0xc4/0x1b0\n[   80.885730]  entry_SYSCALL_64_after_hwframe+0x67/0x6f\n[   80.885730] ref_tracker: freed in:\n[   80.885730]  ax25_device_event+0x272/0x420\n[   80.885730]  notifier_call_chain+0xc9/0x1e0\n[   80.885730]  dev_close_many+0x272/0x370\n[   80.885730]  unregister_netdevice_many_notify+0x3b5/0x1180\n[   80.885730]  unregister_netdev+0xcf/0x120\n[   80.885730]  sixpack_close+0x11f/0x1b0\n[   80.885730]  tty_ldisc_kill+0xcb/0x190\n[   80.885730]  tty_ldisc_hangup+0x338/0x3d0\n[   80.885730]  __tty_hangup+0x504/0x740\n[   80.885730]  tty_release+0x46e/0xd80\n[   80.885730]  __fput+0x37f/0x770\n[   80.885730]  __x64_sys_close+0x7b/0xb0\n[   80.885730]  do_syscall_64+0xc4/0x1b0\n[   80.885730]  entry_SYSCALL_64_after_hwframe+0x67/0x6f\n[   80.893739] ------------[ cut here ]------------\n[   80.894030] WARNING: CPU: 2 PID: 140 at lib/ref_tracker.c:255 ref_tracker_free+0x47b/0x6b0\n[   80.894297] Modules linked in:\n[   80.894929] CPU: 2 PID: 140 Comm: ax25_conn_rel_6 Not tainted 6.9.0-rc4-g8cd26fd90c1a #11\n[   80.895190] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qem4\n[   80.895514] RIP: 0010:ref_tracker_free+0x47b/0x6b0\n[   80.895808] Code: 83 c5 18 4c 89 eb 48 c1 eb 03 8a 04 13 84 c0 0f 85 df 01 00 00 41 83 7d 00 00 75 4b 4c 89 ff 9\n[   80.896171] RSP: 0018:ffff888009edf8c0 EFLAGS: 00000286\n[   80.896339] RAX: 1ffff1100141ac00 RBX: 1ffff1100149463b RCX: dffffc0000000000\n[   80.896502] RDX: 0000000000000001 RSI: 0000000000000246 RDI: ffff88800a0d6518\n[   80.896925] RBP: ffff888009edf9b0 R08: ffff88806d3288d3 R09: 1ffff1100da6511a\n[   80.897212] R10: dffffc0000000000 R11: ffffed100da6511b R12: ffff88800a4a31d4\n[   80.897859] R13: ffff88800a4a31d8 R14: dffffc0000000000 R15: ffff88800a0d6518\n[   80.898279] FS:  00007fd88b7fe700(0000) GS:ffff88806d300000(0000) knlGS:0000000000000000\n[   80.899436] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[   80.900181] CR2: 00007fd88c001d48 CR3: 000000000993e000 CR4: 00000000000006f0\n...\n[   80.935774] ref_tracker: sp%d@000000000bb9df3d has 1/1 users at\n[   80.935774]      ax25_bind+0x424/0x4e0\n[   80.935774]      __sys_bind+0x1d9/0x270\n[   80.935774]      __x64_sys_bind+0x75/0x80\n[   80.935774]      do_syscall_64+0xc4/0x1b0\n[   80.935774]      entry_SYSCALL_64_after_hwframe+0x67/0x6f\n\nChange ax25_dev-\u003edev_tracker to the dev_tracker of ax25_cb\nin order to mitigate the bug.","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":"ax25: Fix netdev refcount issue","id":"CVE-2024-36009","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"use_after_free","year":"2024"},"n_packages":0,"n_references":4,"next":{"headline":"igb: Fix string truncation warnings in igb_set_fw_version","id":"CVE-2024-36010"},"packages":[],"prev":{"headline":"ipv4: check for NULL idev in ip_route_use_hint()","id":"CVE-2024-36008"},"products":["Linux"],"published":"2024-05-20","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":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-05","vendors":["Linux"]},"summary":"A use-after-free vulnerability in the Linux kernel AX.25 subsystem allows local attackers to cause a system crash via improper reference counting during device detachment.","url":"https://insights.sbomify.com/CVE-2024-36009/"}