{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2025-39683 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-39683 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 5 Sep 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-2025-39683 and fix it if it is affected.\n\nWhat it is: CVE-2025-39683 is a high-severity memory corruption vulnerability in Debian Debian Linux, published on 5 Sep 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-2025-39683 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-2025-39683/ (Markdown: https://insights.sbomify.com/CVE-2025-39683/index.md)","id":"CVE-2025-39683","markdown":"https://insights.sbomify.com/CVE-2025-39683/index.md","name":"CVE-2025-39683","record":{"aliases":["AZL-67037","AZL-73695","BELL-CVE-2025-39683","DEBIAN-CVE-2025-39683","GHSA-jvqc-385v-69q8","ROOT-OS-DEBIAN-11-CVE-2025-39683","ROOT-OS-DEBIAN-12-CVE-2025-39683","ROOT-OS-DEBIAN-13-CVE-2025-39683","ROOT-OS-UBUNTU-2204-CVE-2025-39683","ROOT-OS-UBUNTU-2404-CVE-2025-39683","UBUNTU-CVE-2025-39683"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service"],"network_reachable":"adjacent_or_local","non_default_config":false,"product_category":"Linux kernel","requires_auth":"low_privilege","summary":"A local attacker can trigger a slab-out-of-bounds read in the Linux kernel tracing subsystem by writing an overly long string to set_ftrace_filter, causing a system crash.","user_interaction":"not_required","vuln_class":"memory_corruption"},"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-125","name":"Out-of-bounds Read"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntracing: Limit access to parser-\u003ebuffer when trace_get_user failed\n\nWhen the length of the string written to set_ftrace_filter exceeds\nFTRACE_BUFF_MAX, the following KASAN alarm will be triggered:\n\nBUG: KASAN: slab-out-of-bounds in strsep+0x18c/0x1b0\nRead of size 1 at addr ffff0000d00bd5ba by task ash/165\n\nCPU: 1 UID: 0 PID: 165 Comm: ash Not tainted 6.16.0-g6bcdbd62bd56-dirty\nHardware name: linux,dummy-virt (DT)\nCall trace:\n show_stack+0x34/0x50 (C)\n dump_stack_lvl+0xa0/0x158\n print_address_description.constprop.0+0x88/0x398\n print_report+0xb0/0x280\n kasan_report+0xa4/0xf0\n __asan_report_load1_noabort+0x20/0x30\n strsep+0x18c/0x1b0\n ftrace_process_regex.isra.0+0x100/0x2d8\n ftrace_regex_release+0x484/0x618\n __fput+0x364/0xa58\n ____fput+0x28/0x40\n task_work_run+0x154/0x278\n do_notify_resume+0x1f0/0x220\n el0_svc+0xec/0xf0\n el0t_64_sync_handler+0xa0/0xe8\n el0t_64_sync+0x1ac/0x1b0\n\nThe reason is that trace_get_user will fail when processing a string\nlonger than FTRACE_BUFF_MAX, but not set the end of parser-\u003ebuffer to 0.\nThen an OOB access will be triggered in ftrace_regex_release-\u003e\nftrace_process_regex-\u003estrsep-\u003estrpbrk. We can solve this problem by\nlimiting access to parser-\u003ebuffer when trace_get_user failed.","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":"tracing: Limit access to parser-\u003ebuffer when trace_get_user failed","id":"CVE-2025-39683","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","linux:linux_kernel"],"type":"memory_corruption","year":"2025"},"n_packages":0,"n_references":7,"next":{"headline":"comedi: Fix use of uninitialized memory in do_insn_ioctl() and do_insnlist_ioctl()","id":"CVE-2025-39684"},"packages":[],"prev":{"headline":"Linux Kernel Improper Check for Unusual or Exceptional Conditions","id":"CVE-2025-39682"},"products":["Linux"],"published":"2025-09-05","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":"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":"2026-10-15","vendors":["Linux"]},"summary":"A local attacker can trigger a slab-out-of-bounds read in the Linux kernel tracing subsystem by writing an overly long string to set_ftrace_filter, causing a system crash.","url":"https://insights.sbomify.com/CVE-2025-39683/"}