{"answers":{"affected":"It affects 2 products.","exploited":"There is no known exploitation of CVE-2025-39843 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2025-39843 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 19 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-2025-39843 and fix it if it is affected.\n\nWhat it is: CVE-2025-39843 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 19 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-2025-39843 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-2025-39843/ (Markdown: https://insights.sbomify.com/CVE-2025-39843/index.md)","id":"CVE-2025-39843","markdown":"https://insights.sbomify.com/CVE-2025-39843/index.md","name":"CVE-2025-39843","record":{"aliases":["ALSA-2025:21926","BELL-CVE-2025-39843","DEBIAN-CVE-2025-39843","GHSA-fwr4-vx34-qhjp","RHSA-2025:21926","RLSA-2025:21926","ROOT-OS-DEBIAN-12-CVE-2025-39843","ROOT-OS-DEBIAN-13-CVE-2025-39843","ROOT-OS-UBUNTU-2404-CVE-2025-39843","UBUNTU-CVE-2025-39843"],"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 lock recursion deadlock in the Linux kernel SLUB allocator can cause a system crash when debug objects are enabled.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"linux_kernel","vendor":"linux"}],"cvss":{"score":5.5,"severity":"medium","source":"nvd","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[{"id":"CWE-667","name":"Improper Locking"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nmm: slub: avoid wake up kswapd in set_track_prepare\n\nset_track_prepare() can incur lock recursion.\nThe issue is that it is called from hrtimer_start_range_ns\nholding the per_cpu(hrtimer_bases)[n].lock, but when enabled\nCONFIG_DEBUG_OBJECTS_TIMERS, may wake up kswapd in set_track_prepare,\nand try to hold the per_cpu(hrtimer_bases)[n].lock.\n\nAvoid deadlock caused by implicitly waking up kswapd by passing in\nallocation flags, which do not contain __GFP_KSWAPD_RECLAIM in the\ndebug_objects_fill_pool() case. Inside stack depot they are processed by\ngfp_nested_mask().\nSince ___slab_alloc() has preemption disabled, we mask out\n__GFP_DIRECT_RECLAIM from the flags there.\n\nThe oops looks something like:\n\nBUG: spinlock recursion on CPU#3, swapper/3/0\n lock: 0xffffff8a4bf29c80, .magic: dead4ead, .owner: swapper/3/0, .owner_cpu: 3\nHardware name: Qualcomm Technologies, Inc. Popsicle based on SM8850 (DT)\nCall trace:\nspin_bug+0x0\n_raw_spin_lock_irqsave+0x80\nhrtimer_try_to_cancel+0x94\ntask_contending+0x10c\nenqueue_dl_entity+0x2a4\ndl_server_start+0x74\nenqueue_task_fair+0x568\nenqueue_task+0xac\ndo_activate_task+0x14c\nttwu_do_activate+0xcc\ntry_to_wake_up+0x6c8\ndefault_wake_function+0x20\nautoremove_wake_function+0x1c\n__wake_up+0xac\nwakeup_kswapd+0x19c\nwake_all_kswapds+0x78\n__alloc_pages_slowpath+0x1ac\n__alloc_pages_noprof+0x298\nstack_depot_save_flags+0x6b0\nstack_depot_save+0x14\nset_track_prepare+0x5c\n___slab_alloc+0xccc\n__kmalloc_cache_noprof+0x470\n__set_page_owner+0x2bc\npost_alloc_hook[jt]+0x1b8\nprep_new_page+0x28\nget_page_from_freelist+0x1edc\n__alloc_pages_noprof+0x13c\nalloc_slab_page+0x244\nallocate_slab+0x7c\n___slab_alloc+0x8e8\nkmem_cache_alloc_noprof+0x450\ndebug_objects_fill_pool+0x22c\ndebug_object_activate+0x40\nenqueue_hrtimer[jt]+0xdc\nhrtimer_start_range_ns+0x5f8\n...","ecosystems":["AlmaLinux:9","Red Hat:enterprise_linux:9::appstream","Red Hat:enterprise_linux:9::baseos","Red Hat:enterprise_linux:9::crb","Red Hat:enterprise_linux:9::nfv","Red Hat:enterprise_linux:9::realtime","Rocky Linux:9"],"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":"mm: slub: avoid wake up kswapd in set_track_prepare","id":"CVE-2025-39843","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"debian:debian_linux","products":["debian:debian_linux","linux:linux_kernel"],"type":"denial_of_service","year":"2025"},"n_packages":184,"n_references":5,"next":{"headline":"mm: move page table sync declarations to linux/pgtable.h","id":"CVE-2025-39844"},"packages":[{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel","purl":"pkg:rpm/almalinux/kernel","source":"ALSA-2025:21926"},{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-64k","purl":"pkg:rpm/almalinux/kernel-64k","source":"ALSA-2025:21926"},{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-core","purl":"pkg:rpm/almalinux/kernel-64k-core","source":"ALSA-2025:21926"},{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug","purl":"pkg:rpm/almalinux/kernel-64k-debug","source":"ALSA-2025:21926"},{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-core","purl":"pkg:rpm/almalinux/kernel-64k-debug-core","source":"ALSA-2025:21926"},{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-devel","purl":"pkg:rpm/almalinux/kernel-64k-debug-devel","source":"ALSA-2025:21926"},{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-devel-matched","purl":"pkg:rpm/almalinux/kernel-64k-debug-devel-matched","source":"ALSA-2025:21926"},{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-modules","purl":"pkg:rpm/almalinux/kernel-64k-debug-modules","source":"ALSA-2025:21926"},{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-modules-extra","purl":"pkg:rpm/almalinux/kernel-64k-debug-modules-extra","source":"ALSA-2025:21926"},{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-devel","purl":"pkg:rpm/almalinux/kernel-64k-devel","source":"ALSA-2025:21926"},{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-devel-matched","purl":"pkg:rpm/almalinux/kernel-64k-devel-matched","source":"ALSA-2025:21926"},{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-modules-extra","purl":"pkg:rpm/almalinux/kernel-64k-modules-extra","source":"ALSA-2025:21926"},{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-abi-stablelists","purl":"pkg:rpm/almalinux/kernel-abi-stablelists","source":"ALSA-2025:21926"},{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-devel","purl":"pkg:rpm/almalinux/kernel-debug-devel","source":"ALSA-2025:21926"},{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-devel-matched","purl":"pkg:rpm/almalinux/kernel-debug-devel-matched","source":"ALSA-2025:21926"},{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-devel","purl":"pkg:rpm/almalinux/kernel-devel","source":"ALSA-2025:21926"},{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-devel-matched","purl":"pkg:rpm/almalinux/kernel-devel-matched","source":"ALSA-2025:21926"},{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-doc","purl":"pkg:rpm/almalinux/kernel-doc","source":"ALSA-2025:21926"},{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-headers","purl":"pkg:rpm/almalinux/kernel-headers","source":"ALSA-2025:21926"},{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-zfcpdump-devel","purl":"pkg:rpm/almalinux/kernel-zfcpdump-devel","source":"ALSA-2025:21926"},{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-zfcpdump-devel-matched","purl":"pkg:rpm/almalinux/kernel-zfcpdump-devel-matched","source":"ALSA-2025:21926"},{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"perf","purl":"pkg:rpm/almalinux/perf","source":"ALSA-2025:21926"},{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"python3-perf","purl":"pkg:rpm/almalinux/python3-perf","source":"ALSA-2025:21926"},{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"rtla","purl":"pkg:rpm/almalinux/rtla","source":"ALSA-2025:21926"},{"ecosystem":"AlmaLinux:9","fixed":["5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"rv","purl":"pkg:rpm/almalinux/rv","source":"ALSA-2025:21926"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-debuginfo","purl":"pkg:rpm/redhat/kernel-64k-debug-debuginfo","source":"RHSA-2025:21926"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-devel","purl":"pkg:rpm/redhat/kernel-64k-debug-devel","source":"RHSA-2025:21926"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debug-devel-matched","purl":"pkg:rpm/redhat/kernel-64k-debug-devel-matched","source":"RHSA-2025:21926"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-debuginfo","purl":"pkg:rpm/redhat/kernel-64k-debuginfo","source":"RHSA-2025:21926"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-devel","purl":"pkg:rpm/redhat/kernel-64k-devel","source":"RHSA-2025:21926"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-64k-devel-matched","purl":"pkg:rpm/redhat/kernel-64k-devel-matched","source":"RHSA-2025:21926"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-debuginfo","purl":"pkg:rpm/redhat/kernel-debug-debuginfo","source":"RHSA-2025:21926"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-devel","purl":"pkg:rpm/redhat/kernel-debug-devel","source":"RHSA-2025:21926"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-debug-devel-matched","purl":"pkg:rpm/redhat/kernel-debug-devel-matched","source":"RHSA-2025:21926"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-debuginfo","purl":"pkg:rpm/redhat/kernel-debuginfo","source":"RHSA-2025:21926"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-debuginfo-common-aarch64","purl":"pkg:rpm/redhat/kernel-debuginfo-common-aarch64","source":"RHSA-2025:21926"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-debuginfo-common-ppc64le","purl":"pkg:rpm/redhat/kernel-debuginfo-common-ppc64le","source":"RHSA-2025:21926"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-debuginfo-common-s390x","purl":"pkg:rpm/redhat/kernel-debuginfo-common-s390x","source":"RHSA-2025:21926"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-debuginfo-common-x86_64","purl":"pkg:rpm/redhat/kernel-debuginfo-common-x86_64","source":"RHSA-2025:21926"},{"ecosystem":"Red Hat:enterprise_linux:9::appstream","fixed":["0:5.14.0-611.9.1.el9_7"],"introduced":["0"],"last_affected":[],"package":"kernel-devel","purl":"pkg:rpm/redhat/kernel-devel","source":"RHSA-2025:21926"}],"prev":{"headline":"ocfs2: prevent release journal inode after journal shutdown","id":"CVE-2025-39842"},"products":["Linux"],"published":"2025-09-19","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":"MIT","name":"AlmaLinux","prefix":"ALSA"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"Red Hat","prefix":"RHSA"},{"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":"2026-05-12","vendors":["Linux"]},"summary":"A lock recursion deadlock in the Linux kernel SLUB allocator can cause a system crash when debug objects are enabled.","url":"https://insights.sbomify.com/CVE-2025-39843/"}