{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-43314 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-43314 is a medium-severity denial of service vulnerability in Linux kernel, published on 8 May 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-2026-43314 and fix it if it is affected.\n\nWhat it is: CVE-2026-43314 is a medium-severity denial of service vulnerability in Linux kernel, published on 8 May 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-2026-43314 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-2026-43314/ (Markdown: https://insights.sbomify.com/CVE-2026-43314/index.md)","id":"CVE-2026-43314","markdown":"https://insights.sbomify.com/CVE-2026-43314/index.md","name":"CVE-2026-43314","record":{"aliases":["BELL-CVE-2026-43314","DEBIAN-CVE-2026-43314","GHSA-r88m-3gh4-8vp3","ROOT-OS-DEBIAN-11-CVE-2026-43314","ROOT-OS-UBUNTU-2204-CVE-2026-43314","ROOT-OS-UBUNTU-2404-CVE-2026-43314","UBUNTU-CVE-2026-43314"],"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 flaw in the Linux kernel device-mapper driver causes task hangs and resource leaks when I/O timeout failures are injected, leading to denial of service.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"Linux","cpe":[{"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-772","name":"Missing Release of Resource after Effective Lifetime"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\ndm: remove fake timeout to avoid leak request\n\nSince commit 15f73f5b3e59 (\"blk-mq: move failure injection out of\nblk_mq_complete_request\"), drivers are responsible for calling\nblk_should_fake_timeout() at appropriate code paths and opportunities.\n\nHowever, the dm driver does not implement its own timeout handler and\nrelies on the timeout handling of its slave devices.\n\nIf an io-timeout-fail error is injected to a dm device, the request\nwill be leaked and never completed, causing tasks to hang indefinitely.\n\nReproduce:\n1. prepare dm which has iscsi slave device\n2. inject io-timeout-fail to dm\n   echo 1 \u003e/sys/class/block/dm-0/io-timeout-fail\n   echo 100 \u003e/sys/kernel/debug/fail_io_timeout/probability\n   echo 10 \u003e/sys/kernel/debug/fail_io_timeout/times\n3. read/write dm\n4. iscsiadm -m node -u\n\nResult: hang task like below\n[  862.243768] INFO: task kworker/u514:2:151 blocked for more than 122 seconds.\n[  862.244133]       Tainted: G            E       6.19.0-rc1+ #51\n[  862.244337] \"echo 0 \u003e /proc/sys/kernel/hung_task_timeout_secs\" disables this message.\n[  862.244718] task:kworker/u514:2  state:D stack:0     pid:151   tgid:151   ppid:2      task_flags:0x4288060 flags:0x00080000\n[  862.245024] Workqueue: iscsi_ctrl_3:1 __iscsi_unbind_session [scsi_transport_iscsi]\n[  862.245264] Call Trace:\n[  862.245587]  \u003cTASK\u003e\n[  862.245814]  __schedule+0x810/0x15c0\n[  862.246557]  schedule+0x69/0x180\n[  862.246760]  blk_mq_freeze_queue_wait+0xde/0x120\n[  862.247688]  elevator_change+0x16d/0x460\n[  862.247893]  elevator_set_none+0x87/0xf0\n[  862.248798]  blk_unregister_queue+0x12e/0x2a0\n[  862.248995]  __del_gendisk+0x231/0x7e0\n[  862.250143]  del_gendisk+0x12f/0x1d0\n[  862.250339]  sd_remove+0x85/0x130 [sd_mod]\n[  862.250650]  device_release_driver_internal+0x36d/0x530\n[  862.250849]  bus_remove_device+0x1dd/0x3f0\n[  862.251042]  device_del+0x38a/0x930\n[  862.252095]  __scsi_remove_device+0x293/0x360\n[  862.252291]  scsi_remove_target+0x486/0x760\n[  862.252654]  __iscsi_unbind_session+0x18a/0x3e0 [scsi_transport_iscsi]\n[  862.252886]  process_one_work+0x633/0xe50\n[  862.253101]  worker_thread+0x6df/0xf10\n[  862.253647]  kthread+0x36d/0x720\n[  862.254533]  ret_from_fork+0x2a6/0x470\n[  862.255852]  ret_from_fork_asm+0x1a/0x30\n[  862.256037]  \u003c/TASK\u003e\n\nRemove the blk_should_fake_timeout() check from dm, as dm has no\nnative timeout handling and should not attempt to fake timeouts.","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":"dm: remove fake timeout to avoid leak request","id":"CVE-2026-43314","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"denial_of_service","year":"2026"},"n_packages":0,"n_references":8,"next":{"headline":"KVM: nSVM: Remove a user-triggerable WARN on nested_svm_load_cr3() succeeding","id":"CVE-2026-43315"},"packages":[],"prev":{"headline":"ACPI: processor: Fix NULL-pointer dereference in acpi_processor_errata_piix4()","id":"CVE-2026-43313"},"products":["Linux"],"published":"2026-05-08","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":"2026-05-11","vendors":["Linux"]},"summary":"A flaw in the Linux kernel device-mapper driver causes task hangs and resource leaks when I/O timeout failures are injected, leading to denial of service.","url":"https://insights.sbomify.com/CVE-2026-43314/"}