{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2024-42271 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2024-42271 is a high-severity use after free vulnerability in Linux kernel, published on 17 Aug 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-2024-42271 and fix it if it is affected.\n\nWhat it is: CVE-2024-42271 is a high-severity use after free vulnerability in Linux kernel, published on 17 Aug 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-2024-42271 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-2024-42271/ (Markdown: https://insights.sbomify.com/CVE-2024-42271/index.md)","id":"CVE-2024-42271","markdown":"https://insights.sbomify.com/CVE-2024-42271/index.md","name":"CVE-2024-42271","record":{"aliases":["AZL-47808","AZL-47853","BELL-CVE-2024-42271","DEBIAN-CVE-2024-42271","GHSA-gqp6-8ccj-768w","ROOT-OS-DEBIAN-11-CVE-2024-42271","UBUNTU-CVE-2024-42271"],"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 use-after-free vulnerability in the Linux kernel's IUCV socket implementation allows local attackers to cause a system crash via race conditions.","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":[{"id":"CWE-416","name":"Use After Free"}],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/iucv: fix use after free in iucv_sock_close()\n\niucv_sever_path() is called from process context and from bh context.\niucv-\u003epath is used as indicator whether somebody else is taking care of\nsevering the path (or it is already removed / never existed).\nThis needs to be done with atomic compare and swap, otherwise there is a\nsmall window where iucv_sock_close() will try to work with a path that has\nalready been severed and freed by iucv_callback_connrej() called by\niucv_tasklet_fn().\n\nExample:\n[452744.123844] Call Trace:\n[452744.123845] ([\u003c0000001e87f03880\u003e] 0x1e87f03880)\n[452744.123966]  [\u003c00000000d593001e\u003e] iucv_path_sever+0x96/0x138\n[452744.124330]  [\u003c000003ff801ddbca\u003e] iucv_sever_path+0xc2/0xd0 [af_iucv]\n[452744.124336]  [\u003c000003ff801e01b6\u003e] iucv_sock_close+0xa6/0x310 [af_iucv]\n[452744.124341]  [\u003c000003ff801e08cc\u003e] iucv_sock_release+0x3c/0xd0 [af_iucv]\n[452744.124345]  [\u003c00000000d574794e\u003e] __sock_release+0x5e/0xe8\n[452744.124815]  [\u003c00000000d5747a0c\u003e] sock_close+0x34/0x48\n[452744.124820]  [\u003c00000000d5421642\u003e] __fput+0xba/0x268\n[452744.124826]  [\u003c00000000d51b382c\u003e] task_work_run+0xbc/0xf0\n[452744.124832]  [\u003c00000000d5145710\u003e] do_notify_resume+0x88/0x90\n[452744.124841]  [\u003c00000000d5978096\u003e] system_call+0xe2/0x2c8\n[452744.125319] Last Breaking-Event-Address:\n[452744.125321]  [\u003c00000000d5930018\u003e] iucv_path_sever+0x90/0x138\n[452744.125324]\n[452744.125325] Kernel panic - not syncing: Fatal exception in interrupt\n\nNote that bh_lock_sock() is not serializing the tasklet context against\nprocess context, because the check for sock_owned_by_user() and\ncorresponding handling is missing.\n\nIdeas for a future clean-up patch:\nA) Correct usage of bh_lock_sock() in tasklet context, as described in\nRe-enqueue, if needed. This may require adding return values to the\ntasklet functions and thus changes to all users of iucv.\n\nB) Change iucv tasklet into worker and use only lock_sock() in af_iucv.","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/iucv: fix use after free in iucv_sock_close()","id":"CVE-2024-42271","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":8,"next":{"headline":"sched: act_ct: take care of padding in struct zones_ht_key","id":"CVE-2024-42272"},"packages":[],"prev":{"headline":"netfilter: iptables: Fix null-ptr-deref in iptable_nat_table_init().","id":"CVE-2024-42270"},"products":["Linux"],"published":"2024-08-17","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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-08-05","vendors":["Linux"]},"summary":"A use-after-free vulnerability in the Linux kernel's IUCV socket implementation allows local attackers to cause a system crash via race conditions.","url":"https://insights.sbomify.com/CVE-2024-42271/"}