{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-23224 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-23224 is a high-severity use after free vulnerability in Linux kernel, published on 18 Feb 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-2026-23224 and fix it if it is affected.\n\nWhat it is: CVE-2026-23224 is a high-severity use after free vulnerability in Linux kernel, published on 18 Feb 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-2026-23224 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-2026-23224/ (Markdown: https://insights.sbomify.com/CVE-2026-23224/index.md)","id":"CVE-2026-23224","markdown":"https://insights.sbomify.com/CVE-2026-23224/index.md","name":"CVE-2026-23224","record":{"aliases":["BELL-CVE-2026-23224","DEBIAN-CVE-2026-23224","GHSA-8j5g-3q2r-xfjh","ROOT-OS-DEBIAN-11-CVE-2026-23224","ROOT-OS-DEBIAN-12-CVE-2026-23224","UBUNTU-CVE-2026-23224"],"analysis":{"component_type":"kernel","fix_type":"patch","impacts":["denial_of_service","code_execution"],"network_reachable":"adjacent_or_local","non_default_config":true,"product_category":"Linux kernel EROFS","requires_auth":"low_privilege","summary":"A use-after-free vulnerability in the Linux kernel EROFS filesystem allows local attackers to cause a system crash or potentially execute code when using file-backed mounts with the directio option.","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\nerofs: fix UAF issue for file-backed mounts w/ directio option\n\n[    9.269940][ T3222] Call trace:\n[    9.269948][ T3222]  ext4_file_read_iter+0xac/0x108\n[    9.269979][ T3222]  vfs_iocb_iter_read+0xac/0x198\n[    9.269993][ T3222]  erofs_fileio_rq_submit+0x12c/0x180\n[    9.270008][ T3222]  erofs_fileio_submit_bio+0x14/0x24\n[    9.270030][ T3222]  z_erofs_runqueue+0x834/0x8ac\n[    9.270054][ T3222]  z_erofs_read_folio+0x120/0x220\n[    9.270083][ T3222]  filemap_read_folio+0x60/0x120\n[    9.270102][ T3222]  filemap_fault+0xcac/0x1060\n[    9.270119][ T3222]  do_pte_missing+0x2d8/0x1554\n[    9.270131][ T3222]  handle_mm_fault+0x5ec/0x70c\n[    9.270142][ T3222]  do_page_fault+0x178/0x88c\n[    9.270167][ T3222]  do_translation_fault+0x38/0x54\n[    9.270183][ T3222]  do_mem_abort+0x54/0xac\n[    9.270208][ T3222]  el0_da+0x44/0x7c\n[    9.270227][ T3222]  el0t_64_sync_handler+0x5c/0xf4\n[    9.270253][ T3222]  el0t_64_sync+0x1bc/0x1c0\n\nEROFS may encounter above panic when enabling file-backed mount w/\ndirectio mount option, the root cause is it may suffer UAF in below\nrace condition:\n\n- z_erofs_read_folio                          wq s_dio_done_wq\n - z_erofs_runqueue\n  - erofs_fileio_submit_bio\n   - erofs_fileio_rq_submit\n    - vfs_iocb_iter_read\n     - ext4_file_read_iter\n      - ext4_dio_read_iter\n       - iomap_dio_rw\n       : bio was submitted and return -EIOCBQUEUED\n                                              - dio_aio_complete_work\n                                               - dio_complete\n                                                - dio-\u003eiocb-\u003eki_complete (erofs_fileio_ki_complete())\n                                                 - kfree(rq)\n                                                 : it frees iocb, iocb.ki_filp can be UAF in file_accessed().\n       - file_accessed\n       : access NULL file point\n\nIntroduce a reference count in struct erofs_fileio_rq, and initialize it\nas two, both erofs_fileio_ki_complete() and erofs_fileio_rq_submit() will\ndecrease reference count, the last one decreasing the reference count\nto zero will free rq.","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":"erofs: fix UAF issue for file-backed mounts w/ directio option","id":"CVE-2026-23224","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"use_after_free","year":"2026"},"n_packages":0,"n_references":4,"next":{"headline":"sched/mmcid: Don't assume CID is CPU owned on mode switch","id":"CVE-2026-23225"},"packages":[],"prev":{"headline":"xfs: fix UAF in xchk_btree_check_block_owner","id":"CVE-2026-23223"},"products":["Linux"],"published":"2026-02-18","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":"2026-08-05","vendors":["Linux"]},"summary":"A use-after-free vulnerability in the Linux kernel EROFS filesystem allows local attackers to cause a system crash or potentially execute code when using file-backed mounts with the directio option.","url":"https://insights.sbomify.com/CVE-2026-23224/"}