{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-53342 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-53342 is a medium-severity memory corruption vulnerability in Linux kernel, published on 1 Jul 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-2026-53342 and fix it if it is affected.\n\nWhat it is: CVE-2026-53342 is a medium-severity memory corruption vulnerability in Linux kernel, published on 1 Jul 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-2026-53342 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-2026-53342/ (Markdown: https://insights.sbomify.com/CVE-2026-53342/index.md)","id":"CVE-2026-53342","markdown":"https://insights.sbomify.com/CVE-2026-53342/index.md","name":"CVE-2026-53342","record":{"aliases":["BELL-CVE-2026-53342","DEBIAN-CVE-2026-53342","GHSA-w39q-f6gf-xv3r","UBUNTU-CVE-2026-53342"],"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":"Missing destructor calls during hot-remove page table freeing cause kernel warnings and potential memory leaks, requiring a patch to fix.","user_interaction":"not_required","vuln_class":"memory_corruption"},"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":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\narm64: mm: call pagetable dtor when freeing hot-removed page tables\n\nSince 5e8eb9aeeda3 (\"arm64: mm: always call PTE/PMD ctor in\n__create_pgd_mapping()\") page-table allocation on ARM64 always calls\npagetable_{pte,pmd,pud,p4d}_ctor().  This sets the page_type to\nPGTY_table, increments NR_PAGETABLE and possible allocates a PTL.  However\nthe matching pagetable_dtor() calls were never added.\n\nWith DEBUG_VM enabled on kernel versions prior to v6.17 without\n2dfcd1608f3a9 (\"mm/page_alloc: let page freeing clear any set page type\")\nthis leads to the following warning when freeing these pages due to\npage-\u003epage_type sharing page-\u003e_mapcount:\n\n  BUG: Bad page state in process ... pfn:284fbb\n  page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x284fbb\n  flags: 0x17fffc000000000(node=0|zone=2|lastcpupid=0x1ffff)\n  page_type: f2(table)\n  page dumped because: nonzero mapcount\n  Call trace:\n   bad_page+0x13c/0x160\n   __free_frozen_pages+0x6cc/0x860\n   ___free_pages+0xf4/0x180\n   free_pages+0x54/0x80\n   free_hotplug_page_range.part.0+0x58/0x90\n   free_empty_tables+0x438/0x500\n   __remove_pgd_mapping.constprop.0+0x60/0xa8\n   arch_remove_memory+0x48/0x80\n   try_remove_memory+0x158/0x1d8\n   offline_and_remove_memory+0x138/0x180\n\nIt can also lead to leaking the ptl allocation if ALLOC_SPLIT_PTLOCKS is\ndefined and incorrect NR_PAGETABLE stats.  Fix this by calling\npagetable_dtor() in free_hotplug_pgtable_page() prior to freeing the page\nto undo the effects of calling pagetable_*_ctor().","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":"arm64: mm: call pagetable dtor when freeing hot-removed page tables","id":"CVE-2026-53342","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"linux:linux_kernel","products":["linux:linux_kernel"],"type":"memory_corruption","year":"2026"},"n_packages":0,"n_references":3,"next":{"headline":"ARM: 9475/1: entry: use byte load for KASAN VMAP stack shadow","id":"CVE-2026-53343"},"packages":[],"prev":{"headline":"fhandle: fix UAF due to unlocked -\u003emnt_ns read in may_decode_fh()","id":"CVE-2026-53341"},"products":["Linux"],"published":"2026-07-01","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":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2026-07-01","vendors":["Linux"]},"summary":"Missing destructor calls during hot-remove page table freeing cause kernel warnings and potential memory leaks, requiring a patch to fix.","url":"https://insights.sbomify.com/CVE-2026-53342/"}