{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-64065 in the wild and no public exploit code.","fix":"Apply the vendor's patch.","what":"CVE-2026-64065 is a medium-severity denial of service vulnerability in Linux kernel, published on 19 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-2026-64065 and fix it if it is affected.\n\nWhat it is: CVE-2026-64065 is a medium-severity denial of service vulnerability in Linux kernel, published on 19 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-2026-64065 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-2026-64065/ (Markdown: https://insights.sbomify.com/CVE-2026-64065/index.md)","id":"CVE-2026-64065","markdown":"https://insights.sbomify.com/CVE-2026-64065/index.md","name":"CVE-2026-64065","record":{"aliases":["BELL-CVE-2026-64065","DEBIAN-CVE-2026-64065","GHSA-23r9-pmc9-fcx4","UBUNTU-CVE-2026-64065"],"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 race condition in the Linux kernel netfs subsystem causes a kernel BUG and system crash during specific file write operations.","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":[],"description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: fix VM_BUG_ON_FOLIO() issue in netfs_write_begin() call\n\nThe multiple runs of generic/013 test-case is capable\nto reproduce a kernel BUG at mm/filemap.c:1504 with\nprobability of 30%.\n\nwhile true; do\n  sudo ./check generic/013\ndone\n\n[ 9849.452376] page: refcount:3 mapcount:0 mapping:00000000e58ff252 index:0x10781 pfn:0x1c322\n[ 9849.452412] memcg:ffff8881a1915800\n[ 9849.452417] aops:ceph_aops ino:1000058db9e dentry name(?):\"f9XXXXXX\"\n[ 9849.452432] flags: 0x17ffffc0000000(node=0|zone=2|lastcpupid=0x1fffff)\n[ 9849.452441] raw: 0017ffffc0000000 0000000000000000 dead000000000122 ffff88816110d248\n[ 9849.452445] raw: 0000000000010781 0000000000000000 00000003ffffffff ffff8881a1915800\n[ 9849.452447] page dumped because: VM_BUG_ON_FOLIO(!folio_test_locked(folio))\n[ 9849.452474] ------------[ cut here ]------------\n[ 9849.452476] kernel BUG at mm/filemap.c:1504!\n[ 9849.478635] Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI\n[ 9849.481772] CPU: 2 UID: 0 PID: 84223 Comm: fsstress Not tainted 7.0.0-rc1+ #18 PREEMPT(full)\n[ 9849.482881] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.17.0-9.fc43 06/1\n0/2025\n[ 9849.484539] RIP: 0010:folio_unlock+0x85/0xa0\n[ 9849.485076] Code: 89 df 31 f6 e8 1c f3 ff ff 48 8b 5d f8 c9 31 c0 31 d2 31 f6 31 ff c3 cc\ncc cc cc 48 c7 c6 80 6c d9 a7 48 89 df e8 4b b3 10 00 \u003c0f\u003e 0b 48 89 df e8 21 e6 2c 00 eb 9d 0f 1f 40 00 66 66 2e 0f 1f 84\n[ 9849.493818] RSP: 0018:ffff8881bb8076b0 EFLAGS: 00010246\n[ 9849.495740] RAX: 0000000000000000 RBX: ffffea00070c8980 RCX: 0000000000000000\n[ 9849.498678] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000\n[ 9849.500559] RBP: ffff8881bb8076b8 R08: 0000000000000000 R09: 0000000000000000\n[ 9849.501097] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000010782000\n[ 9849.502108] R13: ffff8881935de738 R14: ffff88816110d010 R15: 0000000000001000\n[ 9849.502516] FS:  00007e36cbe94740(0000) GS:ffff88824a899000(0000) knlGS:0000000000000000\n[ 9849.502996] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 9849.503810] CR2: 000000c0002b0000 CR3: 000000011bbf6004 CR4: 0000000000772ef0\n[ 9849.504459] PKRU: 55555554\n[ 9849.504626] Call Trace:\n[ 9849.505242]  \u003cTASK\u003e\n[ 9849.505379]  netfs_write_begin+0x7c8/0x10a0\n[ 9849.505877]  ? __kasan_check_read+0x11/0x20\n[ 9849.506384]  ? __pfx_netfs_write_begin+0x10/0x10\n[ 9849.507178]  ceph_write_begin+0x8c/0x1c0\n[ 9849.507934]  generic_perform_write+0x391/0x8f0\n[ 9849.508503]  ? __pfx_generic_perform_write+0x10/0x10\n[ 9849.509062]  ? file_update_time_flags+0x19a/0x4b0\n[ 9849.509581]  ? ceph_get_caps+0x63/0xf0\n[ 9849.510259]  ? ceph_get_caps+0x63/0xf0\n[ 9849.510530]  ceph_write_iter+0xe79/0x1ae0\n[ 9849.511282]  ? __pfx_ceph_write_iter+0x10/0x10\n[ 9849.511839]  ? lock_acquire+0x1ad/0x310\n[ 9849.512334]  ? ksys_write+0xf9/0x230\n[ 9849.512582]  ? lock_is_held_type+0xaa/0x140\n[ 9849.513128]  vfs_write+0x512/0x1110\n[ 9849.513634]  ? __fget_files+0x33/0x350\n[ 9849.513893]  ? __pfx_vfs_write+0x10/0x10\n[ 9849.514143]  ? mutex_lock_nested+0x1b/0x30\n[ 9849.514394]  ksys_write+0xf9/0x230\n[ 9849.514621]  ? __pfx_ksys_write+0x10/0x10\n[ 9849.514887]  ? do_syscall_64+0x25e/0x1520\n[ 9849.515122]  ? __kasan_check_read+0x11/0x20\n[ 9849.515366]  ? trace_hardirqs_on_prepare+0x178/0x1c0\n[ 9849.515655]  __x64_sys_write+0x72/0xd0\n[ 9849.515885]  ? trace_hardirqs_on+0x24/0x1c0\n[ 9849.516130]  x64_sys_call+0x22f/0x2390\n[ 9849.516341]  do_syscall_64+0x12b/0x1520\n[ 9849.516545]  ? do_syscall_64+0x27c/0x1520\n[ 9849.516783]  ? do_syscall_64+0x27c/0x1520\n[ 9849.517003]  ? lock_release+0x318/0x480\n[ 9849.517220]  ? __x64_sys_io_getevents+0x143/0x2d0\n[ 9849.517479]  ? percpu_ref_put_many.constprop.0+0x8f/0x210\n[ 9849.517779]  ? entry_SYSCALL_64_after_hwframe+0x76/0x7e\n[ 9849.518073]  ? do_syscall_64+0x25e/0x1520\n[ 9849.518291]  ? __kasan_check_read+0x11/0x20\n[ 9849.518519]  ? trace_hardirqs_on_prepare+0x178/0x1c0\n[ 9849.518799]  ? do_syscall_64+0x27c/0x1520\n[ 9\n---truncated---","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":"netfs: fix VM_BUG_ON_FOLIO() issue in netfs_write_begin() call","id":"CVE-2026-64065","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":4,"next":{"headline":"netfs: Fix netfs_read_to_pagecache() to pause on subreq failure","id":"CVE-2026-64066"},"packages":[],"prev":{"headline":"netfs: Fix netfs_invalidate_folio() to clear dirty bit if all changes gone","id":"CVE-2026-64064"},"products":["Linux"],"published":"2026-07-19","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":"2026-07-19","vendors":["Linux"]},"summary":"A race condition in the Linux kernel netfs subsystem causes a kernel BUG and system crash during specific file write operations.","url":"https://insights.sbomify.com/CVE-2026-64065/"}