{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-64065", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.030Z", "datePublished": "2026-07-19T15:39:43.397Z", "dateUpdated": "2026-07-19T15:39:43.397Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-07-19T15:39:43.397Z"}, "descriptions": [{"lang": "en", "value": "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 <0f> 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] <TASK>\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---"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/netfs/read_retry.c"], "versions": [{"version": "ee4cdf7ba857a894ad1650d6ab77669cbbfa329e", "lessThan": "51ffb788f074c0a61953086f49008028c1e7b645", "status": "affected", "versionType": "git"}, {"version": "ee4cdf7ba857a894ad1650d6ab77669cbbfa329e", "lessThan": "b63971238beb79cf701dac33c6cefc56c07c89fa", "status": "affected", "versionType": "git"}, {"version": "ee4cdf7ba857a894ad1650d6ab77669cbbfa329e", "lessThan": "5ad05b6f5df296ef046589f222bb2587495b991e", "status": "affected", "versionType": "git"}, {"version": "ee4cdf7ba857a894ad1650d6ab77669cbbfa329e", "lessThan": "dc7832d05deb4d632e8035e3299e31a3528fa0d0", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/netfs/read_retry.c"], "versions": [{"version": "6.12", "status": "affected"}, {"version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.92", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.34", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.11", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.12.92"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.18.34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.0.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/51ffb788f074c0a61953086f49008028c1e7b645"}, {"url": "https://git.kernel.org/stable/c/b63971238beb79cf701dac33c6cefc56c07c89fa"}, {"url": "https://git.kernel.org/stable/c/5ad05b6f5df296ef046589f222bb2587495b991e"}, {"url": "https://git.kernel.org/stable/c/dc7832d05deb4d632e8035e3299e31a3528fa0d0"}], "title": "netfs: fix VM_BUG_ON_FOLIO() issue in netfs_write_begin() call", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{}

{"bugzilla": {"description": "kernel: netfs: fix VM_BUG_ON_FOLIO() issue in netfs_write_begin() call", "id": "2502597", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502597"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-832", "details": ["A flaw was found in the Linux kernel's network file system (netfs) component. This vulnerability, located in the netfs_write_begin() function, can be triggered by a local user through specific file system operations. Successful exploitation leads to a kernel bug and system crash, resulting in a denial of service (DoS) for the affected system."], "name": "CVE-2026-64065", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64065\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64065\nhttps://lore.kernel.org/linux-cve-announce/2026071911-CVE-2026-64065-d010@gregkh/T"], "threat_severity": "Moderate"}

{}