{"cvss":5.5,"datePublished":"2026-07-19T16:17:47.053","dateUpdated":"2026-09-03T15:35:54.180","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 <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---","id":"CVE-2026-64065","raw":{"affected":[{"affectedData":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/netfs/read_retry.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"51ffb788f074c0a61953086f49008028c1e7b645","status":"affected","version":"ee4cdf7ba857a894ad1650d6ab77669cbbfa329e","versionType":"git"},{"lessThan":"b63971238beb79cf701dac33c6cefc56c07c89fa","status":"affected","version":"ee4cdf7ba857a894ad1650d6ab77669cbbfa329e","versionType":"git"},{"lessThan":"5ad05b6f5df296ef046589f222bb2587495b991e","status":"affected","version":"ee4cdf7ba857a894ad1650d6ab77669cbbfa329e","versionType":"git"},{"lessThan":"dc7832d05deb4d632e8035e3299e31a3528fa0d0","status":"affected","version":"ee4cdf7ba857a894ad1650d6ab77669cbbfa329e","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/netfs/read_retry.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.12"},{"lessThan":"6.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.92","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.34","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.11","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]}],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"configurations":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"9574AA5E-61DC-4F38-82BC-69F89AA7593C","versionEndExcluding":"6.12.92","versionStartIncluding":"6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"A4B1EF6D-18D7-4838-BC37-7499D5DCC3C0","versionEndExcluding":"6.18.34","versionStartIncluding":"6.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","matchCriteriaId":"0520D091-FC52-4A50-AF07-70AE7D08B750","versionEndExcluding":"7.0.11","versionStartIncluding":"6.19","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:*","matchCriteriaId":"B1EF7059-E670-45F4-B422-54C40FA86390","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:*","matchCriteriaId":"0D38F0BF-A728-4133-A358-D44A2F7EE6D6","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:*","matchCriteriaId":"EC732D08-5F7B-46D9-B154-E60C7F4F0A97","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:*","matchCriteriaId":"E5910A9D-F60A-409A-B486-FE66BFEBA9B9","vulnerable":true}],"negate":false,"operator":"OR"}]}],"cveTags":[],"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---"}],"id":"CVE-2026-64065","lastModified":"2026-09-03T15:35:54.180","metrics":{"cvssMetricV31":[{"cvssData":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":5.5,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"exploitabilityScore":1.8,"impactScore":3.6,"source":"nvd@nist.gov","type":"Primary"}]},"published":"2026-07-19T16:17:47.053","references":[{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/51ffb788f074c0a61953086f49008028c1e7b645"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/5ad05b6f5df296ef046589f222bb2587495b991e"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/b63971238beb79cf701dac33c6cefc56c07c89fa"},{"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"url":"https://git.kernel.org/stable/c/dc7832d05deb4d632e8035e3299e31a3528fa0d0"}],"sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","vulnStatus":"Analyzed","weaknesses":[{"description":[{"lang":"en","value":"NVD-CWE-noinfo"}],"source":"nvd@nist.gov","type":"Primary"}]},"severity":"MEDIUM","source":"nvd","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: fix VM_BUG_ON_FOLIO() issue in netfs_writ..."}