282 lines
16 KiB
JSON
282 lines
16 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-74351",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-08-15T05:44:03.886Z",
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"datePublished": "2026-08-15T05:58:37.967Z",
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"dateUpdated": "2026-11-06T17:05:44.842Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-17T05:17:44.780Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: rebase copied fsdlm LVB pointers in locking_state\n\nThe locking_state debugfs iterator snapshots struct ocfs2_lock_res by\nvalue under ocfs2_dlm_tracking_lock and later formats that copy in\nocfs2_dlm_seq_show(). That is fine for the inline fields, but the\nuserspace fsdlm stack stores the LVB through lksb_fsdlm.sb_lvbptr. Once\nthe iterator drops the tracking lock, a copied non-NULL sb_lvbptr still\npoints into the original lockres owner, so teardown can free that\ncontainer before the debugfs dump walks the raw LVB bytes.\n\nRebase the copied sb_lvbptr to the copied l_lksb before dumping the raw\nLVB. The seq snapshot already carries the inline LVB storage reserved in\nstruct ocfs2_dlm_lksb, so the debugfs reader can dump the copied bytes\nwithout borrowing the original lockres lifetime.\n\nThe buggy scenario involves two paths, with each column showing the order\nwithin that path:\n\nlocking_state reader: lockres teardown:\n1. ocfs2_dlm_seq_start()/next() 1. file release or another owner\n copies struct ocfs2_lock_res teardown reaches\n2. ocfs2_dlm_seq_show() formats ocfs2_lock_res_free()\n the copied row 2. the lockres is removed from the\n3. ocfs2_dlm_lvb() follows the tracking list\n copied sb_lvbptr 3. the owner frees the original\n lockres container\n\nValidation reproduced this kernel report:\nKASAN slab-use-after-free in ocfs2_dlm_seq_show+0x1bd/0x430\nRIP: 0033:0x7f8ec4b1e29d\nThe buggy address belongs to the object at ffff88810a1e0800 which belongs\nto the cache kmalloc-1k of size 1024\nThe buggy address is located 368 bytes inside of freed 1024-byte region\n[ffff88810a1e0800, ffff88810a1e0c00)\nRead of size 1\nCall trace:\n dump_stack_lvl+0x66/0xa0\n print_report+0xce/0x630\n ocfs2_dlm_seq_show+0x1bd/0x430 (fs/ocfs2/dlmglue.c:3137)\n srso_alias_return_thunk+0x5/0xfbef5\n __virt_addr_valid+0x19f/0x330\n kasan_report+0xe0/0x110\n seq_read_iter+0x29d/0x790\n seq_read+0x20a/0x280\n find_held_lock+0x2b/0x80\n rcu_read_unlock+0x18/0x70\n full_proxy_read+0x9e/0xd0\n vfs_read+0x12c/0x590\n ksys_read+0xd2/0x170\n do_user_addr_fault+0x65a/0x890\n do_syscall_64+0x115/0x6a0 (arch/x86/entry/syscall_64.c:87)\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nAllocated by task stack:\n kasan_save_stack+0x33/0x60\n kasan_save_track+0x14/0x30\n __kasan_kmalloc+0xaa/0xb0\n ocfs2_file_open+0x13e/0x300\n do_dentry_open+0x233/0x7f0\n vfs_open+0x5a/0x1b0\n path_openat+0x66d/0x1540\n do_file_open+0x186/0x2b0\n do_sys_openat2+0xce/0x150\n __x64_sys_openat+0xd0/0x140\n do_syscall_64+0x115/0x6a0 (arch/x86/entry/syscall_64.c:87)\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\nFreed by task stack:\n kasan_save_stack+0x33/0x60\n kasan_save_track+0x14/0x30\n kasan_save_free_info+0x3b/0x60\n __kasan_slab_free+0x5f/0x80\n kfree+0x313/0x590\n ocfs2_file_release+0x138/0x260\n __fput+0x1df/0x4b0\n fput_close_sync+0xd2/0x170\n __x64_sys_close+0x55/0x90\n do_syscall_64+0x115/0x6a0 (arch/x86/entry/syscall_64.c:87)\n entry_SYSCALL_64_after_hwframe+0x77/0x7f"
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/ocfs2/dlmglue.c"
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],
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"versions": [
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{
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"version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622",
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"lessThan": "185427b5f7a209254c85c18aad5a4a8e009b2f30",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622",
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"lessThan": "07aa4a8ebacde3d0ba50f60d2964f274ee7629bc",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622",
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"lessThan": "e037c1250cc90e7aacb002357d1b0399fc65ecfc",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622",
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"lessThan": "6b38a5b8ee951e5b244e9a3c3d28d0f5e7c51411",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622",
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"lessThan": "8614a8f7e81edd34c9f67e454e7024fd12a2a341",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622",
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"lessThan": "bb44a7690a4d553da705919cf666a80f5ca9011c",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622",
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"lessThan": "610a0d2a35496738e1472fb0f318d5008a1c634f",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622",
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"lessThan": "93612d48fa42b3d1a637eb9279e15281c611c000",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/ocfs2/dlmglue.c"
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],
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"versions": [
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{
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"version": "2.6.26",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "2.6.26",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.261",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.212",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.178",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.145",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.97",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.40",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.5",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.26",
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"versionEndExcluding": "5.10.261"
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},
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.26",
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"versionEndExcluding": "6.6.145"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.26",
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "2.6.26",
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"versionEndExcluding": "7.1.5"
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},
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{
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/185427b5f7a209254c85c18aad5a4a8e009b2f30"
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},
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{
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"url": "https://git.kernel.org/stable/c/07aa4a8ebacde3d0ba50f60d2964f274ee7629bc"
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},
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{
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"url": "https://git.kernel.org/stable/c/e037c1250cc90e7aacb002357d1b0399fc65ecfc"
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},
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{
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"url": "https://git.kernel.org/stable/c/6b38a5b8ee951e5b244e9a3c3d28d0f5e7c51411"
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},
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{
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"url": "https://git.kernel.org/stable/c/8614a8f7e81edd34c9f67e454e7024fd12a2a341"
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},
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{
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"url": "https://git.kernel.org/stable/c/bb44a7690a4d553da705919cf666a80f5ca9011c"
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},
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{
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"url": "https://git.kernel.org/stable/c/610a0d2a35496738e1472fb0f318d5008a1c634f"
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},
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{
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"url": "https://git.kernel.org/stable/c/93612d48fa42b3d1a637eb9279e15281c611c000"
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}
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],
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"title": "ocfs2: rebase copied fsdlm LVB pointers in locking_state",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-74351",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "partial"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-11-06T16:56:32.114412Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-11-06T17:05:44.842Z"
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}
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}
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]
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}
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} |