CVE-2026-74351

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74351", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.886Z", "datePublished": "2026-08-15T05:58:37.967Z", "dateUpdated": "2026-11-06T17:05:44.842Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:17:44.780Z"}, "descriptions": [{"lang": "en", "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"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/ocfs2/dlmglue.c"], "versions": [{"version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622", "lessThan": "185427b5f7a209254c85c18aad5a4a8e009b2f30", "status": "affected", "versionType": "git"}, {"version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622", "lessThan": "07aa4a8ebacde3d0ba50f60d2964f274ee7629bc", "status": "affected", "versionType": "git"}, {"version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622", "lessThan": "e037c1250cc90e7aacb002357d1b0399fc65ecfc", "status": "affected", "versionType": "git"}, {"version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622", "lessThan": "6b38a5b8ee951e5b244e9a3c3d28d0f5e7c51411", "status": "affected", "versionType": "git"}, {"version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622", "lessThan": "8614a8f7e81edd34c9f67e454e7024fd12a2a341", "status": "affected", "versionType": "git"}, {"version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622", "lessThan": "bb44a7690a4d553da705919cf666a80f5ca9011c", "status": "affected", "versionType": "git"}, {"version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622", "lessThan": "610a0d2a35496738e1472fb0f318d5008a1c634f", "status": "affected", "versionType": "git"}, {"version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622", "lessThan": "93612d48fa42b3d1a637eb9279e15281c611c000", "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/ocfs2/dlmglue.c"], "versions": [{"version": "2.6.26", "status": "affected"}, {"version": "0", "lessThan": "2.6.26", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "2.6.26", "versionEndExcluding": "5.10.261"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "5.15.212"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "6.1.178"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "6.6.145"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.26", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/185427b5f7a209254c85c18aad5a4a8e009b2f30"}, {"url": "https://git.kernel.org/stable/c/07aa4a8ebacde3d0ba50f60d2964f274ee7629bc"}, {"url": "https://git.kernel.org/stable/c/e037c1250cc90e7aacb002357d1b0399fc65ecfc"}, {"url": "https://git.kernel.org/stable/c/6b38a5b8ee951e5b244e9a3c3d28d0f5e7c51411"}, {"url": "https://git.kernel.org/stable/c/8614a8f7e81edd34c9f67e454e7024fd12a2a341"}, {"url": "https://git.kernel.org/stable/c/bb44a7690a4d553da705919cf666a80f5ca9011c"}, {"url": "https://git.kernel.org/stable/c/610a0d2a35496738e1472fb0f318d5008a1c634f"}, {"url": "https://git.kernel.org/stable/c/93612d48fa42b3d1a637eb9279e15281c611c000"}], "title": "ocfs2: rebase copied fsdlm LVB pointers in locking_state", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-74351", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-06T16:56:32.114412Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-06T17:05:44.842Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-74351", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-06T16:56:32.114412Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-11-06T16:56:33.515Z"}}], "cna": {"title": "ocfs2: rebase copied fsdlm LVB pointers in locking_state", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622", "lessThan": "185427b5f7a209254c85c18aad5a4a8e009b2f30", "versionType": "git"}, {"status": "affected", "version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622", "lessThan": "07aa4a8ebacde3d0ba50f60d2964f274ee7629bc", "versionType": "git"}, {"status": "affected", "version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622", "lessThan": "e037c1250cc90e7aacb002357d1b0399fc65ecfc", "versionType": "git"}, {"status": "affected", "version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622", "lessThan": "6b38a5b8ee951e5b244e9a3c3d28d0f5e7c51411", "versionType": "git"}, {"status": "affected", "version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622", "lessThan": "8614a8f7e81edd34c9f67e454e7024fd12a2a341", "versionType": "git"}, {"status": "affected", "version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622", "lessThan": "bb44a7690a4d553da705919cf666a80f5ca9011c", "versionType": "git"}, {"status": "affected", "version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622", "lessThan": "610a0d2a35496738e1472fb0f318d5008a1c634f", "versionType": "git"}, {"status": "affected", "version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622", "lessThan": "93612d48fa42b3d1a637eb9279e15281c611c000", "versionType": "git"}], "programFiles": ["fs/ocfs2/dlmglue.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "2.6.26"}, {"status": "unaffected", "version": "0", "lessThan": "2.6.26", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.261", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.212", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.178", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.145", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.97", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.40", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.5", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["fs/ocfs2/dlmglue.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/185427b5f7a209254c85c18aad5a4a8e009b2f30"}, {"url": "https://git.kernel.org/stable/c/07aa4a8ebacde3d0ba50f60d2964f274ee7629bc"}, {"url": "https://git.kernel.org/stable/c/e037c1250cc90e7aacb002357d1b0399fc65ecfc"}, {"url": "https://git.kernel.org/stable/c/6b38a5b8ee951e5b244e9a3c3d28d0f5e7c51411"}, {"url": "https://git.kernel.org/stable/c/8614a8f7e81edd34c9f67e454e7024fd12a2a341"}, {"url": "https://git.kernel.org/stable/c/bb44a7690a4d553da705919cf666a80f5ca9011c"}, {"url": "https://git.kernel.org/stable/c/610a0d2a35496738e1472fb0f318d5008a1c634f"}, {"url": "https://git.kernel.org/stable/c/93612d48fa42b3d1a637eb9279e15281c611c000"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "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"}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.261", "versionStartIncluding": "2.6.26"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.212", "versionStartIncluding": "2.6.26"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.178", "versionStartIncluding": "2.6.26"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.6.145", "versionStartIncluding": "2.6.26"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.12.97", "versionStartIncluding": "2.6.26"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.40", "versionStartIncluding": "2.6.26"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1.5", "versionStartIncluding": "2.6.26"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.2", "versionStartIncluding": "2.6.26"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:17:44.780Z"}}}, "cveMetadata": {"cveId": "CVE-2026-74351", "state": "PUBLISHED", "dateUpdated": "2026-11-06T17:05:44.842Z", "dateReserved": "2026-08-15T05:44:03.886Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-08-15T05:58:37.967Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["fs/ocfs2/dlmglue.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "185427b5f7a209254c85c18aad5a4a8e009b2f30", "status": "affected", "version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622", "versionType": "git"}, {"lessThan": "07aa4a8ebacde3d0ba50f60d2964f274ee7629bc", "status": "affected", "version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622", "versionType": "git"}, {"lessThan": "e037c1250cc90e7aacb002357d1b0399fc65ecfc", "status": "affected", "version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622", "versionType": "git"}, {"lessThan": "6b38a5b8ee951e5b244e9a3c3d28d0f5e7c51411", "status": "affected", "version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622", "versionType": "git"}, {"lessThan": "8614a8f7e81edd34c9f67e454e7024fd12a2a341", "status": "affected", "version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622", "versionType": "git"}, {"lessThan": "bb44a7690a4d553da705919cf666a80f5ca9011c", "status": "affected", "version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622", "versionType": "git"}, {"lessThan": "610a0d2a35496738e1472fb0f318d5008a1c634f", "status": "affected", "version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622", "versionType": "git"}, {"lessThan": "93612d48fa42b3d1a637eb9279e15281c611c000", "status": "affected", "version": "cf4d8d75d8aba537a19b313a9364fd08ddbd5622", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["fs/ocfs2/dlmglue.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.26"}, {"lessThan": "2.6.26", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.261", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.212", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.178", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.145", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "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"}], "id": "CVE-2026-74351", "lastModified": "2026-11-06T17:19:46.990", "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-74351", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:56:32.114412Z", "version": "2.0.3"}}]}, "published": "2026-08-15T06:22:36.383", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/07aa4a8ebacde3d0ba50f60d2964f274ee7629bc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/185427b5f7a209254c85c18aad5a4a8e009b2f30"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/610a0d2a35496738e1472fb0f318d5008a1c634f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6b38a5b8ee951e5b244e9a3c3d28d0f5e7c51411"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8614a8f7e81edd34c9f67e454e7024fd12a2a341"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/93612d48fa42b3d1a637eb9279e15281c611c000"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bb44a7690a4d553da705919cf666a80f5ca9011c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e037c1250cc90e7aacb002357d1b0399fc65ecfc"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: ocfs2: rebase copied fsdlm LVB pointers in locking_state", "id": "2516882", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516882"}, "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-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nocfs2: rebase copied fsdlm LVB pointers in locking_state\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.\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.\nThe buggy scenario involves two paths, with each column showing the order\nwithin that path:\nlocking_state reader: lockres teardown:\n1. ocfs2_dlm_seq_start()/next() 1. file release or another owner\ncopies struct ocfs2_lock_res teardown reaches\n2. ocfs2_dlm_seq_show() formats ocfs2_lock_res_free()\nthe copied row 2. the lockres is removed from the\n3. ocfs2_dlm_lvb() follows the tracking list\ncopied sb_lvbptr 3. the owner frees the original\nlockres container\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:\ndump_stack_lvl+0x66/0xa0\nprint_report+0xce/0x630\nocfs2_dlm_seq_show+0x1bd/0x430 (fs/ocfs2/dlmglue.c:3137)\nsrso_alias_return_thunk+0x5/0xfbef5\n__virt_addr_valid+0x19f/0x330\nkasan_report+0xe0/0x110\nseq_read_iter+0x29d/0x790\nseq_read+0x20a/0x280\nfind_held_lock+0x2b/0x80\nrcu_read_unlock+0x18/0x70\nfull_proxy_read+0x9e/0xd0\nvfs_read+0x12c/0x590\nksys_read+0xd2/0x170\ndo_user_addr_fault+0x65a/0x890\ndo_syscall_64+0x115/0x6a0 (arch/x86/entry/syscall_64.c:87)\nentry_SYSCALL_64_after_hwframe+0x77/0x7f\nAllocated by task stack:\nkasan_save_stack+0x33/0x60\nkasan_save_track+0x14/0x30\n__kasan_kmalloc+0xaa/0xb0\nocfs2_file_open+0x13e/0x300\ndo_dentry_open+0x233/0x7f0\nvfs_open+0x5a/0x1b0\npath_openat+0x66d/0x1540\ndo_file_open+0x186/0x2b0\ndo_sys_openat2+0xce/0x150\n__x64_sys_openat+0xd0/0x140\ndo_syscall_64+0x115/0x6a0 (arch/x86/entry/syscall_64.c:87)\nentry_SYSCALL_64_after_hwframe+0x77/0x7f\nFreed by task stack:\nkasan_save_stack+0x33/0x60\nkasan_save_track+0x14/0x30\nkasan_save_free_info+0x3b/0x60\n__kasan_slab_free+0x5f/0x80\nkfree+0x313/0x590\nocfs2_file_release+0x138/0x260\n__fput+0x1df/0x4b0\nfput_close_sync+0xd2/0x170\n__x64_sys_close+0x55/0x90\ndo_syscall_64+0x115/0x6a0 (arch/x86/entry/syscall_64.c:87)\nentry_SYSCALL_64_after_hwframe+0x77/0x7f", "A flaw was found in the `ocfs2` component of the Linux kernel. The `locking_state` debugfs iterator incorrectly handles pointers to lock resource blocks (LVB). When the original lock resource is freed while the iterator still holds a pointer to it, a use-after-free vulnerability occurs. This can lead to a system crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-74351", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "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": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74351\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74351\nhttps://lore.kernel.org/linux-cve-announce/2026081559-CVE-2026-74351-7982@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cf4d8d75d8aba537a19b313a9364fd08ddbd5622,185427b5f7a209254c85c18aad5a4a8e009b2f30)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cf4d8d75d8aba537a19b313a9364fd08ddbd5622,07aa4a8ebacde3d0ba50f60d2964f274ee7629bc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cf4d8d75d8aba537a19b313a9364fd08ddbd5622,e037c1250cc90e7aacb002357d1b0399fc65ecfc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cf4d8d75d8aba537a19b313a9364fd08ddbd5622,6b38a5b8ee951e5b244e9a3c3d28d0f5e7c51411)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cf4d8d75d8aba537a19b313a9364fd08ddbd5622,8614a8f7e81edd34c9f67e454e7024fd12a2a341)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cf4d8d75d8aba537a19b313a9364fd08ddbd5622,bb44a7690a4d553da705919cf666a80f5ca9011c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cf4d8d75d8aba537a19b313a9364fd08ddbd5622,610a0d2a35496738e1472fb0f318d5008a1c634f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[cf4d8d75d8aba537a19b313a9364fd08ddbd5622,93612d48fa42b3d1a637eb9279e15281c611c000)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.26"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.26)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.261,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.212,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-08-15T13:00:05.628003+00:00", "updated": "2026-08-22T03:30:16.793110+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}