{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2022-50648", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-08T23:57:43.371Z", "datePublished": "2025-12-09T00:00:22.410Z", "dateUpdated": "2025-12-09T00:00:22.410Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-12-09T00:00:22.410Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nftrace: Fix recursive locking direct_mutex in ftrace_modify_direct_caller\n\nNaveen reported recursive locking of direct_mutex with sample\nftrace-direct-modify.ko:\n\n[ 74.762406] WARNING: possible recursive locking detected\n[ 74.762887] 6.0.0-rc6+ #33 Not tainted\n[ 74.763216] --------------------------------------------\n[ 74.763672] event-sample-fn/1084 is trying to acquire lock:\n[ 74.764152] ffffffff86c9d6b0 (direct_mutex){+.+.}-{3:3}, at: \\\n register_ftrace_function+0x1f/0x180\n[ 74.764922]\n[ 74.764922] but task is already holding lock:\n[ 74.765421] ffffffff86c9d6b0 (direct_mutex){+.+.}-{3:3}, at: \\\n modify_ftrace_direct+0x34/0x1f0\n[ 74.766142]\n[ 74.766142] other info that might help us debug this:\n[ 74.766701] Possible unsafe locking scenario:\n[ 74.766701]\n[ 74.767216] CPU0\n[ 74.767437] ----\n[ 74.767656] lock(direct_mutex);\n[ 74.767952] lock(direct_mutex);\n[ 74.768245]\n[ 74.768245] *** DEADLOCK ***\n[ 74.768245]\n[ 74.768750] May be due to missing lock nesting notation\n[ 74.768750]\n[ 74.769332] 1 lock held by event-sample-fn/1084:\n[ 74.769731] #0: ffffffff86c9d6b0 (direct_mutex){+.+.}-{3:3}, at: \\\n modify_ftrace_direct+0x34/0x1f0\n[ 74.770496]\n[ 74.770496] stack backtrace:\n[ 74.770884] CPU: 4 PID: 1084 Comm: event-sample-fn Not tainted ...\n[ 74.771498] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), ...\n[ 74.772474] Call Trace:\n[ 74.772696] <TASK>\n[ 74.772896] dump_stack_lvl+0x44/0x5b\n[ 74.773223] __lock_acquire.cold.74+0xac/0x2b7\n[ 74.773616] lock_acquire+0xd2/0x310\n[ 74.773936] ? register_ftrace_function+0x1f/0x180\n[ 74.774357] ? lock_is_held_type+0xd8/0x130\n[ 74.774744] ? my_tramp2+0x11/0x11 [ftrace_direct_modify]\n[ 74.775213] __mutex_lock+0x99/0x1010\n[ 74.775536] ? register_ftrace_function+0x1f/0x180\n[ 74.775954] ? slab_free_freelist_hook.isra.43+0x115/0x160\n[ 74.776424] ? ftrace_set_hash+0x195/0x220\n[ 74.776779] ? register_ftrace_function+0x1f/0x180\n[ 74.777194] ? kfree+0x3e1/0x440\n[ 74.777482] ? my_tramp2+0x11/0x11 [ftrace_direct_modify]\n[ 74.777941] ? __schedule+0xb40/0xb40\n[ 74.778258] ? register_ftrace_function+0x1f/0x180\n[ 74.778672] ? my_tramp1+0xf/0xf [ftrace_direct_modify]\n[ 74.779128] register_ftrace_function+0x1f/0x180\n[ 74.779527] ? ftrace_set_filter_ip+0x33/0x70\n[ 74.779910] ? __schedule+0xb40/0xb40\n[ 74.780231] ? my_tramp1+0xf/0xf [ftrace_direct_modify]\n[ 74.780678] ? my_tramp2+0x11/0x11 [ftrace_direct_modify]\n[ 74.781147] ftrace_modify_direct_caller+0x5b/0x90\n[ 74.781563] ? 0xffffffffa0201000\n[ 74.781859] ? my_tramp1+0xf/0xf [ftrace_direct_modify]\n[ 74.782309] modify_ftrace_direct+0x1b2/0x1f0\n[ 74.782690] ? __schedule+0xb40/0xb40\n[ 74.783014] ? simple_thread+0x2a/0xb0 [ftrace_direct_modify]\n[ 74.783508] ? __schedule+0xb40/0xb40\n[ 74.783832] ? my_tramp2+0x11/0x11 [ftrace_direct_modify]\n[ 74.784294] simple_thread+0x76/0xb0 [ftrace_direct_modify]\n[ 74.784766] kthread+0xf5/0x120\n[ 74.785052] ? kthread_complete_and_exit+0x20/0x20\n[ 74.785464] ret_from_fork+0x22/0x30\n[ 74.785781] </TASK>\n\nFix this by using register_ftrace_function_nolock in\nftrace_modify_direct_caller."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/trace/ftrace.c"], "versions": [{"version": "53cd885bc5c3ea283cc9c00ca6446c778f00bfba", "lessThan": "2482eacb685b6500e158268befbe6c90de5f166a", "status": "affected", "versionType": "git"}, {"version": "53cd885bc5c3ea283cc9c00ca6446c778f00bfba", "lessThan": "9d2ce78ddcee159eb6a97449e9c68b6d60b9cec4", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["kernel/trace/ftrace.c"], "versions": [{"version": "6.0", "status": "affected"}, {"version": "0", "lessThan": "6.0", "status": "unaffected", "versionType": "semver"}, {"version": "6.0.3", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1", "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": "6.0", "versionEndExcluding": "6.0.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.0", "versionEndExcluding": "6.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/2482eacb685b6500e158268befbe6c90de5f166a"}, {"url": "https://git.kernel.org/stable/c/9d2ce78ddcee159eb6a97449e9c68b6d60b9cec4"}], "title": "ftrace: Fix recursive locking direct_mutex in ftrace_modify_direct_caller", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nftrace: Fix recursive locking direct_mutex in ftrace_modify_direct_caller\n\nNaveen reported recursive locking of direct_mutex with sample\nftrace-direct-modify.ko:\n\n[ 74.762406] WARNING: possible recursive locking detected\n[ 74.762887] 6.0.0-rc6+ #33 Not tainted\n[ 74.763216] --------------------------------------------\n[ 74.763672] event-sample-fn/1084 is trying to acquire lock:\n[ 74.764152] ffffffff86c9d6b0 (direct_mutex){+.+.}-{3:3}, at: \\\n register_ftrace_function+0x1f/0x180\n[ 74.764922]\n[ 74.764922] but task is already holding lock:\n[ 74.765421] ffffffff86c9d6b0 (direct_mutex){+.+.}-{3:3}, at: \\\n modify_ftrace_direct+0x34/0x1f0\n[ 74.766142]\n[ 74.766142] other info that might help us debug this:\n[ 74.766701] Possible unsafe locking scenario:\n[ 74.766701]\n[ 74.767216] CPU0\n[ 74.767437] ----\n[ 74.767656] lock(direct_mutex);\n[ 74.767952] lock(direct_mutex);\n[ 74.768245]\n[ 74.768245] *** DEADLOCK ***\n[ 74.768245]\n[ 74.768750] May be due to missing lock nesting notation\n[ 74.768750]\n[ 74.769332] 1 lock held by event-sample-fn/1084:\n[ 74.769731] #0: ffffffff86c9d6b0 (direct_mutex){+.+.}-{3:3}, at: \\\n modify_ftrace_direct+0x34/0x1f0\n[ 74.770496]\n[ 74.770496] stack backtrace:\n[ 74.770884] CPU: 4 PID: 1084 Comm: event-sample-fn Not tainted ...\n[ 74.771498] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), ...\n[ 74.772474] Call Trace:\n[ 74.772696] <TASK>\n[ 74.772896] dump_stack_lvl+0x44/0x5b\n[ 74.773223] __lock_acquire.cold.74+0xac/0x2b7\n[ 74.773616] lock_acquire+0xd2/0x310\n[ 74.773936] ? register_ftrace_function+0x1f/0x180\n[ 74.774357] ? lock_is_held_type+0xd8/0x130\n[ 74.774744] ? my_tramp2+0x11/0x11 [ftrace_direct_modify]\n[ 74.775213] __mutex_lock+0x99/0x1010\n[ 74.775536] ? register_ftrace_function+0x1f/0x180\n[ 74.775954] ? slab_free_freelist_hook.isra.43+0x115/0x160\n[ 74.776424] ? ftrace_set_hash+0x195/0x220\n[ 74.776779] ? register_ftrace_function+0x1f/0x180\n[ 74.777194] ? kfree+0x3e1/0x440\n[ 74.777482] ? my_tramp2+0x11/0x11 [ftrace_direct_modify]\n[ 74.777941] ? __schedule+0xb40/0xb40\n[ 74.778258] ? register_ftrace_function+0x1f/0x180\n[ 74.778672] ? my_tramp1+0xf/0xf [ftrace_direct_modify]\n[ 74.779128] register_ftrace_function+0x1f/0x180\n[ 74.779527] ? ftrace_set_filter_ip+0x33/0x70\n[ 74.779910] ? __schedule+0xb40/0xb40\n[ 74.780231] ? my_tramp1+0xf/0xf [ftrace_direct_modify]\n[ 74.780678] ? my_tramp2+0x11/0x11 [ftrace_direct_modify]\n[ 74.781147] ftrace_modify_direct_caller+0x5b/0x90\n[ 74.781563] ? 0xffffffffa0201000\n[ 74.781859] ? my_tramp1+0xf/0xf [ftrace_direct_modify]\n[ 74.782309] modify_ftrace_direct+0x1b2/0x1f0\n[ 74.782690] ? __schedule+0xb40/0xb40\n[ 74.783014] ? simple_thread+0x2a/0xb0 [ftrace_direct_modify]\n[ 74.783508] ? __schedule+0xb40/0xb40\n[ 74.783832] ? my_tramp2+0x11/0x11 [ftrace_direct_modify]\n[ 74.784294] simple_thread+0x76/0xb0 [ftrace_direct_modify]\n[ 74.784766] kthread+0xf5/0x120\n[ 74.785052] ? kthread_complete_and_exit+0x20/0x20\n[ 74.785464] ret_from_fork+0x22/0x30\n[ 74.785781] </TASK>\n\nFix this by using register_ftrace_function_nolock in\nftrace_modify_direct_caller."}], "id": "CVE-2022-50648", "lastModified": "2025-12-09T18:37:13.640", "metrics": {}, "published": "2025-12-09T01:16:47.490", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2482eacb685b6500e158268befbe6c90de5f166a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9d2ce78ddcee159eb6a97449e9c68b6d60b9cec4"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: ftrace: Fix recursive locking direct_mutex in ftrace_modify_direct_caller", "id": "2420243", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2420243"}, "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"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nftrace: Fix recursive locking direct_mutex in ftrace_modify_direct_caller\nNaveen reported recursive locking of direct_mutex with sample\nftrace-direct-modify.ko:\n[ 74.762406] WARNING: possible recursive locking detected\n[ 74.762887] 6.0.0-rc6+ #33 Not tainted\n[ 74.763216] --------------------------------------------\n[ 74.763672] event-sample-fn/1084 is trying to acquire lock:\n[ 74.764152] ffffffff86c9d6b0 (direct_mutex){+.+.}-{3:3}, at: \\\nregister_ftrace_function+0x1f/0x180\n[ 74.764922]\n[ 74.764922] but task is already holding lock:\n[ 74.765421] ffffffff86c9d6b0 (direct_mutex){+.+.}-{3:3}, at: \\\nmodify_ftrace_direct+0x34/0x1f0\n[ 74.766142]\n[ 74.766142] other info that might help us debug this:\n[ 74.766701] Possible unsafe locking scenario:\n[ 74.766701]\n[ 74.767216] CPU0\n[ 74.767437] ----\n[ 74.767656] lock(direct_mutex);\n[ 74.767952] lock(direct_mutex);\n[ 74.768245]\n[ 74.768245] *** DEADLOCK ***\n[ 74.768245]\n[ 74.768750] May be due to missing lock nesting notation\n[ 74.768750]\n[ 74.769332] 1 lock held by event-sample-fn/1084:\n[ 74.769731] #0: ffffffff86c9d6b0 (direct_mutex){+.+.}-{3:3}, at: \\\nmodify_ftrace_direct+0x34/0x1f0\n[ 74.770496]\n[ 74.770496] stack backtrace:\n[ 74.770884] CPU: 4 PID: 1084 Comm: event-sample-fn Not tainted ...\n[ 74.771498] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), ...\n[ 74.772474] Call Trace:\n[ 74.772696] <TASK>\n[ 74.772896] dump_stack_lvl+0x44/0x5b\n[ 74.773223] __lock_acquire.cold.74+0xac/0x2b7\n[ 74.773616] lock_acquire+0xd2/0x310\n[ 74.773936] ? register_ftrace_function+0x1f/0x180\n[ 74.774357] ? lock_is_held_type+0xd8/0x130\n[ 74.774744] ? my_tramp2+0x11/0x11 [ftrace_direct_modify]\n[ 74.775213] __mutex_lock+0x99/0x1010\n[ 74.775536] ? register_ftrace_function+0x1f/0x180\n[ 74.775954] ? slab_free_freelist_hook.isra.43+0x115/0x160\n[ 74.776424] ? ftrace_set_hash+0x195/0x220\n[ 74.776779] ? register_ftrace_function+0x1f/0x180\n[ 74.777194] ? kfree+0x3e1/0x440\n[ 74.777482] ? my_tramp2+0x11/0x11 [ftrace_direct_modify]\n[ 74.777941] ? __schedule+0xb40/0xb40\n[ 74.778258] ? register_ftrace_function+0x1f/0x180\n[ 74.778672] ? my_tramp1+0xf/0xf [ftrace_direct_modify]\n[ 74.779128] register_ftrace_function+0x1f/0x180\n[ 74.779527] ? ftrace_set_filter_ip+0x33/0x70\n[ 74.779910] ? __schedule+0xb40/0xb40\n[ 74.780231] ? my_tramp1+0xf/0xf [ftrace_direct_modify]\n[ 74.780678] ? my_tramp2+0x11/0x11 [ftrace_direct_modify]\n[ 74.781147] ftrace_modify_direct_caller+0x5b/0x90\n[ 74.781563] ? 0xffffffffa0201000\n[ 74.781859] ? my_tramp1+0xf/0xf [ftrace_direct_modify]\n[ 74.782309] modify_ftrace_direct+0x1b2/0x1f0\n[ 74.782690] ? __schedule+0xb40/0xb40\n[ 74.783014] ? simple_thread+0x2a/0xb0 [ftrace_direct_modify]\n[ 74.783508] ? __schedule+0xb40/0xb40\n[ 74.783832] ? my_tramp2+0x11/0x11 [ftrace_direct_modify]\n[ 74.784294] simple_thread+0x76/0xb0 [ftrace_direct_modify]\n[ 74.784766] kthread+0xf5/0x120\n[ 74.785052] ? kthread_complete_and_exit+0x20/0x20\n[ 74.785464] ret_from_fork+0x22/0x30\n[ 74.785781] </TASK>\nFix this by using register_ftrace_function_nolock in\nftrace_modify_direct_caller."], "name": "CVE-2022-50648", "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": "Out of support scope", "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": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-12-09T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50648\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50648\nhttps://lore.kernel.org/linux-cve-announce/2025120937-CVE-2022-50648-ac1e@gregkh/T"], "threat_severity": "Low"}