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        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
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        "summary": "Canonical URL",
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          "date": "2022-01-01T00:00:00Z",
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          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\ncpufreq: governor: Use kobject release() method to free dbs_data\n\nThe struct dbs_data embeds a struct gov_attr_set and\nthe struct gov_attr_set embeds a kobject. Since every kobject must have\na release() method and we can't use kfree() to free it directly,\nso introduce cpufreq_dbs_data_release() to release the dbs_data via\nthe kobject::release() method. This fixes the calltrace like below:\n\n  ODEBUG: free active (active state 0) object type: timer_list hint: delayed_work_timer_fn+0x0/0x34\n  WARNING: CPU: 12 PID: 810 at lib/debugobjects.c:505 debug_print_object+0xb8/0x100\n  Modules linked in:\n  CPU: 12 PID: 810 Comm: sh Not tainted 5.16.0-next-20220120-yocto-standard+ #536\n  Hardware name: Marvell OcteonTX CN96XX board (DT)\n  pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n  pc : debug_print_object+0xb8/0x100\n  lr : debug_print_object+0xb8/0x100\n  sp : ffff80001dfcf9a0\n  x29: ffff80001dfcf9a0 x28: 0000000000000001 x27: ffff0001464f0000\n  x26: 0000000000000000 x25: ffff8000090e3f00 x24: ffff80000af60210\n  x23: ffff8000094dfb78 x22: ffff8000090e3f00 x21: ffff0001080b7118\n  x20: ffff80000aeb2430 x19: ffff800009e8f5e0 x18: 0000000000000000\n  x17: 0000000000000002 x16: 00004d62e58be040 x15: 013590470523aff8\n  x14: ffff8000090e1828 x13: 0000000001359047 x12: 00000000f5257d14\n  x11: 0000000000040591 x10: 0000000066c1ffea x9 : ffff8000080d15e0\n  x8 : ffff80000a1765a8 x7 : 0000000000000000 x6 : 0000000000000001\n  x5 : ffff800009e8c000 x4 : ffff800009e8c760 x3 : 0000000000000000\n  x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0001474ed040\n  Call trace:\n   debug_print_object+0xb8/0x100\n   __debug_check_no_obj_freed+0x1d0/0x25c\n   debug_check_no_obj_freed+0x24/0xa0\n   kfree+0x11c/0x440\n   cpufreq_dbs_governor_exit+0xa8/0xac\n   cpufreq_exit_governor+0x44/0x90\n   cpufreq_set_policy+0x29c/0x570\n   store_scaling_governor+0x110/0x154\n   store+0xb0/0xe0\n   sysfs_kf_write+0x58/0x84\n   kernfs_fop_write_iter+0x12c/0x1c0\n   new_sync_write+0xf0/0x18c\n   vfs_write+0x1cc/0x220\n   ksys_write+0x74/0x100\n   __arm64_sys_write+0x28/0x3c\n   invoke_syscall.constprop.0+0x58/0xf0\n   do_el0_svc+0x70/0x170\n   el0_svc+0x54/0x190\n   el0t_64_sync_handler+0xa4/0x130\n   el0t_64_sync+0x1a0/0x1a4\n  irq event stamp: 189006\n  hardirqs last  enabled at (189005): [<ffff8000080849d0>] finish_task_switch.isra.0+0xe0/0x2c0\n  hardirqs last disabled at (189006): [<ffff8000090667a4>] el1_dbg+0x24/0xa0\n  softirqs last  enabled at (188966): [<ffff8000080106d0>] __do_softirq+0x4b0/0x6a0\n  softirqs last disabled at (188957): [<ffff80000804a618>] __irq_exit_rcu+0x108/0x1a4\n\n[ rjw: Because can be freed by the gov_attr_set_put() in\n  cpufreq_dbs_governor_exit() now, it is also necessary to put the\n  invocation of the governor ->exit() callback into the new\n  cpufreq_dbs_data_release() function. ]",
          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
        "known_affected": [
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        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els/cve/CVE-2022-49513"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/1e32083f327184b6226ce320ef30085ce785ea4e",
          "url": "https://git.kernel.org/stable/c/1e32083f327184b6226ce320ef30085ce785ea4e"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/a1964688582d26af1328e19b658933659fb54337",
          "url": "https://git.kernel.org/stable/c/a1964688582d26af1328e19b658933659fb54337"
        },
        {
          "category": "external",
          "summary": "https://git.kernel.org/stable/c/a85ee6401a47ae3fc64ba506cacb3e7873823c65",
          "url": "https://git.kernel.org/stable/c/a85ee6401a47ae3fc64ba506cacb3e7873823c65"
        }
      ],
      "release_date": "2025-02-26T07:01:00Z",
      "remediations": [
        {
          "category": "no_fix_planned",
          "date": "2026-08-01T12:56:55.175503Z",
          "details": "CVE-2022-49513 is confined to the cpufreq governor teardown/switching path and requires a local user with administrative ability to write cpufreq sysfs attributes, so it is not remotely exploitable. Its effect is limited to availability (e.g., warnings or a possible kernel panic) with no confidentiality or integrity impact, and it has been fixed in maintained upstream LTS kernels for a long time. In enterprise VM and server deployments where hypervisors commonly abstract or disable CPU frequency scaling, the affected cpufreq governor path is typically not active, making real‑world exploitation unlikely.",
          "product_ids": [
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      ],
      "scores": [
        {
          "cvss_v3": {
            "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"
          },
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      "threats": [
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  ]
}