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    <link>https://vulnerability.circl.lu</link>
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    <lastBuildDate>Fri, 02 Oct 2026 14:05:22 +0000</lastBuildDate>
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      <title>CVE-2022-49460 — PM / devfreq: rk3399_dmc: Disable edev on remove()</title>
      <link>https://vulnerability.circl.lu/vuln/cve-2022-49460</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;PM / devfreq: rk3399_dmc: Disable edev on remove()&lt;/p&gt;
&lt;p&gt;Otherwise we hit an unablanced enable-count when unbinding the DFI
device:&lt;/p&gt;
&lt;p&gt;[ 1279.659119] ------------[ cut here ]------------
[ 1279.659179] WARNING: CPU: 2 PID: 5638 at drivers/devfreq/devfreq-event.c:360 devfreq_event_remove_edev+0x84/0x8c
...
[ 1279.659352] Hardware name: Google Kevin (DT)
[ 1279.659363] pstate: 80400005 (Nzcv daif +PAN -UAO -TCO BTYPE=--)
[ 1279.659371] pc : devfreq_event_remove_edev+0x84/0x8c
[ 1279.659380] lr : devm_devfreq_event_release+0x1c/0x28
...
[ 1279.659571] Call trace:
[ 1279.659582]  devfreq_event_remove_edev+0x84/0x8c
[ 1279.659590]  devm_devfreq_event_release+0x1c/0x28
[ 1279.659602]  release_nodes+0x1cc/0x244
[ 1279.659611]  devres_release_all+0x44/0x60
[ 1279.659621]  device_release_driver_internal+0x11c/0x1ac
[ 1279.659629]  device_driver_detach+0x20/0x2c
[ 1279.659641]  unbind_store+0x7c/0xb0
[ 1279.659650]  drv_attr_store+0x2c/0x40
[ 1279.659663]  sysfs_kf_write+0x44/0x58
[ 1279.659672]  kernfs_fop_write_iter+0xf4/0x190
[ 1279.659684]  vfs_write+0x2b0/0x2e4
[ 1279.659693]  ksys_write+0x80/0xec
[ 1279.659701]  __arm64_sys_write+0x24/0x30
[ 1279.659714]  el0_svc_common+0xf0/0x1d8
[ 1279.659724]  do_el0_svc_compat+0x28/0x3c
[ 1279.659738]  el0_svc_compat+0x10/0x1c
[ 1279.659746]  el0_sync_compat_handler+0xa8/0xcc
[ 1279.659758]  el0_sync_compat+0x188/0x1c0
[ 1279.659768] ---[ end trace cec200e5094155b4 ]---&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; Linux&lt;/p&gt;
&lt;p&gt;In the Linux kernel, the following vulnerability has been resolved:&lt;/p&gt;
&lt;p&gt;PM / devfreq: rk3399_dmc: Disable edev on remove()&lt;/p&gt;
&lt;p&gt;Otherwise we hit an unablanced enable-count when unbinding the DFI
device:&lt;/p&gt;
&lt;p&gt;[ 1279.659119] ------------[ cut here ]------------
[ 1279.659179] WARNING: CPU: 2 PID: 5638 at drivers/devfreq/devfreq-event.c:360 devfreq_event_remove_edev+0x84/0x8c
...
[ 1279.659352] Hardware name: Google Kevin (DT)
[ 1279.659363] pstate: 80400005 (Nzcv daif +PAN -UAO -TCO BTYPE=--)
[ 1279.659371] pc : devfreq_event_remove_edev+0x84/0x8c
[ 1279.659380] lr : devm_devfreq_event_release+0x1c/0x28
...
[ 1279.659571] Call trace:
[ 1279.659582]  devfreq_event_remove_edev+0x84/0x8c
[ 1279.659590]  devm_devfreq_event_release+0x1c/0x28
[ 1279.659602]  release_nodes+0x1cc/0x244
[ 1279.659611]  devres_release_all+0x44/0x60
[ 1279.659621]  device_release_driver_internal+0x11c/0x1ac
[ 1279.659629]  device_driver_detach+0x20/0x2c
[ 1279.659641]  unbind_store+0x7c/0xb0
[ 1279.659650]  drv_attr_store+0x2c/0x40
[ 1279.659663]  sysfs_kf_write+0x44/0x58
[ 1279.659672]  kernfs_fop_write_iter+0xf4/0x190
[ 1279.659684]  vfs_write+0x2b0/0x2e4
[ 1279.659693]  ksys_write+0x80/0xec
[ 1279.659701]  __arm64_sys_write+0x24/0x30
[ 1279.659714]  el0_svc_common+0xf0/0x1d8
[ 1279.659724]  do_el0_svc_compat+0x28/0x3c
[ 1279.659738]  el0_svc_compat+0x10/0x1c
[ 1279.659746]  el0_sync_compat_handler+0xa8/0xcc
[ 1279.659758]  el0_sync_compat+0x188/0x1c0
[ 1279.659768] ---[ end trace cec200e5094155b4 ]---&lt;/p&gt;</content:encoded>
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