Entreprise française de cybersécurité depuis 2004
☎ 03 60 47 09 81 - info@securiteinfo.com
☎ 03 60 47 09 81 - info@securiteinfo.com
In the Linux kernel, the following vulnerability has been resolved:hwmon: Handle failure to register sensor with thermal zone correctlyIf an attempt is made to a sensor with a thermal zone and it fails,the call to devm_thermal_zone_of_sensor_register() may return -ENODEV.This may result in crashes similar to the following.Unable to handle kernel NULL pointer dereference at virtual address 00000000000003cd...Internal error: Oops: 96000021 [#1] PREEMPT SMP...pstate: 60400009 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)pc : mutex_lock+0x18/0x60lr : thermal_zone_device_update+0x40/0x2e0sp : ffff800014c4fc60x29: ffff800014c4fc60 x28: ffff365ee3f6e000 x27: ffffdde218426790x26: ffff365ee3f6e000 x25: 0000000000000000 x24: ffff365ee3f6e000x23: ffffdde218426870 x22: ffff365ee3f6e000 x21: 00000000000003cdx20: ffff365ee8bf3308 x19: ffffffffffffffed x18: 0000000000000000x17: ffffdde21842689c x16: ffffdde1cb7a0b7c x15: 0000000000000040x14: ffffdde21a4889a0 x13: 0000000000000228 x12: 0000000000000000x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000x8 : 0000000001120000 x7 : 0000000000000001 x6 : 0000000000000000x5 : 0068000878e20f07 x4 : 0000000000000000 x3 : 00000000000003cdx2 : ffff365ee3f6e000 x1 : 0000000000000000 x0 : 00000000000003cdCall trace: mutex_lock+0x18/0x60 hwmon_notify_event+0xfc/0x110 0xffffdde1cb7a0a90 0xffffdde1cb7a0b7c irq_thread_fn+0x2c/0xa0 irq_thread+0x134/0x240 kthread+0x178/0x190 ret_from_fork+0x10/0x20Code: d503201f d503201f d2800001 aa0103e4 (c8e47c02)Jon Hunter reports that the exact call sequence is:hwmon_notify_event() --> hwmon_thermal_notify() --> thermal_zone_device_update() --> update_temperature() --> mutex_lock()The hwmon core needs to handle all errors returned from callsto devm_thermal_zone_of_sensor_register(). If the call failswith -ENODEV, report that the sensor was not attached to athermal zone but continue to register the hwmon device.
No PoCs from references.
- https://github.com/ARPSyndicate/cve-scores