5.5

CVE-2022-49468

In the Linux kernel, the following vulnerability has been resolved:

thermal/core: Fix memory leak in __thermal_cooling_device_register()

I got memory leak as follows when doing fault injection test:

unreferenced object 0xffff888010080000 (size 264312):
  comm "182", pid 102533, jiffies 4296434960 (age 10.100s)
  hex dump (first 32 bytes):
    00 00 00 00 ad 4e ad de ff ff ff ff 00 00 00 00  .....N..........
    ff ff ff ff ff ff ff ff 40 7f 1f b9 ff ff ff ff  ........@.......
  backtrace:
    [<0000000038b2f4fc>] kmalloc_order_trace+0x1d/0x110 mm/slab_common.c:969
    [<00000000ebcb8da5>] __kmalloc+0x373/0x420 include/linux/slab.h:510
    [<0000000084137f13>] thermal_cooling_device_setup_sysfs+0x15d/0x2d0 include/linux/slab.h:586
    [<00000000352b8755>] __thermal_cooling_device_register+0x332/0xa60 drivers/thermal/thermal_core.c:927
    [<00000000fb9f331b>] devm_thermal_of_cooling_device_register+0x6b/0xf0 drivers/thermal/thermal_core.c:1041
    [<000000009b8012d2>] max6650_probe.cold+0x557/0x6aa drivers/hwmon/max6650.c:211
    [<00000000da0b7e04>] i2c_device_probe+0x472/0xac0 drivers/i2c/i2c-core-base.c:561

If device_register() fails, thermal_cooling_device_destroy_sysfs() need be called
to free the memory allocated in thermal_cooling_device_setup_sysfs().
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Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.14 < 5.10.121
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.46
Linux ≫ Linux Kernel Version >= 5.16 < 5.17.14
Linux ≫ Linux Kernel Version >= 5.18 < 5.18.3
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.03% 0.09
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
134c704f-9b21-4f2e-91b3-4a467353bcc0 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-401 Missing Release of Memory after Effective Lifetime

The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory.