5.5

CVE-2022-49010

hwmon: (coretemp) Check for null before removing sysfs attrs

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

hwmon: (coretemp) Check for null before removing sysfs attrs

If coretemp_add_core() gets an error then pdata->core_data[indx]
is already NULL and has been kfreed. Don't pass that to
sysfs_remove_group() as that will crash in sysfs_remove_group().

[Shortened for readability]
[91854.020159] sysfs: cannot create duplicate filename '/devices/platform/coretemp.0/hwmon/hwmon2/temp20_label'
<cpu offline>
[91855.126115] BUG: kernel NULL pointer dereference, address: 0000000000000188
[91855.165103] #PF: supervisor read access in kernel mode
[91855.194506] #PF: error_code(0x0000) - not-present page
[91855.224445] PGD 0 P4D 0
[91855.238508] Oops: 0000 [#1] PREEMPT SMP PTI
...
[91855.342716] RIP: 0010:sysfs_remove_group+0xc/0x80
...
[91855.796571] Call Trace:
[91855.810524]  coretemp_cpu_offline+0x12b/0x1dd [coretemp]
[91855.841738]  ? coretemp_cpu_online+0x180/0x180 [coretemp]
[91855.871107]  cpuhp_invoke_callback+0x105/0x4b0
[91855.893432]  cpuhp_thread_fun+0x8e/0x150
...

Fix this by checking for NULL first.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 3.0 < 4.9.335
Linux ≫ Linux Kernel Version >= 4.10 < 4.14.301
Linux ≫ Linux Kernel Version >= 4.15 < 4.19.268
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.226
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.158
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.82
Linux ≫ Linux Kernel Version >= 5.16 < 6.0.12
Linux ≫ Linux Kernel Version 6.1 Update rc1
Linux ≫ Linux Kernel Version 6.1 Update rc2
Linux ≫ Linux Kernel Version 6.1 Update rc3
Linux ≫ Linux Kernel Version 6.1 Update rc4
Linux ≫ Linux Kernel Version 6.1 Update rc5
Linux ≫ Linux Kernel Version 6.1 Update rc6
Linux ≫ Linux Kernel Version 6.1 Update rc7
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.24% 0.147
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 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-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.

https://git.kernel.org/stable/c/070d5ea4a0592a37ad96ce7f7b6b024f90bb009f
Patch
https://git.kernel.org/stable/c/280110db1a7d62ad635b103bafc3ae96e8bef75c
Patch
https://git.kernel.org/stable/c/7692700ac818866d138a8de555130a6e70e6ac16
Patch
https://git.kernel.org/stable/c/89eecabe6a47403237f45aafd7d24f93cb973653
Patch
https://git.kernel.org/stable/c/a89ff5f5cc64b9fe7a992cf56988fd36f56ca82a
Patch
https://git.kernel.org/stable/c/ae6c8b6e5d5628df1c475c0a8fca1465e205c95b
Patch
https://git.kernel.org/stable/c/f06e0cd01eab954bd5f2190c9faa79bb5357e05b
Patch
https://git.kernel.org/stable/c/fb503d077ff7b43913503eaf72995d1239028b99
Patch