CVE-2022-49010
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.
Does this matter?
Lower severity and a low EPSS score (0.24%). Track it; it rarely justifies an emergency change on its own.
Description
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.24% probability · 15th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/070d5ea4a0592a37ad96ce7f7b6b024f90bb009fPatch
- https://git.kernel.org/stable/c/280110db1a7d62ad635b103bafc3ae96e8bef75cPatch
- https://git.kernel.org/stable/c/7692700ac818866d138a8de555130a6e70e6ac16Patch
- https://git.kernel.org/stable/c/89eecabe6a47403237f45aafd7d24f93cb973653Patch
- https://git.kernel.org/stable/c/a89ff5f5cc64b9fe7a992cf56988fd36f56ca82aPatch
- https://git.kernel.org/stable/c/ae6c8b6e5d5628df1c475c0a8fca1465e205c95bPatch
- https://git.kernel.org/stable/c/f06e0cd01eab954bd5f2190c9faa79bb5357e05bPatch
- https://git.kernel.org/stable/c/fb503d077ff7b43913503eaf72995d1239028b99Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.