CVE-2021-47385
In the Linux kernel, the following vulnerability has been resolved: hwmon: (w83792d) Fix NULL pointer dereference by removing unnecessary structure field If driver read val value sufficient for (val & 0x08) && (!(val & 0x80)) && ((val & 0x7) == ((val >>…
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: (w83792d) Fix NULL pointer dereference by removing unnecessary structure field If driver read val value sufficient for (val & 0x08) && (!(val & 0x80)) && ((val & 0x7) == ((val >> 4) & 0x7)) from device then Null pointer dereference occurs. (It is possible if tmp = 0b0xyz1xyz, where same literals mean same numbers) Also lm75[] does not serve a purpose anymore after switching to devm_i2c_new_dummy_device() in w83791d_detect_subclients(). The patch fixes possible NULL pointer dereference by removing lm75[]. Found by Linux Driver Verification project (linuxtesting.org). [groeck: Dropped unnecessary continuation lines, fixed multipline alignment]
- 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/0f36b88173f028e372668ae040ab1a496834d278Patch
- https://git.kernel.org/stable/c/1499bb2c3a87a2efea0065adab2bd66badee61c3Patch
- https://git.kernel.org/stable/c/200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1Patch
- https://git.kernel.org/stable/c/24af1fe376e22c42238a4a604d31e46c486876c3Patch
- https://git.kernel.org/stable/c/0f36b88173f028e372668ae040ab1a496834d278Patch
- https://git.kernel.org/stable/c/1499bb2c3a87a2efea0065adab2bd66badee61c3Patch
- https://git.kernel.org/stable/c/200ced5ba724d8bbf29dfac4ed1e17a39ccaccd1Patch
- https://git.kernel.org/stable/c/24af1fe376e22c42238a4a604d31e46c486876c3Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.