CVE-2021-47384
In the Linux kernel, the following vulnerability has been resolved: hwmon: (w83793) Fix NULL pointer dereference by removing unnecessary structure field If driver read tmp value sufficient for (tmp & 0x08) && (!(tmp & 0x80)) && ((tmp & 0x7) == ((tmp >>…
Does this matter?
Lower severity and a low EPSS score (1.03%). Track it; it rarely justifies an emergency change on its own.
Description
In the Linux kernel, the following vulnerability has been resolved: hwmon: (w83793) Fix NULL pointer dereference by removing unnecessary structure field If driver read tmp value sufficient for (tmp & 0x08) && (!(tmp & 0x80)) && ((tmp & 0x7) == ((tmp >> 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 multi-line alignments]
- CVSS 3.1
- 5.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
- EPSS
- 1.03% probability · 62th 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/6cb01fe630eaffc5a2c3f7364436caddba286623Patch
- https://git.kernel.org/stable/c/746011193f44f97f8784edcf8327c587946745fcPatch
- https://git.kernel.org/stable/c/7c4fd5de39f273626a2b0f3a446d2cc85cd47616Patch
- https://git.kernel.org/stable/c/dd4d747ef05addab887dc8ff0d6ab9860bbcd783Patch
- https://git.kernel.org/stable/c/6cb01fe630eaffc5a2c3f7364436caddba286623Patch
- https://git.kernel.org/stable/c/746011193f44f97f8784edcf8327c587946745fcPatch
- https://git.kernel.org/stable/c/7c4fd5de39f273626a2b0f3a446d2cc85cd47616Patch
- https://git.kernel.org/stable/c/dd4d747ef05addab887dc8ff0d6ab9860bbcd783Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.