CVE-2021-47286
In the Linux kernel, the following vulnerability has been resolved: bus: mhi: core: Validate channel ID when processing command completions MHI reads the channel ID from the event ring element sent by the device which can be any value between 0 and 255.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.23%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
In the Linux kernel, the following vulnerability has been resolved: bus: mhi: core: Validate channel ID when processing command completions MHI reads the channel ID from the event ring element sent by the device which can be any value between 0 and 255. In order to prevent any out of bound accesses, add a check against the maximum number of channels supported by the controller and those channels not configured yet so as to skip processing of that event ring element.
- CVSS 3.1
- 7.8 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 0.23% probability · 14th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/3efec3b4b16fc7af25676a94230a8ab2a3bb867cPatch
- https://git.kernel.org/stable/c/546362a9ef2ef40b57c6605f14e88ced507f8dd0Patch
- https://git.kernel.org/stable/c/aed4f5b51aba41e2afd7cfda20a0571a6a67dfe9Patch
- https://git.kernel.org/stable/c/3efec3b4b16fc7af25676a94230a8ab2a3bb867cPatch
- https://git.kernel.org/stable/c/546362a9ef2ef40b57c6605f14e88ced507f8dd0Patch
- https://git.kernel.org/stable/c/aed4f5b51aba41e2afd7cfda20a0571a6a67dfe9Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.