CVE-2021-47605
In the Linux kernel, the following vulnerability has been resolved: vduse: fix memory corruption in vduse_dev_ioctl() The "config.offset" comes from the user.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.21%). 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: vduse: fix memory corruption in vduse_dev_ioctl() The "config.offset" comes from the user. There needs to a check to prevent it being out of bounds. The "config.offset" and "dev->config_size" variables are both type u32. So if the offset if out of bounds then the "dev->config_size - config.offset" subtraction results in a very high u32 value. The out of bounds offset can result in memory corruption.
- 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
- 0.21% probability · 12th 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/e6c67560b4341914bec32ec536e931c22062af65Patch
- https://git.kernel.org/stable/c/ff9f9c6e74848170fcb45c8403c80d661484c8c9Patch
- https://git.kernel.org/stable/c/e6c67560b4341914bec32ec536e931c22062af65Patch
- https://git.kernel.org/stable/c/ff9f9c6e74848170fcb45c8403c80d661484c8c9Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.