In the Linux kernel, the following vulnerability has been resolved:
vduse: check that offset is within bounds in get_config()
This condition checks “len” but it does not check “offset” and that
could result in an out of bounds read if “offset > dev->config_size”.
The problem is that since both variables are unsigned the
“dev->config_size - offset” subtraction would result in a very high
unsigned value.
I think these checks might not be necessary because “len” and “offset”
are supposed to already have been validated using the
vhost_vdpa_config_validate() function. But I do not know the code
perfectly, and I like to be safe.
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
ubuntu | 18.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 22.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 23.10 | noarch | linux | < any | UNKNOWN |
ubuntu | 24.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 14.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 16.04 | noarch | linux | < any | UNKNOWN |
ubuntu | 18.04 | noarch | linux-aws | < any | UNKNOWN |
ubuntu | 20.04 | noarch | linux-aws | < any | UNKNOWN |
ubuntu | 22.04 | noarch | linux-aws | < any | UNKNOWN |
git.kernel.org/linus/dc1db0060c02d119fd4196924eff2d1129e9a442 (5.16-rc6)
git.kernel.org/stable/c/dc1db0060c02d119fd4196924eff2d1129e9a442
git.kernel.org/stable/c/ebbbc5fea3f648175df1aa3f127c78eb0252cc2a
launchpad.net/bugs/cve/CVE-2021-47604
nvd.nist.gov/vuln/detail/CVE-2021-47604
security-tracker.debian.org/tracker/CVE-2021-47604
www.cve.org/CVERecord?id=CVE-2021-47604