In the Linux kernel, the following vulnerability has been resolved:
rtnetlink: Correct nested IFLA_VF_VLAN_LIST attribute validation
Each attribute inside a nested IFLA_VF_VLAN_LIST is assumed to be a struct ifla_vf_vlan_info so the size of such attribute needs to be at least of sizeof(struct ifla_vf_vlan_info) which is 14 bytes. The current size validation in do_setvfinfo is against NLA_HDRLEN (4 bytes) which is less than sizeof(struct ifla_vf_vlan_info) so this validation is not enough and a too small attribute might be cast to a struct ifla_vf_vlan_info, this might result in an out of bands read access when accessing the saved (casted) entry in ivvl.
| Software | From | Fixed in |
|---|---|---|
| linux / linux_kernel | 4.9 | 4.19.314 |
| linux / linux_kernel | 4.20 | 5.4.276 |
| linux / linux_kernel | 5.5 | 5.10.217 |
| linux / linux_kernel | 5.11 | 5.15.159 |
| linux / linux_kernel | 5.16 | 6.1.91 |
| linux / linux_kernel | 6.2 | 6.6.31 |
| linux / linux_kernel | 6.7 | 6.8.10 |
| linux / linux_kernel | 6.9-rc1 | 6.9-rc1.x |
| linux / linux_kernel | 6.9-rc2 | 6.9-rc2.x |
| linux / linux_kernel | 6.9-rc3 | 6.9-rc3.x |
| linux / linux_kernel | 6.9-rc4 | 6.9-rc4.x |
| linux / linux_kernel | 6.9-rc5 | 6.9-rc5.x |
| linux / linux_kernel | 6.9-rc6 | 6.9-rc6.x |
| linux / linux_kernel | 6.9-rc7 | 6.9-rc7.x |
| debian / debian_linux | 10.0 | 10.0.x |