Total vulnerabilities in the database
In the Linux kernel, the following vulnerability has been resolved:
quota: Fix potential NULL pointer dereference
Below race may cause NULL pointer dereference
P1 P2 dquot_free_inode quota_off drop_dquot_ref remove_dquot_ref dquots = i_dquot(inode) dquots = i_dquot(inode) srcu_read_lock dquots[cnt]) != NULL (1) dquots[type] = NULL (2) spin_lock(&dquots[cnt]->dq_dqb_lock) (3) ....
If dquot_free_inode(or other routines) checks inode's quota pointers (1) before quota_off sets it to NULL(2) and use it (3) after that, NULL pointer dereference will be triggered.
So let's fix it by using a temporary pointer to avoid this issue.
| Software | From | Fixed in |
|---|---|---|
| linux / linux_kernel | 6.7 | 6.7.11 |
| linux / linux_kernel | 6.2 | 6.6.23 |
| linux / linux_kernel | 5.16 | 6.1.83 |
| linux / linux_kernel | 5.11 | 5.15.153 |
| linux / linux_kernel | 5.5 | 5.10.214 |
| linux / linux_kernel | 4.20 | 5.4.273 |
| linux / linux_kernel | - | 4.19.311 |
| linux / linux_kernel | 6.8 | 6.8.2 |
| debian / debian_linux | 10.0 | 10.0.x |