Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: staging: media: tegra-video: fix device_node use after free At probe time this code path is followed: * tegra_csi_init * tegra_csi_channels_alloc * for_each_child_of_node(node, channel) -- iterates over channels * automatically gets 'channel' * tegra_csi_channel_alloc() * saves into chan->of_node a pointer to the channel OF node * automatically gets and puts 'channel' * now the node saved in chan->of_node has refcount 0, can disappear * tegra_csi_channels_init * iterates over channels * tegra_csi_channel_init -- uses chan->of_node After that, chan->of_node keeps storing the node until the device is removed. of_node_get() the node and of_node_put() it during teardown to avoid any risk.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1ebaeb09830f36c1111b72a95420814225bd761c before 5451efb2ca30f3c42b9efb8327ce35b62870dbd3; affected 1ebaeb09830f36c1111b72a95420814225bd761c before ce50c612458091d926ccb05d7db11d9f93532db2; affected 1ebaeb09830f36c1111b72a95420814225bd761c before 6512c9498fcb97e7c760e3ef86b2272f2c0f765f; affected 1ebaeb09830f36c1111b72a95420814225bd761c before 0fd003d3c708c80350a815eaf37b8e1114b976cf; affected 1ebaeb09830f36c1111b72a95420814225bd761c before c4d344163c3a7f90712525f931a6c016bbb35e18 |
| Linux / Linux | affected 5.10; unaffected 0 before 5.10; unaffected 5.10.163 through 5.10.*; unaffected 5.15.87 through 5.15.*; unaffected 6.0.18 through 6.0.*; unaffected 6.1.4 through 6.1.*; unaffected 6.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/5451efb2ca30f3c42b9efb8327ce35b62870dbd3
- https://git.kernel.org/stable/c/ce50c612458091d926ccb05d7db11d9f93532db2
- https://git.kernel.org/stable/c/6512c9498fcb97e7c760e3ef86b2272f2c0f765f
- https://git.kernel.org/stable/c/0fd003d3c708c80350a815eaf37b8e1114b976cf
- https://git.kernel.org/stable/c/c4d344163c3a7f90712525f931a6c016bbb35e18