Tracker / CVE-2022-49492
CVE-2022-49492
Medium 5.5
In the Linux kernel, the following vulnerability has been resolved: nvme-pci: fix a NULL pointer dereference in nvme_alloc_admin_tags In nvme_alloc_admin_tags, the admin_q can be set to an error (typically -ENOMEM) if the blk_mq_init_queue call fails to set up the queue, which is checked immediately after the call. However, when we return the error message up the stack, to nvme_reset_work the error takes us to nvme_remove_dead_ctrl() nvme_dev_disable() nvme_suspend_queue(&dev->queues[0]). Here, we only check that the admin_q is non-NULL, rather than not an error or NULL, and begin quiescing a queue that never existed, leading to bad / NULL pointer dereference.
Affected products and versions
| linux | linux_kernel · … → 4.9.318 |
|---|---|
| linux | linux_kernel · 4.10 → 4.14.283 |
| linux | linux_kernel · 4.15 → 4.19.247 |
| linux | linux_kernel · 4.20 → 5.4.198 |
| linux | linux_kernel · 5.11 → 5.15.46 |
| linux | linux_kernel · 5.16 → 5.17.14 |
| linux | linux_kernel · 5.18 → 5.18.3 |
| linux | linux_kernel · 5.5 → 5.10.121 |
Analysis
This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.