CVE-2021-47088
High
Description
In the Linux kernel, the following vulnerability has been resolved: mm/damon/dbgfs: protect targets destructions with kdamond_lock DAMON debugfs interface iterates current monitoring targets in 'dbgfs_target_ids_read()' while holding the corresponding 'kdamond_lock'. However, it also destructs the monitoring targets in 'dbgfs_before_terminate()' without holding the lock. This can result in a use_after_free bug. This commit avoids the race by protecting the destruction with the corresponding 'kdamond_lock'.
SeverityHigh
CVSS7.0
Exploit probability—
Product
Linux Kernel
PublishedMar 4, 2024
First seenMar 4, 2024
How to fix
Update
- linux linux_kernel5.15.12 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 5.15 ≤ v < 5.15.12, 5.16 | 5.15.12 |
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