CVE-2025-21879
btrfs: fix use-after-free on inode when scanning root during em shrinking
CVSS Score
7.8
EPSS Score
0.0%
EPSS Percentile
0th
In the Linux kernel, the following vulnerability has been resolved: btrfs: fix use-after-free on inode when scanning root during em shrinking At btrfs_scan_root() we are accessing the inode's root (and fs_info) in a call to btrfs_fs_closing() after we have scheduled the inode for a delayed iput, and that can result in a use-after-free on the inode in case the cleaner kthread does the iput before we dereference the inode in the call to btrfs_fs_closing(). Fix this by using the fs_info stored already in a local variable instead of doing inode->root->fs_info.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Mar 27, 2025 |
| Last Updated | May 11, 2026 |
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Affected Versions
Linux / Linux
fef55c4d9c9c22264d2b2ceae1e26922cb6129a5 < 07836bc18f4ae42da4e922244f4685561c18755e 1020443840569535f6025a855958f07ea3eebf71 < 5e79d26014f9386387575b9ed60d342057cee49b 1020443840569535f6025a855958f07ea3eebf71 < 59f37036bb7ab3d554c24abc856aabca01126414
Linux / Linux
6.13