Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix use-after-free bug of nilfs_root in nilfs_evict_inode() During unmount process of nilfs2, nothing holds nilfs_root structure after nilfs2 detaches its writer in nilfs_detach_log_writer(). However, since nilfs_evict_inode() uses nilfs_root for some cleanup operations, it may cause use-after-free read if inodes are left in "garbage_list" and released by nilfs_dispose_list() at the end of nilfs_detach_log_writer(). Fix this issue by modifying nilfs_evict_inode() to only clear inode without additional metadata changes that use nilfs_root if the file system is degraded to read-only or the writer is detached.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected e912a5b66837ee89fb025e67b5efeaa11930c2ce before f31e18131ee2ce80a4da5c808221d25b1ae9ad6d; affected e912a5b66837ee89fb025e67b5efeaa11930c2ce before 2a782ea8ebd712a458466e3103e2881b4f886cb5; affected e912a5b66837ee89fb025e67b5efeaa11930c2ce before 116d53f09ff52e6f98e3fe1f85d8898d6ba26c68; affected e912a5b66837ee89fb025e67b5efeaa11930c2ce before 6b4205ea97901f822004e6c8d59484ccfda03faa; affected e912a5b66837ee89fb025e67b5efeaa11930c2ce before b8427b8522d9ede53015ba45a9978ba68d1162f5; affected e912a5b66837ee89fb025e67b5efeaa11930c2ce before acc2a40e428f12780004e1e9fce4722d88f909fd; affected e912a5b66837ee89fb025e67b5efeaa11930c2ce before fb8e8d58f116d069e5939e1f786ac84e7fa4533e; affected e912a5b66837ee89fb025e67b5efeaa11930c2ce before 9b5a04ac3ad9898c4745cba46ea26de74ba56a8e |
| Linux / Linux | affected 2.6.37; unaffected 0 before 2.6.37; unaffected 4.14.316 through 4.14.*; unaffected 4.19.284 through 4.19.*; unaffected 5.4.244 through 5.4.*; unaffected 5.10.181 through 5.10.*; unaffected 5.15.113 through 5.15.*; unaffected 6.1.30 through 6.1.*; unaffected 6.3.4 through 6.3.*; unaffected 6.4 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/f31e18131ee2ce80a4da5c808221d25b1ae9ad6d
- https://git.kernel.org/stable/c/2a782ea8ebd712a458466e3103e2881b4f886cb5
- https://git.kernel.org/stable/c/116d53f09ff52e6f98e3fe1f85d8898d6ba26c68
- https://git.kernel.org/stable/c/6b4205ea97901f822004e6c8d59484ccfda03faa
- https://git.kernel.org/stable/c/b8427b8522d9ede53015ba45a9978ba68d1162f5
- https://git.kernel.org/stable/c/acc2a40e428f12780004e1e9fce4722d88f909fd
- https://git.kernel.org/stable/c/fb8e8d58f116d069e5939e1f786ac84e7fa4533e
- https://git.kernel.org/stable/c/9b5a04ac3ad9898c4745cba46ea26de74ba56a8e