Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: __legitimize_mnt(): check for MNT_SYNC_UMOUNT should be under mount_lock ... or we risk stealing final mntput from sync umount - raising mnt_count after umount(2) has verified that victim is not busy, but before it has set MNT_SYNC_UMOUNT; in that case __legitimize_mnt() doesn't see that it's safe to quietly undo mnt_count increment and leaves dropping the reference to caller, where it'll be a full-blown mntput(). Check under mount_lock is needed; leaving the current one done before taking that makes no sense - it's nowhere near common enough to bother with.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 48a066e72d970a3e225a9c18690d570c736fc455 before 628fb00195ce21a90cf9e4e3d105cd9e58f77b40; affected 48a066e72d970a3e225a9c18690d570c736fc455 before b89eb56a378b7b2c1176787fc228d0a57172bdd5; affected 48a066e72d970a3e225a9c18690d570c736fc455 before f6d45fd92f62845cbd1eb5128fd8f0ed7d0c5a42; affected 48a066e72d970a3e225a9c18690d570c736fc455 before 9b0915e72b3cf52474dcee0b24a2f99d93e604a3; affected 48a066e72d970a3e225a9c18690d570c736fc455 before d8ece4ced3b051e656c77180df2e69e19e24edc1; affected 48a066e72d970a3e225a9c18690d570c736fc455 before 8cafd7266fa02e0863bacbf872fe635c0b9725eb; affected 48a066e72d970a3e225a9c18690d570c736fc455 before b55996939c71a3e1a38f3cdc6a8859797efc9083; affected 48a066e72d970a3e225a9c18690d570c736fc455 before 250cf3693060a5f803c5f1ddc082bb06b16112a9 |
| Linux / Linux | affected 3.13; unaffected 0 before 3.13; unaffected 5.4.294 through 5.4.*; unaffected 5.10.238 through 5.10.*; unaffected 5.15.185 through 5.15.*; unaffected 6.1.141 through 6.1.*; unaffected 6.6.93 through 6.6.*; unaffected 6.12.31 through 6.12.*; unaffected 6.14.9 through 6.14.*; unaffected 6.15 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/628fb00195ce21a90cf9e4e3d105cd9e58f77b40
- https://git.kernel.org/stable/c/b89eb56a378b7b2c1176787fc228d0a57172bdd5
- https://git.kernel.org/stable/c/f6d45fd92f62845cbd1eb5128fd8f0ed7d0c5a42
- https://git.kernel.org/stable/c/9b0915e72b3cf52474dcee0b24a2f99d93e604a3
- https://git.kernel.org/stable/c/d8ece4ced3b051e656c77180df2e69e19e24edc1
- https://git.kernel.org/stable/c/8cafd7266fa02e0863bacbf872fe635c0b9725eb
- https://git.kernel.org/stable/c/b55996939c71a3e1a38f3cdc6a8859797efc9083
- https://git.kernel.org/stable/c/250cf3693060a5f803c5f1ddc082bb06b16112a9
ADP enrichment
No English description supplied.
No English description supplied.
No English description supplied.
No references supplied.