CVSS 7.8 · High EPSS 0,13%
Kerentanan Use After Free pada linux kernel. Skor CVSS 3.1 7.8 (High) menurut CNA.
In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: fix UAF in __blkcg_rstat_flush() When multiple blkgs in the same blkcg are released concurrently, a use-after-free can occur. The race happens when one blkg's __blkcg_rstat_flush() removes another blkg's iostat entries via llist_del_all(). The second blkg sees an empty list and proceeds to free itself while the first is still iterating over its entries. Move the flush from __blkg_release() (RCU callback) to blkg_release() (before call_rcu). This ensures the RCU grace period waits for any concurrent flush's rcu_read_lock() section to complete before freeing.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Versi 6.3.9 hingga sebelum 6.4 |
| linux | linux kernel | Versi 6.4.1 hingga sebelum 6.6.144 |
| linux | linux kernel | Versi 6.7 hingga sebelum 6.12.95 |
| linux | linux kernel | Versi 6.13 hingga sebelum 6.18.38 |
| linux | linux kernel | Versi 6.19 hingga sebelum 7.1.3 |
| linux | linux kernel | Versi 6.4 |
| linux | linux kernel | Versi 6.4 rc7 |