CVSS 4.7 · Medium EPSS 0,22%
Kerentanan Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') pada linux kernel. Skor CVSS 3.1 4.7 (Medium) menurut NVD.
In the Linux kernel, the following vulnerability has been resolved: zsmalloc: fix races between asynchronous zspage free and page migration The asynchronous zspage free worker tries to lock a zspage's entire page list without defending against page migration. Since pages which haven't yet been locked can concurrently migrate off the zspage page list while lock_zspage() churns away, lock_zspage() can suffer from a few different lethal races. It can lock a page which no longer belongs to the zspage and unsafely dereference page_private(), it can unsafely dereference a torn pointer to the next page (since there's a data race), and it can observe a spurious NULL pointer to the next page and thus not lock all of the zspage's pages (since a single page migration will reconstruct the entire page list, and create_page_chain() unconditionally zeroes out each list pointer in the process). Fix the races by using migrate_read_lock() in lock_zspage() to synchronize with page migration.
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Versi 4.14 hingga sebelum 4.14.282 |
| linux | linux kernel | Versi 4.15 hingga sebelum 4.19.246 |
| linux | linux kernel | Versi 4.20 hingga sebelum 5.4.197 |
| linux | linux kernel | Versi 5.5 hingga sebelum 5.10.120 |
| linux | linux kernel | Versi 5.11 hingga sebelum 5.15.45 |
| linux | linux kernel | Versi 5.16 hingga sebelum 5.17.13 |
| linux | linux kernel | Versi 5.18 hingga sebelum 5.18.2 |