Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: net: page_pool: fix use-after-free in page_pool_recycle_ring_bulk() With CONFIG_PAGE_POOL_STATS=y, page_pool_recycle_ring_bulk() updates the recycle stats after dropping the producer lock. If it just recycled the last inflight netmems of a pool being destroyed, page_pool_release() can pass its producer-lock barrier and free the pool before recycle_stat_add() runs. Commit fcc680a647ba7 ("page_pool: allow mixing PPs within one bulk") moved this stat update after the unlock. Commit 271683bb2cf32 ("page_pool: Fix use-after-free in page_pool_recycle_in_ring") later added the barrier, but only fixed page_pool_recycle_in_ring(). Move the update back under the lock.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected fcc680a647ba77370480fe753664cc10d572b240 before f78d45d5f1ac4141a03f033141368671da4293e4; affected fcc680a647ba77370480fe753664cc10d572b240 before 0b105f4eb78e5ee39e5a74c47c9efd69b6ac849c; affected fcc680a647ba77370480fe753664cc10d572b240 before bdea4980182e3badac74f04df6c07492b91c569e |
| Linux / Linux | affected 6.14; unaffected 0 before 6.14; unaffected 6.18.56 through 6.18.*; unaffected 7.2.10 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.