net: page_pool: fix use-after-free in page_pool_recycle_ring_bulk()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98804
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-18 16:17:34 UTC
Updated2026-10-19 10:19:44 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected fcc680a647ba77370480fe753664cc10d572b240 f78d45d5f1ac4141a03f033141368671da4293e4 git Not specified
CNA Linux Linux affected fcc680a647ba77370480fe753664cc10d572b240 0b105f4eb78e5ee39e5a74c47c9efd69b6ac849c git Not specified
CNA Linux Linux affected fcc680a647ba77370480fe753664cc10d572b240 bdea4980182e3badac74f04df6c07492b91c569e git Not specified
CNA Linux Linux affected 6.14 Not specified
CNA Linux Linux unaffected 6.14 semver Not specified
CNA Linux Linux unaffected 6.18.56 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.10 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/bdea4980182e3badac74f04df6c07492b91c569e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/0b105f4eb78e5ee39e5a74c47c9efd69b6ac849c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/f78d45d5f1ac4141a03f033141368671da4293e4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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