CVE-2026-68332

In the Linux kernel, the following vulnerability has been resolved: net: airoha: Fix potential use-after-free in airoha_ppe_deinit() airoha_ppe_deinit() replaces the NPU pointer with NULL via rcu_replace_pointer() but does not wait for existing RCU readers to exit before calling ppe_deinit() and airoha_npu_put(). This can cause a use-after-free if a reader in an RCU read-side critical section still holds a reference to the NPU when it is freed. The init path (airoha_ppe_init) already calls synchronize_rcu() after rcu_assign_pointer(), but the deinit path introduced in commit 6abcf751bc08 ("net: airoha: Fix schedule while atomic in airoha_ppe_deinit()") omitted the matching barrier when switching from rcu_read_lock()/rcu_dereference() to rcu_replace_pointer(). Add synchronize_rcu() before ppe_deinit() to ensure all existing RCU readers have completed before the NPU resources are released.

CVSS

No CVSS.

References

Link	Resource
https://git.kernel.org/stable/c/2484568a335cd7bda951c75b3a7d95ea36161ae7
https://git.kernel.org/stable/c/46e3bed4b071095ecc9384a7b349e1908728531f
https://git.kernel.org/stable/c/ad28c4f9e0eae4993cb3fde3e7cea330acd8b97c

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-10 13:20

Updated : 2026-08-17 06:17

NVD link : CVE-2026-68332

Mitre link : CVE-2026-68332

CVE.ORG link : CVE-2026-68332

JSON object : View

Products Affected

No product.

CWE

No CWE.

{"id": "CVE-2026-68332", "cveTags": [], "metrics": {}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "72f93dc6d1a6b157e0c3d247085c74935893cca0", "lessThan": "46e3bed4b071095ecc9384a7b349e1908728531f", "versionType": "git"}, {"status": "affected", "version": "6abcf751bc084804a9e5b3051442e8a2ce67f48a", "lessThan": "ad28c4f9e0eae4993cb3fde3e7cea330acd8b97c", "versionType": "git"}, {"status": "affected", "version": "6abcf751bc084804a9e5b3051442e8a2ce67f48a", "lessThan": "2484568a335cd7bda951c75b3a7d95ea36161ae7", "versionType": "git"}, {"status": "affected", "version": "6.18.6", "lessThan": "6.18.42", "versionType": "semver"}], "programFiles": ["drivers/net/ethernet/airoha/airoha_ppe.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.19"}, {"status": "unaffected", "version": "0", "lessThan": "6.19", "versionType": "semver"}, {"status": "unaffected", "version": "6.18.42", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.1.6", "versionType": "semver", "lessThanOrEqual": "7.1.*"}, {"status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/net/ethernet/airoha/airoha_ppe.c"], "defaultStatus": "affected"}]}], "published": "2026-08-10T13:20:23.523", "references": [{"url": "https://git.kernel.org/stable/c/2484568a335cd7bda951c75b3a7d95ea36161ae7", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/46e3bed4b071095ecc9384a7b349e1908728531f", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ad28c4f9e0eae4993cb3fde3e7cea330acd8b97c", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Received", "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: airoha: Fix potential use-after-free in airoha_ppe_deinit()\n\nairoha_ppe_deinit() replaces the NPU pointer with NULL via\nrcu_replace_pointer() but does not wait for existing RCU readers\nto exit before calling ppe_deinit() and airoha_npu_put(). This can\ncause a use-after-free if a reader in an RCU read-side critical\nsection still holds a reference to the NPU when it is freed.\n\nThe init path (airoha_ppe_init) already calls synchronize_rcu()\nafter rcu_assign_pointer(), but the deinit path introduced in\ncommit 6abcf751bc08 (\"net: airoha: Fix schedule while atomic in\nairoha_ppe_deinit()\") omitted the matching barrier when switching\nfrom rcu_read_lock()/rcu_dereference() to rcu_replace_pointer().\n\nAdd synchronize_rcu() before ppe_deinit() to ensure all existing\nRCU readers have completed before the NPU resources are released."}], "lastModified": "2026-08-17T06:17:41.317", "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}