CVE-2026-68332 (GCVE-0-2026-68332)

Vulnerability from cvelistv5 – Published: 2026-08-10 12:03 – Updated: 2026-08-17 05:03
VLAI
Title
net: airoha: Fix potential use-after-free in airoha_ppe_deinit()
Summary
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 72f93dc6d1a6b157e0c3d247085c74935893cca0 , < 46e3bed4b071095ecc9384a7b349e1908728531f (git)
Affected: 6abcf751bc084804a9e5b3051442e8a2ce67f48a , < ad28c4f9e0eae4993cb3fde3e7cea330acd8b97c (git)
Affected: 6abcf751bc084804a9e5b3051442e8a2ce67f48a , < 2484568a335cd7bda951c75b3a7d95ea36161ae7 (git)
Affected: 6.18.6 , < 6.18.42 (semver)
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Linux Linux Affected: 6.19
Unaffected: 0 , < 6.19 (semver)
Unaffected: 6.18.42 , ≤ 6.18.* (semver)
Unaffected: 7.1.6 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/airoha/airoha_ppe.c"
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                {
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              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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."
        }
      ],
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        "dateUpdated": "2026-08-17T05:03:30.927Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/46e3bed4b071095ecc9384a7b349e1908728531f"
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          "url": "https://git.kernel.org/stable/c/ad28c4f9e0eae4993cb3fde3e7cea330acd8b97c"
        },
        {
          "url": "https://git.kernel.org/stable/c/2484568a335cd7bda951c75b3a7d95ea36161ae7"
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      ],
      "title": "net: airoha: Fix potential use-after-free in airoha_ppe_deinit()",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68332",
    "datePublished": "2026-08-10T12:03:08.525Z",
    "dateReserved": "2026-07-30T09:28:09.383Z",
    "dateUpdated": "2026-08-17T05:03:30.927Z",
    "state": "PUBLISHED"
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    "redhat_vex": {
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      "current_release_date": "2026-08-14T17:30:36+00:00",
      "cve": "CVE-2026-68332",
      "id": "CVE-2026-68332",
      "initial_release_date": "2026-08-10T00:00:00+00:00",
      "product_status:known_affected": "260",
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      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: airoha: Fix potential use-after-free in airoha_ppe_deinit()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68332.json",
      "version": "3"
    },
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      "current_release_date": "2026-08-11T23:47:34Z",
      "cve": "CVE-2026-68332",
      "id": "CVE-2026-68332",
      "initial_release_date": "2026-08-11T23:47:34Z",
      "product_status:known_not_affected": "296",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68332",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68332.json",
      "version": "2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.