CVE-2026-80617 (GCVE-0-2026-80617)

Vulnerability from cvelistv5 – Published: 2026-08-28 06:48 – Updated: 2026-08-29 06:21
VLAI
Title
net: airoha: fix foe_check_time allocation size
Summary
In the Linux kernel, the following vulnerability has been resolved: net: airoha: fix foe_check_time allocation size foe_check_time is declared as u16 pointer but was allocated with only ppe_num_entries bytes instead of ppe_num_entries * sizeof(u16). When airoha_ppe_foe_verify_entry() is called with hash >= ppe_num_entries/2, it writes beyond the allocated buffer, causing heap buffer overflow and potential kernel crash.
Severity
9.8 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 56b99327a451917f1c17f85fc33ea8293c08a9ee , < 112b5eff24e044561ee9599a0d34e0fcea1df4e0 (git)
Affected: 6d5b601d52a27aafff555b480e538507901c672c , < 9f7cd1e26d2f1766438edc9b9254f2c618f9ae98 (git)
Affected: 6d5b601d52a27aafff555b480e538507901c672c , < 5c121ee635680c93d7074becf14cfbaac140f80d (git)
Affected: 6.18.33 , < 6.18.40 (semver)
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Linux Linux Affected: 6.19
Unaffected: 0 , < 6.19 (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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      "affected": [
        {
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          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/airoha/airoha_ppe.c"
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                  "versionStartIncluding": "6.18.33",
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              ],
              "negate": false,
              "operator": "OR"
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      "descriptions": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: airoha: fix foe_check_time allocation size\n\nfoe_check_time is declared as u16 pointer but was allocated with\nonly ppe_num_entries bytes instead of ppe_num_entries * sizeof(u16).\n\nWhen airoha_ppe_foe_verify_entry() is called with hash \u003e= ppe_num_entries/2,\nit writes beyond the allocated buffer, causing heap buffer overflow and\npotential kernel crash."
        }
      ],
      "metrics": [
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            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The overflow is reached from netdev RX when hardware PPE reports HIT_UNBIND_RATE_REACHED; on Airoha EN7581/AN7583 CPE/router SoCs this path is driven by remotely sourced Ethernet WAN/LAN or WiFi traffic without local syscall access.\nAC:L - An attacker controls packet 5-tuples and send rate to populate FOE entries and force CPU-reason 0x0f; roughly half of valid hash indices (hash \u003e= ppe_num_entries/2) deterministically hit the undersized buffer, with only a 100ms per-hash software throttle.\nPR:N - Exploitation requires only the ability to send network packets to or through the device\u0027s registered interfaces; no local account, capability, namespace admin rights, or authentication on the RX/offload path.\nUI:N - No cooperative victim action is needed beyond normal always-on routing/bridging of attacker-supplied packets through the Airoha Ethernet or mt76 WiFi RX handlers.\nS:U - Impact is confined to kernel heap memory corruption and privilege escalation within the host running the Airoha driver; it does not cross a VM, hypervisor, or IOMMU security boundary.\nC:H - airoha_ppe_check_skb() performs an out-of-bounds read of ppe-\u003efoe_check_time[hash] before writing a u16 timestamp, and the adjacent heap overflow can expose or corrupt neighboring kernel objects.\nI:H - The same path writes a u16 beyond the allocated foe_check_time buffer, giving a kernel heap out-of-bounds write that can be leveraged for further memory corruption or control-flow manipulation.\nA:H - The fix commit explicitly warns of heap buffer overflow and potential kernel crash; corrupted adjacent heap metadata or pointers from the OOB access can trigger oops, panic, or loss of network availability."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-29T06:21:25.270Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
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          "url": "https://git.kernel.org/stable/c/112b5eff24e044561ee9599a0d34e0fcea1df4e0"
        },
        {
          "url": "https://git.kernel.org/stable/c/9f7cd1e26d2f1766438edc9b9254f2c618f9ae98"
        },
        {
          "url": "https://git.kernel.org/stable/c/5c121ee635680c93d7074becf14cfbaac140f80d"
        }
      ],
      "title": "net: airoha: fix foe_check_time allocation size",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80617",
    "datePublished": "2026-08-28T06:48:37.508Z",
    "dateReserved": "2026-08-26T14:34:25.774Z",
    "dateUpdated": "2026-08-29T06:21:25.270Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-09-01T10:57:28+00:00",
      "cve": "CVE-2026-80617",
      "id": "CVE-2026-80617",
      "initial_release_date": "2026-08-28T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: airoha: fix foe_check_time allocation size",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80617.json",
      "version": "3"
    }
  }
}



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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

Author Source Type Date Other

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.