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CVE Record

CVE-2026-80617: net: airoha: fix foe_check_time allocation size

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.

CriticalCVSS 9.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

A Linux Airoha networking driver allocates only half the memory needed for a timing array. Under the documented condition, the kernel writes past that allocation, potentially corrupting memory and crashing the system. Systems without the affected driver or code path are unlikely to be exposed.

Executive priority

Treat as an urgent validation and patching issue for appliances or servers using Airoha networking. A kernel crash could interrupt critical network services, while heap corruption creates broader theoretical impact. Avoid assuming every Linux host is exposed; prioritize confirmed driver use and vendor-confirmed vulnerable builds.

Technical view

foe_check_time is a u16 pointer, but its allocation used ppe_num_entries bytes instead of ppe_num_entries multiplied by sizeof(u16). In airoha_ppe_foe_verify_entry(), a hash at or above half the entry count can therefore cause a heap buffer overflow. The cited stable-kernel commits correct the allocation size.

Likely exposure

Exposure depends on running an affected Linux build with the Airoha networking driver and vulnerable PPE flow-entry verification path present. The supplied version data is ambiguous and may not reflect downstream backports, so kernel version alone is insufficient. Confirm driver use and vendor patch status.

Exploitation context

The bundle assigns CVSS 9.8 with network reachability, low complexity, and no required privileges or interaction. However, it provides no exploit-path analysis beyond the vulnerable function condition. The CVE is not listed as KEV, and the supplied sources do not report active exploitation or public weaponization.

Researcher notes

The allocation defect and out-of-bounds condition are clearly described, but the supplied affected-version records are difficult to interpret and include commit identifiers alongside release numbers. The sources establish potential kernel crash, not demonstrated code execution. Researchers should verify reachability, configuration prerequisites, and downstream backports without inferring exploitation.

Mitigation direction

  • Install a vendor-supported kernel containing the applicable referenced stable fix.
  • Check distribution or device-vendor guidance for downstream backport status.
  • Prioritize internet-facing or availability-critical systems using the Airoha driver.
  • If updating is delayed, assess whether the affected driver or feature can be safely disabled.

Validation and detection

  • Inventory kernel versions and identify systems loading or using the Airoha networking driver.
  • Compare each kernel build with vendor advisories and downstream patch records.
  • Verify the applicable stable fix is present in the deployed kernel source or package metadata.
  • Monitor affected systems for unexplained kernel crashes or memory-corruption reports.
Prepared
Confidence
medium
Sources
5

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

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CVE-2026-80617 mapping review

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Vulnerability profileCVE Program record
Severity
Critical
CVSS
9.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
3Timeline events
0ADP providers
4Source links

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
9.8CVSS 3.1CriticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H3.95.9Linux

Vulnerability scoring details

Base CVSS 3.1 score

9.8Critical
CVSS 3.1 vector shape for CVE-2026-80617Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux56b99327a451917f1c17f85fc33ea8293c08a9ee, 6d5b601d52a27aafff555b480e538507901c672c, 6d5b601d52a27aafff555b480e538507901c672c, 6.18.33unaffected
LinuxLinux6.19, 0, 6.18.40, 7.1.5, 7.2affected
Weakness

CWE details

No CWE listed

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