CVE-2026-72296Network attack vector

System crash via truncated inner Ethernet header

Published Aug 15, 2026 · Updated Aug 15, 2026

Out-of-bounds read in Linux kernel IFE decapsulation allows remote attackers to crash the system with a malformed IFE frame. ife_decode() returns without making the full inner Ethernet header linear, then eth_type_trans() reads it as though ETH_HLEN bytes were accessible. The attacker needs network reachability capable of delivering a crafted IFE frame; successful exploitation interrupts services by crashing the host.

CVSS severity9.1
Critical
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in Linux kernel IFE decapsulation allows remote attackers to crash the system with a malformed IFE frame. ife_decode() returns without making the full inner Ethernet header linear, then eth_type_trans() reads it as though ETH_HLEN bytes were accessible. The attacker needs network reachability capable of delivering a crafted IFE frame; successful exploitation interrupts services by crashing the host.

The record

CVE
CVE-2026-72296
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-125, CWE-119, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.6
  2. Affected versionversion=ef6980b6becb1afd9d82a4f043749a10ae81bf14 <1cb42ec10294a55380e52e674b3df2b962648242
  3. Affected versionversion=ef6980b6becb1afd9d82a4f043749a10ae81bf14 <5526d1997aea6c9bd865ca4d4894b52e799d735c
  4. Affected versionversion=ef6980b6becb1afd9d82a4f043749a10ae81bf14 <70013f9163bef7fbd9fa62f81cf91b2a7ba66163
  5. Affected versionversion=ef6980b6becb1afd9d82a4f043749a10ae81bf14 <8c8818e52fddb247ff3214622401a4de6ff8482e
  6. Affected versionversion=ef6980b6becb1afd9d82a4f043749a10ae81bf14 <9406f6012b7343661efb516a11c62d4db2b62f75
  7. Affected versionversion=ef6980b6becb1afd9d82a4f043749a10ae81bf14 <9433578bff9c100c466a6354574892e55293cb8f
  8. Affected versionversion=ef6980b6becb1afd9d82a4f043749a10ae81bf14 <b69ad768cd4a2ef4e07c18492ae85438ed17c7cb
  9. Affected versionversion=ef6980b6becb1afd9d82a4f043749a10ae81bf14 <be272e159dfe1207b67332ad6e17adcf59b4ea4b

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.6; version=ef6980b6becb1afd9d82a4f043749a10ae81bf14 <1cb42ec10294a55380e52e674b3df2b962648242; version=ef6980b6becb1afd9d82a4f043749a10ae81bf14 <5526d1997aea6c9bd865ca4d4894b52e799d735c; version=ef6980b6becb1afd9d82a4f043749a10ae81bf14 <70013f9163bef7fbd9fa62f81cf91b2a7ba66163; version=ef6980b6becb1afd9d82a4f043749a10ae81bf14 <8c8818e52fddb247ff3214622401a4de6ff8482e; version=ef6980b6becb1afd9d82a4f043749a10ae81bf14 <9406f6012b7343661efb516a11c62d4db2b62f75; version=ef6980b6becb1afd9d82a4f043749a10ae81bf14 <9433578bff9c100c466a6354574892e55293cb8f; version=ef6980b6becb1afd9d82a4f043749a10ae81bf14 <b69ad768cd4a2ef4e07c18492ae85438ed17c7cb; version=ef6980b6becb1afd9d82a4f043749a10ae81bf14 <be272e159dfe1207b67332ad6e17adcf59b4ea4b

Published CVSS scores

6.5Amazon LinuxCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
9.1Linux CNA via CVE.orgCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.8CanonicalCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-125Out-of-bounds Read
CWE-119Improper Restriction of Operations within the Bounds of a Memory Buffer
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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