CVE-2026-80681

Use-after-free via stale VXLAN Ethernet header

Published Aug 28, 2026 · Updated Aug 28, 2026

Use-after-free in the Linux kernel VXLAN transmit path allows attackers to trigger stale-memory access through routed traffic. vxlan_xmit caches eth_hdr(skb) before route_shortcircuit(), whose pskb_may_pull() call can reallocate skb->head, then dereferences the freed eth pointer at eth->h_dest. Reachability requires VXLAN route-short-circuit processing; published material does not establish whether the stale access causes a crash or code execution.

CVSS severityUnavailable
Unscored
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux kernel VXLAN transmit path allows attackers to trigger stale-memory access through routed traffic. vxlan_xmit caches eth_hdr(skb) before route_shortcircuit(), whose pskb_may_pull() call can reallocate skb->head, then dereferences the freed eth pointer at eth->h_dest. Reachability requires VXLAN route-short-circuit processing; published material does not establish whether the stale access causes a crash or code execution.

The record

CVE
CVE-2026-80681
Published
Aug 28, 2026
Updated
Aug 28, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Aug 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=3.10
  2. Affected versionversion=ae8840825605f36f98f247323edc150e761cb64e <1235e017aa11cf01e91b613c4c5ed6aa28934fff
  3. Affected versionversion=ae8840825605f36f98f247323edc150e761cb64e <1395a676ec15a0a02a2a6d86602324f2d5fd41d5
  4. Affected versionversion=ae8840825605f36f98f247323edc150e761cb64e <1511631b7cfc4152b10a0a9d04c7a0bf2ddf4585
  5. Affected versionversion=ae8840825605f36f98f247323edc150e761cb64e <1b7f7b653e3557690047c62f03b80a24ea5a58a5
  6. Affected versionversion=ae8840825605f36f98f247323edc150e761cb64e <2355c8c26d2aa1b4385b369e67202e47d460d555
  7. Affected versionversion=ae8840825605f36f98f247323edc150e761cb64e <6375093eb45cd7d89f1945f939eeae3b29d79f56
  8. Affected versionversion=ae8840825605f36f98f247323edc150e761cb64e <bf045341dfb3e767f0ff94cf240ce3c371973bd4
  9. Affected versionversion=ae8840825605f36f98f247323edc150e761cb64e <c9dceac9e1c7c772c43c732fc0d325e72835801a

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=3.10; version=ae8840825605f36f98f247323edc150e761cb64e <1235e017aa11cf01e91b613c4c5ed6aa28934fff; version=ae8840825605f36f98f247323edc150e761cb64e <1395a676ec15a0a02a2a6d86602324f2d5fd41d5; version=ae8840825605f36f98f247323edc150e761cb64e <1511631b7cfc4152b10a0a9d04c7a0bf2ddf4585; version=ae8840825605f36f98f247323edc150e761cb64e <1b7f7b653e3557690047c62f03b80a24ea5a58a5; version=ae8840825605f36f98f247323edc150e761cb64e <2355c8c26d2aa1b4385b369e67202e47d460d555; version=ae8840825605f36f98f247323edc150e761cb64e <6375093eb45cd7d89f1945f939eeae3b29d79f56; version=ae8840825605f36f98f247323edc150e761cb64e <bf045341dfb3e767f0ff94cf240ce3c371973bd4; version=ae8840825605f36f98f247323edc150e761cb64e <c9dceac9e1c7c772c43c732fc0d325e72835801a

Published CVSS scores

No CVSS assessment is available in this record.

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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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)
VectorUnavailable
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

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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