CVE-2026-80714

Kernel use-after-free via inherited one-packet flag

Published Aug 28, 2026 · Updated Aug 28, 2026

Use-after-free in Linux IPVS since 2.6.36 allows attackers to access freed kernel memory through synchronized connections. In ip_vs_bind_dest(), a late-bound destination copies IP_VS_CONN_F_ONE_PACKET into an already hashed synchronized connection, so expiry skips unlinking its conn_tab node. Reachability requires IPVS connection synchronization, destination creation after synchronization, and a one-packet destination; the documented outcome is a stale hash pointer to a freed ip_vs_conn structure.

CVSS severityUnavailable
Unscored
EPSS probability0.40%
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 Linux IPVS since 2.6.36 allows attackers to access freed kernel memory through synchronized connections. In ip_vs_bind_dest(), a late-bound destination copies IP_VS_CONN_F_ONE_PACKET into an already hashed synchronized connection, so expiry skips unlinking its conn_tab node. Reachability requires IPVS connection synchronization, destination creation after synchronization, and a one-packet destination; the documented outcome is a stale hash pointer to a freed ip_vs_conn structure.

The record

CVE
CVE-2026-80714
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?

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  1. Affected versionversion=2.6.36
  2. Affected versionversion=26ec037f9841e49cc5c615deb8e1e73e5beab2ca <06d1d9b56ef8132fbf85006885eb43d9510b8b02
  3. Affected versionversion=26ec037f9841e49cc5c615deb8e1e73e5beab2ca <300348e3ba1521b003d59825f97e24f9a6859688
  4. Affected versionversion=26ec037f9841e49cc5c615deb8e1e73e5beab2ca <44af98cc7d5ef8e730488d5df1eecd5deeaa5947
  5. Affected versionversion=26ec037f9841e49cc5c615deb8e1e73e5beab2ca <4649e6faeecdc2d44bfa6ccbe405eef27e55d816
  6. Affected versionversion=26ec037f9841e49cc5c615deb8e1e73e5beab2ca <a63d2dbaeb50a85d4c976b15a36e6b0c7113db5b
  7. Affected versionversion=26ec037f9841e49cc5c615deb8e1e73e5beab2ca <acbdc276091b308ca7794acb86e761f8203e2f59
  8. Affected versionversion=26ec037f9841e49cc5c615deb8e1e73e5beab2ca <b5ee5b266f833601ac4817f6df0bc496fc376a28
  9. Affected versionversion=26ec037f9841e49cc5c615deb8e1e73e5beab2ca <e7acfc990c29890c883d0d0ce3f737d003a43b44

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.36; version=26ec037f9841e49cc5c615deb8e1e73e5beab2ca <06d1d9b56ef8132fbf85006885eb43d9510b8b02; version=26ec037f9841e49cc5c615deb8e1e73e5beab2ca <300348e3ba1521b003d59825f97e24f9a6859688; version=26ec037f9841e49cc5c615deb8e1e73e5beab2ca <44af98cc7d5ef8e730488d5df1eecd5deeaa5947; version=26ec037f9841e49cc5c615deb8e1e73e5beab2ca <4649e6faeecdc2d44bfa6ccbe405eef27e55d816; version=26ec037f9841e49cc5c615deb8e1e73e5beab2ca <a63d2dbaeb50a85d4c976b15a36e6b0c7113db5b; version=26ec037f9841e49cc5c615deb8e1e73e5beab2ca <acbdc276091b308ca7794acb86e761f8203e2f59; version=26ec037f9841e49cc5c615deb8e1e73e5beab2ca <b5ee5b266f833601ac4817f6df0bc496fc376a28; version=26ec037f9841e49cc5c615deb8e1e73e5beab2ca <e7acfc990c29890c883d0d0ce3f737d003a43b44

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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