CVE-2026-80777Hinoki check available

Stale address-space association via PI-futex exec race

Published Sep 4, 2026 · Updated Sep 4, 2026

Race condition in the private PI-futex exec path in Linux allows local users to create a stale address-space association. futex_exec_release() marks the task ready before exec_mmap() replaces its mm, so attach_to_pi_owner() can accept an address space being retired. Triggering requires concurrent private PI-futex ownership and exec activity; the CNA has not published a resulting crash, disclosure, or privilege impact.

CVSS severityUnavailable
Unscored
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Race condition in the private PI-futex exec path in Linux allows local users to create a stale address-space association. futex_exec_release() marks the task ready before exec_mmap() replaces its mm, so attach_to_pi_owner() can accept an address space being retired. Triggering requires concurrent private PI-futex ownership and exec activity; the CNA has not published a resulting crash, disclosure, or privilege impact.

The record

CVE
CVE-2026-80777
Published
Sep 4, 2026
Updated
Sep 4, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 4, 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=6.16
  2. Affected versionversion=80367ad01d93ac781b0e1df246edaf006928002f <0478bc6bf197629fea0331d65b39eeea043c6cf0
  3. Affected versionversion=80367ad01d93ac781b0e1df246edaf006928002f <c5f0bc9fd1cec4a00400cc727fcde03e0fde17cc
  4. Affected versionversion=80367ad01d93ac781b0e1df246edaf006928002f <d7944cee62ec6cca1c90780a766960a57d3b4bb8
  5. Affected versionversion=80367ad01d93ac781b0e1df246edaf006928002f <fdf538b2e69653ff740e84042245018e5680cd7b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.16; version=80367ad01d93ac781b0e1df246edaf006928002f <0478bc6bf197629fea0331d65b39eeea043c6cf0; version=80367ad01d93ac781b0e1df246edaf006928002f <c5f0bc9fd1cec4a00400cc727fcde03e0fde17cc; version=80367ad01d93ac781b0e1df246edaf006928002f <d7944cee62ec6cca1c90780a766960a57d3b4bb8; version=80367ad01d93ac781b0e1df246edaf006928002f <fdf538b2e69653ff740e84042245018e5680cd7b

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

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

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
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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