CVE-2026-99169

Wakeup interference via recycled memory-manager futex keys

Published Oct 28, 2026 · Updated Oct 28, 2026

Incorrect futex matching in Linux allows local users to disrupt thread wakeups via reused memory-manager addresses. get_futex_key() in kernel/futex/core.c keys FUT_OFF_MMSHARED futexes by an mm_struct address, so stale requeued waiters consume wakeups intended for a new memory manager at the same address. Triggering this requires local futex operations, cross-MM requeueing, and memory-manager address reuse; the documented consequence is missed or spurious wakeups, not a demonstrated kernel crash.

CVSS severityUnavailable

Unscored

EPSS probability0.18%

Next 30 days · Nov 1, 2026

Known exploitationUnconfirmed

Based on sourced intelligence

Hinoki checkNot available

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Summary

What happened

The record

CVE: CVE-2026-99169
Published: Oct 28, 2026
Updated: Oct 28, 2026

Vendor: The Linux Kernel Organization
Product: Linux
Classifications: Unavailable

Attack vector: local
Privileges: authenticated

Timeline

How it unfolded

Oct 28, 2026CVE publishedPublication date reported by the CVE source.
Oct 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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Affected versionversion=222993395ed38f3751287f4bd82ef46b3eb3a66d <2855ddc6844f527e375e78afb55ec2a5182f23b3
Affected versionversion=222993395ed38f3751287f4bd82ef46b3eb3a66d <3267512ad1c2cc0c7768c5b014dc2cceb398a801
Affected versionversion=222993395ed38f3751287f4bd82ef46b3eb3a66d <c17cc2027773e8e4913c5ab0fe3a489b1ed5bf81
Affected versionversion=5.7

What conditions does exploitation require?

Attack vectorlocal

Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=222993395ed38f3751287f4bd82ef46b3eb3a66d <2855ddc6844f527e375e78afb55ec2a5182f23b3; version=222993395ed38f3751287f4bd82ef46b3eb3a66d <3267512ad1c2cc0c7768c5b014dc2cceb398a801; version=222993395ed38f3751287f4bd82ef46b3eb3a66d <c17cc2027773e8e4913c5ab0fe3a489b1ed5bf81; version=5.7

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026

Latest reporting daySep 28, 2026

Latest daily unique IPsUnavailable

Prior 30-day averageUnavailable

SourceShadowserver honeypots (KEV)

Vectorlocal

Privilegesauthenticated

Known exploitationUnconfirmed

Public exploitUnconfirmed

Weakness, pattern, technique

No sourced classifications are available.

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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