CVE-2026-64416

Local host crash via unchecked swap-cgroup map

Published Jul 25, 2026 · Updated Jul 25, 2026

NULL pointer dereference in the Linux Kernel swap-cgroup code allows local users to crash a swapless host during process exit. lookup_swap_cgroup_id passes an unregistered swap type's NULL map into __swap_cgroup_id_lookup, which dereferences it after swap_pte_batch accepts the PTE without swap_info validation. Exploitation requires local low-privileged access, a swapless configuration, and prior corruption of a PTE into a real swap entry; the bounded impact is a host crash.

CVSS severity4.7
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in the Linux Kernel swap-cgroup code allows local users to crash a swapless host during process exit. lookup_swap_cgroup_id passes an unregistered swap type's NULL map into __swap_cgroup_id_lookup, which dereferences it after swap_pte_batch accepts the PTE without swap_info validation. Exploitation requires local low-privileged access, a swapless configuration, and prior corruption of a PTE into a real swap entry; the bounded impact is a host crash.

The record

CVE
CVE-2026-64416
Published
Jul 25, 2026
Updated
Jul 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 25, 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=6.12
  2. Affected versionversion=bea67dcc5eea0f6a213897a59b9e644977cd07e6 <63b02a9409cb5180398491b093e48bcb5315f5fb
  3. Affected versionversion=bea67dcc5eea0f6a213897a59b9e644977cd07e6 <6a4196d19f477524d2f92adca90fc1fbe9a0420a
  4. Affected versionversion=bea67dcc5eea0f6a213897a59b9e644977cd07e6 <818416fef38759f23210de449663cd9d7e293d39
  5. Affected versionversion=bea67dcc5eea0f6a213897a59b9e644977cd07e6 <b415c00bf23df577a4a95673d00ae76687bcc1d4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.12; version=bea67dcc5eea0f6a213897a59b9e644977cd07e6 <63b02a9409cb5180398491b093e48bcb5315f5fb; version=bea67dcc5eea0f6a213897a59b9e644977cd07e6 <6a4196d19f477524d2f92adca90fc1fbe9a0420a; version=bea67dcc5eea0f6a213897a59b9e644977cd07e6 <818416fef38759f23210de449663cd9d7e293d39; version=bea67dcc5eea0f6a213897a59b9e644977cd07e6 <b415c00bf23df577a4a95673d00ae76687bcc1d4

Published CVSS scores

4.7Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Endpoint Denial of Service: Application or System Exploitation

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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