CVE-2026-53354

Local privilege escalation via delayed stale-mapping writes

Published Jul 1, 2026 · Updated Jul 1, 2026

Memory corruption in the arm64 TLB-flush path in Linux Kernel allows local users to gain kernel or hypervisor privileges. On affected Arm CPUs, a broadcast TLBI;DSB can complete before an in-flight write through the invalidated mapping becomes globally visible. Local code must repeatedly race concurrent stores against translation invalidation; a late write can corrupt memory after its page is reallocated to another security context.

CVSS severity8.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory corruption in the arm64 TLB-flush path in Linux Kernel allows local users to gain kernel or hypervisor privileges. On affected Arm CPUs, a broadcast TLBI;DSB can complete before an in-flight write through the invalidated mapping becomes globally visible. Local code must repeatedly race concurrent stores against translation invalidation; a late write can corrupt memory after its page is reallocated to another security context.

The record

CVE
CVE-2026-53354
Published
Jul 1, 2026
Updated
Jul 1, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jul 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 1, 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=0 <5.10.259
  2. Affected versionversion=0 <5.15.210
  3. Affected versionversion=0 <6.1.176
  4. Affected versionversion=0 <6.12.94
  5. Affected versionversion=0 <6.18.36
  6. Affected versionversion=0 <6.6.143
  7. Affected versionversion=0 <7.0.13
  8. Affected versionversion=0 <7.1.1
  9. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1268c64e2bcb6e968152990e87bd10c440fcc9c0
  10. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1b47b1e1d8675fdf5f6e11e7fa19c704d8c6f5cd
  11. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4e7c80742e6dada9f8b9ad63f3a49c03af07ecb8
  12. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7c3ad9365079e716b57d2363d3081ee7680cc18e
  13. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8364384ae82fbffdf8968abaac3455ed854da18d
  14. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <925058203229403008d77a52b1e63e2ae5f4a3cf
  15. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cfd391e74134db664feb499d43af286380b10ba8
  16. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d4fd4282204044fdedd1e42abbe70a9206f74ec0
  17. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e717a4d08779f1a28d6e0275e75040b12c33c753

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=0 <5.10.259; version=0 <5.15.210; version=0 <6.1.176; version=0 <6.12.94; version=0 <6.18.36; version=0 <6.6.143; version=0 <7.0.13; version=0 <7.1.1; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1268c64e2bcb6e968152990e87bd10c440fcc9c0; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1b47b1e1d8675fdf5f6e11e7fa19c704d8c6f5cd; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <4e7c80742e6dada9f8b9ad63f3a49c03af07ecb8; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7c3ad9365079e716b57d2363d3081ee7680cc18e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <8364384ae82fbffdf8968abaac3455ed854da18d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <925058203229403008d77a52b1e63e2ae5f4a3cf; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <cfd391e74134db664feb499d43af286380b10ba8; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d4fd4282204044fdedd1e42abbe70a9206f74ec0; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e717a4d08779f1a28d6e0275e75040b12c33c753

Published CVSS scores

8.8Linux kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1068Exploitation for Privilege Escalation

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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