CVE-2026-19574 Linux ARM64 - Broken Access Control

The ARM64 Linux kernel contains a broken access control vulnerability in arch_mem_domain_init() due to ASID reuse after wraparound, letting user-mode threads bypass memory domain isolation and access other domains' memory, exploit requires creating more than 255 memory domains.

CVSS base score 7.0 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.10% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Broken Access Control, Information Disclosure, Data Tampering
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
9 October 2026
Updated
15 October 2026
Weakness
CWE-284

Vendor fix

Update to a kernel version that includes the fix scanning live domains and preventing ASID reuse, or latest available version

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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