CVE-2026-90347 Linux Kernel arm64 - Authentication Bypass

Linux kernel arm64 contains a broken authentication caused by incomplete synchronization of 'orig_x0' with 'x0' during syscall entry tracing, letting ptrace tracers manipulate syscall arguments bypassing seccomp and audit checks, exploit requires ptrace capability.

CVSS base score 8.4 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.16% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Privilege Escalation
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:N
Published
17 September 2026
Updated
15 October 2026

Vendor fix

Update to the Linux kernel version containing commit e057b9477232 or later.

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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