CVE-2026-99016 Linux Kernel - Broken Access Control

Linux kernel riscv futex contains a privilege escalation caused by improper handling of tagged user pointers in atomic operations, letting unprivileged attackers perform atomic read-modify-write on arbitrary kernel addresses, exploit requires tagged address ABI enabled.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Required
EPSS
0.21% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Privilege Escalation, Data Tampering, Information Disclosure
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
23 October 2026
Updated
25 October 2026

Vendor fix

Update to the latest Linux kernel version containing the fix for riscv futex pointer untagging.

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

← All CVEs