CVE-2026-90043 Linux kernel zram - Broken Access Control

Linux kernel zram contains a broken access control caused by incorrect slot lock bit position on big-endian 64-bit systems, letting concurrent CPUs cause lock state corruption, exploit requires specific architecture and configuration.

CVSS base score 7.8 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.17% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Broken Access Control
Impact
Denial Of Service, Data Tampering
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
16 September 2026
Updated
15 October 2026

Vendor fix

Update to the fixed Linux kernel version that corrects slot lock bit position on big-endian 64-bit systems.

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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