CVE-2026-93147 Linux Kernel - Undefined

Linux kernel contains a vulnerability in s390/bpf where the ly instruction loads a 32-bit cpu_nr into a 64-bit register without zeroing upper bits, letting attackers cause potential data corruption, exploit requires crafted BPF programs.

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

Details

Type
Undefined
Impact
Privilege Escalation, Denial Of Service
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Published
17 September 2026
Updated
15 October 2026

Vendor fix

Update to the latest Linux kernel version with the s390/bpf ly instruction replaced by llgf.

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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