CVE-2026-23156: Linux Kernel

High severity, CVSS 7.8. EPSS: 0.1% chance of exploitation in the next 30 days.

In the Linux kernel, the following vulnerability has been resolved: efivarfs: fix error propagation in efivar_entry_get() efivar_entry_get() always returns success even if the underlying __efivar_entry_get() fails, masking errors. This may result in uninitialized heap memory being copied to userspace in the efivarfs_file_read() path. Fix it by returning the error from __efivar_entry_get().

Affected products

• Linux Linux Kernel: from 6.0, before 6.1.162 (fixed in 6.1.162); from 6.2, before 6.6.123 (fixed in 6.6.123); from 6.7, before 6.12.69 (fixed in 6.12.69); from 6.13, before 6.18.9 (fixed in 6.18.9); version 6.19 only

Published 2026-02-14. Last modified 2026-06-17.