Vulnerability in Linux

CVE-2026-23156

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().

Published · last modified .

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.001 (1.9th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 1.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2026-23156: held from 0.001 to 0.001.

EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: +0.000

Affected products

  • Linux — versions 2d82e6227ea189c0589e7383a36616ac2a2d248c, 6.0, 0
  • Linux Kernel — versions 6.19

References

Frequently asked questions

What is CVE-2026-23156?
CVE-2026-23156 is a high-severity vulnerability in Linux. CVSS score: 7.8/10. Published 2026-02-14.
How severe is CVE-2026-23156?
High severity. CVSS v3 base score is 7.8 out of 10.