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.

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().

EPSS: 0.001 (2.2th percentile) — read the EPSS interpretation.

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.

Affected products

Linux — versions 2d82e6227ea189c0589e7383a36616ac2a2d248c, 6.0, 0
Linux Linux_kernel — versions 6.19

References

416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)
416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Patch)

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.