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CVE-2026-23156
efivarfs: fix error propagation in efivar_entry_get()
Description

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().

INFO

Published Date :

Feb. 14, 2026, 4:15 p.m.

Last Modified :

Feb. 14, 2026, 4:15 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products

The following products are affected by CVE-2026-23156 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Solution
Apply kernel patches to fix error handling in efivar_entry_get.
  • Update the Linux kernel to the latest stable version.
  • Apply the specific patch for efivarfs error handling.
  • Recompile and install the kernel.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-23156.

URL Resource
https://git.kernel.org/stable/c/3960f1754664661a970dc9ebbab44ff93a0b4c42
https://git.kernel.org/stable/c/4b22ec1685ce1fc0d862dcda3225d852fb107995
https://git.kernel.org/stable/c/510a16f1c5c1690b33504052bc13fbc2772c23f8
https://git.kernel.org/stable/c/89b8ca709eeeabcc11ebba64806677873a2787a8
https://git.kernel.org/stable/c/e4e15a0a4403c96d9898d8398f0640421df9cb16
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-23156 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-23156 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-23156 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-23156 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Feb. 14, 2026

    Action Type Old Value New Value
    Added Description 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().
    Added Reference https://git.kernel.org/stable/c/3960f1754664661a970dc9ebbab44ff93a0b4c42
    Added Reference https://git.kernel.org/stable/c/4b22ec1685ce1fc0d862dcda3225d852fb107995
    Added Reference https://git.kernel.org/stable/c/510a16f1c5c1690b33504052bc13fbc2772c23f8
    Added Reference https://git.kernel.org/stable/c/89b8ca709eeeabcc11ebba64806677873a2787a8
    Added Reference https://git.kernel.org/stable/c/e4e15a0a4403c96d9898d8398f0640421df9cb16
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
No CVSS metrics available for this vulnerability.