Bug 2439951 (CVE-2026-23156) - CVE-2026-23156 kernel: Linux kernel: Information disclosure in efivarfs via incorrect error propagation
Summary: CVE-2026-23156 kernel: Linux kernel: Information disclosure in efivarfs via i...
Keywords:
Status: NEW
Alias: CVE-2026-23156
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-02-14 17:04 UTC by OSIDB Bzimport
Modified: 2026-03-09 09:40 UTC (History)
0 users

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:4012 0 None None None 2026-03-09 09:40:29 UTC

Description OSIDB Bzimport 2026-02-14 17:04:37 UTC 
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().
Comment 1 TEJ RATHI 2026-02-16 06:12:04 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026021416-CVE-2026-23156-b2f4@gregkh/T
Comment 4 errata-xmlrpc 2026-03-09 09:40:28 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:4012 https://access.redhat.com/errata/RHSA-2026:4012
Note You need to log in before you can comment on or make changes to this bug.