CVE-2026-23156

HighCVSS 7.8/10Last modified Jun 17, 2026

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().

Metrics

CVSS 3.1 7.8/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected software

VendorProductVersions
LinuxLinux>= 2d82e6227ea189c0589e7383a36616ac2a2d248c, < 3960f1754664661a970dc9ebbab44ff93a0b4c42; >= 2d82e6227ea189c0589e7383a36616ac2a2d248c, < 510a16f1c5c1690b33504052bc13fbc2772c23f8; >= 2d82e6227ea189c0589e7383a36616ac2a2d248c, < 89b8ca709eeeabcc11ebba64806677873a2787a8; >= 2d82e6227ea189c0589e7383a36616ac2a2d248c, < e4e15a0a4403c96d9898d8398f0640421df9cb16; >= 2d82e6227ea189c0589e7383a36616ac2a2d248c, < 4b22ec1685ce1fc0d862dcda3225d852fb107995
LinuxLinux6.0

References

Timeline

Published
Feb 14, 2026
Last modified
Jun 17, 2026
NVD status
Analyzed

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CVE-2026-23156: High severity, CVSS 7.8 | Vulnix