Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2026-23354

Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
25/03/2026
Last modified:
24/04/2026

Description

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> x86/fred: Correct speculative safety in fred_extint()<br /> <br /> array_index_nospec() is no use if the result gets spilled to the stack, as<br /> it makes the believed safe-under-speculation value subject to memory<br /> predictions.<br /> <br /> For all practical purposes, this means array_index_nospec() must be used in<br /> the expression that accesses the array.<br /> <br /> As the code currently stands, it&amp;#39;s the wrong side of irqentry_enter(), and<br /> &amp;#39;index&amp;#39; is put into %ebp across the function call.<br /> <br /> Remove the index variable and reposition array_index_nospec(), so it&amp;#39;s<br /> calculated immediately before the array access.

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
7.80
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.9.1 (including) 6.12.77 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.13 (including) 6.18.17 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.19 (including) 6.19.7 (excluding)
cpe:2.3:o:linux:linux_kernel:6.9:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools