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CVE-2024-26843

efi: runtime: Fix potential overflow of soft-reserved region size

MEDIUM
6
CVSS Score
Published: April 17, 2024 at 10:10 AM UTC
Updated: June 17, 2026 at 07:18 AM UTC
2 products affected across 2 vendorsLinux KernelDebian Linux

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Severity
MEDIUM6
Exploit prediction
EPSS 0.2%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: efi: runtime: Fix potential overflow of soft-reserved region size md_size will have been narrowed if we have >= 4GB worth of pages in a soft-reserved region.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux· Debiandrupal
95%
10.0
Linux Kernel· Linux
95%
v < 5.10.2115.11 ≤ v < 5.15.1505.16 ≤ v < 6.1.805.5 ≤ v < 5.10.2115.5 ≤ v < 5.15.1505.5 ≤ v < 6.1.805.5 ≤ v < 6.6.195.5 ≤ v < 6.7.75.5 ≤ v < 6.86.2 ≤ v < 6.6.196.7 ≤ v < 6.7.716993c0f0a43213e23666ea40e9163887f593ac76.8 rc16.8 rc26.8 rc3
Vendor states this is fixed in 156cb12ffdcf33883304f0db645e1eadae712fe0 (fixed)
Vendor states this is fixed in 4aa36b62c3eaa869860bf78b1146e9f2b5f782a9 (fixed)
Vendor states this is fixed in 4fff3d735baea104017f2e3c245e27cdc79f2426 (fixed)
Vendor states this is fixed in 700c3f642c32721f246e09d3a9511acf40ae42be (fixed)
Vendor states this is fixed in cf3d6813601fe496de7f023435e31bfffa74ae70 (fixed)
Vendor states this is fixed in de1034b38a346ef6be25fe8792f5d1e0684d5ff4 (fixed)
Vendor states this is fixed in 5.10.211 (unaffected)
Vendor states this is fixed in 5.15.150 (unaffected)
Vendor states this is fixed in 5.5 (unaffected)
Vendor states this is fixed in 6.1.80 (unaffected)
Vendor states this is fixed in 6.6.19 (unaffected)
Vendor states this is fixed in 6.7.7 (unaffected)
Vendor states this is fixed in 6.8 (unaffected)

References (7)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/156cb12ffdcf33883304f0db645e1eadae712fe0
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/4aa36b62c3eaa869860bf78b1146e9f2b5f782a9
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/4fff3d735baea104017f2e3c245e27cdc79f2426
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/700c3f642c32721f246e09d3a9511acf40ae42be
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/cf3d6813601fe496de7f023435e31bfffa74ae70
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/de1034b38a346ef6be25fe8792f5d1e0684d5ff4
Mailing List
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6MEDIUMCISA-ADP
Attack Vector
LOCAL
Complexity
LOW
Privileges
HIGH
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-787

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