What’s Vulnerable › Vulnerabilities

CVE-2024-26843: efi: runtime: Fix potential overflow of soft-reserved region size

• Severity: medium (CVSS 6.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-04-17 · updated 2026-06-17
• Weakness: CWE-787

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 products

• Debian Linux: 10.0
• Linux kernel: before 5.10.211; from 5.11 before 5.15.150; from 5.16 before 6.1.80; from 6.2 before 6.6.19; from 6.7 before 6.7.7; 6.8-rc1, 6.8-rc2, 6.8-rc3 — fixed in 5.10.211, 5.15.150, 6.1.80, 6.6.19, 6.7.7

How to fix

Upgrade to a fixed version: Linux kernel 5.10.211, 5.15.150, 6.1.80, 6.6.19. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/156cb12ffdcf33883304f0db645e1eadae712fe0
• https://git.kernel.org/stable/c/4aa36b62c3eaa869860bf78b1146e9f2b5f782a9
• https://git.kernel.org/stable/c/4fff3d735baea104017f2e3c245e27cdc79f2426
• https://git.kernel.org/stable/c/700c3f642c32721f246e09d3a9511acf40ae42be
• https://git.kernel.org/stable/c/cf3d6813601fe496de7f023435e31bfffa74ae70
• https://git.kernel.org/stable/c/de1034b38a346ef6be25fe8792f5d1e0684d5ff4
• https://git.kernel.org/stable/c/156cb12ffdcf33883304f0db645e1eadae712fe0
• https://git.kernel.org/stable/c/4aa36b62c3eaa869860bf78b1146e9f2b5f782a9
• https://git.kernel.org/stable/c/4fff3d735baea104017f2e3c245e27cdc79f2426
• https://git.kernel.org/stable/c/700c3f642c32721f246e09d3a9511acf40ae42be
• https://git.kernel.org/stable/c/cf3d6813601fe496de7f023435e31bfffa74ae70
• https://git.kernel.org/stable/c/de1034b38a346ef6be25fe8792f5d1e0684d5ff4

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