What’s Vulnerable › Vulnerabilities

CVE-2026-98506: mm/hugetlb: do not dissolve gigantic pages without runtime support

• Severity: unknown
• 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: 2026-10-18 · updated 2026-10-19

Description

In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: do not dissolve gigantic pages without runtime support dissolve_free_hugetlb_folio() doesn't check hstate_is_gigantic_no_runtime(h) though remove_hugetlb_folio()/ update_and_free_hugetlb_folio() silently bail for such folios, so it frees a still-listed folio and, on vmemmap restore failure, the add_hugetlb_folio() rollback corrupts the free list.

Affected products

• Linux kernel: 5.13 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/443628f755b35bf45044f68b970b65cd531c42fd
• https://git.kernel.org/stable/c/a363c62a653cc8b3e21da9545fa4e028ef50f9c3
• https://git.kernel.org/stable/c/ccf96a4b8626a001c13c5836d8357f31c57bbd8e
• https://git.kernel.org/stable/c/ddc1055b557506a6ea8930dfbd8d1555d6a3f01e

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