CVE-2026-98373mm/hugetlb: preserve mremap address delta when skipping page tables
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: mm/hugetlb: preserve mremap address delta when skipping page tables move_hugetlb_page_tables() optimizes mremap() by advancing to the last entry in the page table when the source page table does not exist, either initially or after unsharing a PMD table. The common loop increment then steps to the first entry in the next page table. However, the code advances both the source and destination addresses to the last entries in their respective page tables, which is wrong. The destination address must be advanced only by the same amount as the source address. If the source and destination offsets within their page tables differ, the destination address can be advanced too far, causing follow-up issues. Fix this by advancing the destination address by the source advance distance. With a reproducer, we were able to trigger a kernel panic on x86-64. With this fix in place, we can no longer reproduce the issue.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 7, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from e95a9851787bbb3cd4deb40fe8bab03f731852d1 before 7a96b0f657c8d799ea5b8e02fc9ec7cca0e6e7ff; from e95a9851787bbb3cd4deb40fe8bab03f731852d1 before 850cc4a84b36a0062dcd0391acd2450e20ab0767; from e95a9851787bbb3cd4deb40fe8bab03f731852d1 before 480a39b0a12c977ed6e755f3d12a23424c57d11f; from e95a9851787bbb3cd4deb40fe8bab03f731852d1 before 9bdad082d44bdcf93716973dcba6be77e8a06e7b | CNA record |
References
- https://git.kernel.org/stable/c/7a96b0f657c8d799ea5b8e02fc9ec7cca0e6e7ff
- https://git.kernel.org/stable/c/850cc4a84b36a0062dcd0391acd2450e20ab0767
- https://git.kernel.org/stable/c/480a39b0a12c977ed6e755f3d12a23424c57d11f
- https://git.kernel.org/stable/c/9bdad082d44bdcf93716973dcba6be77e8a06e7b
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.