CVE-2025-68293mm/huge_memory: fix NULL pointer deference when splitting folio
Updated under an hour ago ()
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In the Linux kernel, the following vulnerability has been resolved: mm/huge_memory: fix NULL pointer deference when splitting folio Commit c010d47f107f ("mm: thp: split huge page to any lower order pages") introduced an early check on the folio's order via mapping->flags before proceeding with the split work. This check introduced a bug: for shmem folios in the swap cache and truncated folios, the mapping pointer can be NULL. Accessing mapping->flags in this state leads directly to a NULL pointer dereference. This commit fixes the issue by moving the check for mapping != NULL before any attempt to access mapping->flags.
- 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
- Deferred
- Record last updated
- May 11, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from c010d47f107f609b9f4d6a103b6dfc53889049e9 before 592db83615a9f0164472ec789c2ed34ad35f732f; from c010d47f107f609b9f4d6a103b6dfc53889049e9 before d1b83fbacd4397a1d2f8c6b13427a8636ae2b307; from c010d47f107f609b9f4d6a103b6dfc53889049e9 before cff47b9e39a6abf03dde5f4f156f841b0c54bba0 | CNA record |
References
- https://git.kernel.org/stable/c/592db83615a9f0164472ec789c2ed34ad35f732f
- https://git.kernel.org/stable/c/d1b83fbacd4397a1d2f8c6b13427a8636ae2b307
- https://git.kernel.org/stable/c/cff47b9e39a6abf03dde5f4f156f841b0c54bba0
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.