CVE-2025-68293
- Source
- https://cve.org/CVERecord?id=CVE-2025-68293
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-68293.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-68293
- Downstream
- Related
- Published
- 2025-12-16T15:06:13.428Z
- Modified
- 2026-03-12T02:18:33.314823Z
- Summary
- mm/huge_memory: fix NULL pointer deference when splitting folio
- Details
-
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.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68293.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/592db83615a9f0164472ec789c2ed34ad35f732f
- https://git.kernel.org/stable/c/cff47b9e39a6abf03dde5f4f156f841b0c54bba0
- https://git.kernel.org/stable/c/d1b83fbacd4397a1d2f8c6b13427a8636ae2b307
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68293.json
- https://nvd.nist.gov/vuln/detail/CVE-2025-68293