DEBIAN-CVE-2025-68293
Record from OSV · Published December 16, 2025
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.
Fixed versions
Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.
| Package | Ecosystem | Fixed in |
|---|---|---|
| linux | Debian:14 | 6.17.11-1 |
| linux | Debian:13 | 6.12.63-1 |
Affected products
| Vendor | Product | Versions |
|---|---|---|
| Debian:14 | linux | 0, 6.12.100-1, 6.12.101-1 |
| Debian:13 | linux | 0, 6.12.38-1, 6.12.41-1 |
Timeline
- Dec 16, 2025 CVE Published
- Oct 15, 2026 CVE Updated
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