Vulnerability Details CVE-2026-46013
In the Linux kernel, the following vulnerability has been resolved:
mm/memfd_luo: fix physical address conversion in put_folios cleanup
In memfd_luo_retrieve_folios()'s put_folios cleanup path:
1. kho_restore_folio() expects a phys_addr_t (physical address) but
receives a raw PFN (pfolio->pfn). This causes kho_restore_page() to
check the wrong physical address (pfn << PAGE_SHIFT instead of the
actual physical address).
2. This loop lacks the !pfolio->pfn check that exists in the main
retrieval loop and memfd_luo_discard_folios(), which could
incorrectly process sparse file holes where pfn=0.
Fix by converting PFN to physical address with PFN_PHYS() and adding
the !pfolio->pfn check, matching the pattern used elsewhere in this file.
This issue was identified by the AI review.
https://sashiko.dev/#/patchset/20260323110747.193569-1-duanchenghao@kylinos.cn
Exploit prediction scoring system (EPSS) score
EPSS Score 0.002
EPSS Ranking 5.0%
CVSS Severity
CVSS v3 Score 5.5
References
Products affected by CVE-2026-46013
-
cpe:2.3:o:linux:linux_kernel:6.19
-
cpe:2.3:o:linux:linux_kernel:6.19.1
-
cpe:2.3:o:linux:linux_kernel:6.19.10
-
cpe:2.3:o:linux:linux_kernel:6.19.11
-
cpe:2.3:o:linux:linux_kernel:6.19.12
-
cpe:2.3:o:linux:linux_kernel:6.19.13
-
cpe:2.3:o:linux:linux_kernel:6.19.14
-
cpe:2.3:o:linux:linux_kernel:6.19.3
-
cpe:2.3:o:linux:linux_kernel:6.19.4
-
cpe:2.3:o:linux:linux_kernel:6.19.6
-
cpe:2.3:o:linux:linux_kernel:6.19.7
-
cpe:2.3:o:linux:linux_kernel:6.19.8
-
cpe:2.3:o:linux:linux_kernel:6.19.9
-
cpe:2.3:o:linux:linux_kernel:7.0
-
cpe:2.3:o:linux:linux_kernel:7.0.1
-
cpe:2.3:o:linux:linux_kernel:7.0.2
-
cpe:2.3:o:linux:linux_kernel:7.0.3