CVE-2026-46268
- Source
- https://cve.org/CVERecord?id=CVE-2026-46268
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-46268.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2026-46268
- Downstream
- Published
- 2026-06-03T15:50:10.101Z
- Modified
- 2026-06-18T03:56:55.510296362Z
- Summary
- PCI/P2PDMA: Fix p2pmem_alloc_mmap() warning condition
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
PCI/P2PDMA: Fix p2pmemallocmmap() warning condition
Commit b7e282378773 has already changed the initial page refcount of p2pdma page from one to zero, however, in p2pmemallocmmap() it uses "VMWARNONONCEPAGE(!pagerefcount(page))" to assert the initial page refcount should not be zero and the following will be reported when CONFIGDEBUGVM is enabled:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x380400000 flags: 0x20000000002000(reserved|node=0|zone=4) raw: 0020000000002000 ff1100015e3ab440 0000000000000000 0000000000000000 raw: 0000000000000000 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: VMWARNONONCEPAGE(!pagerefcount(page)) ------------[ cut here ]------------ WARNING: CPU: 5 PID: 449 at drivers/pci/p2pdma.c:240 p2pmemallocmmap+0x83a/0xa60
Fix by using "pagerefcount(page)" as the assertion condition.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46268.json", "cna_assigner": "Linux" }- References
-
- https://git.kernel.org/stable/c/9b69243983fb2f4d4d1f4ef0989bc1296547dc2c
- https://git.kernel.org/stable/c/cb500023a75246f60b79af9f7321d6e75330c5b5
- https://git.kernel.org/stable/c/eb9aa9f8010465d927864f5a35bdc5604b0ff51a
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46268.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-46268
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git