{"id":"DEBIAN-CVE-2024-56669","details":"In the Linux kernel, the following vulnerability has been resolved:  iommu/vt-d: Remove cache tags before disabling ATS  The current implementation removes cache tags after disabling ATS, leading to potential memory leaks and kernel crashes. Specifically, CACHE_TAG_DEVTLB type cache tags may still remain in the list even after the domain is freed, causing a use-after-free condition.  This issue really shows up when multiple VFs from different PFs passed through to a single user-space process via vfio-pci. In such cases, the kernel may crash with kernel messages like:   BUG: kernel NULL pointer dereference, address: 0000000000000014  PGD 19036a067 P4D 1940a3067 PUD 136c9b067 PMD 0  Oops: Oops: 0000 [#1] PREEMPT SMP NOPTI  CPU: 74 UID: 0 PID: 3183 Comm: testCli Not tainted 6.11.9 #2  RIP: 0010:cache_tag_flush_range+0x9b/0x250  Call Trace:   \u003cTASK\u003e   ? __die+0x1f/0x60   ? page_fault_oops+0x163/0x590   ? exc_page_fault+0x72/0x190   ? asm_exc_page_fault+0x22/0x30   ? cache_tag_flush_range+0x9b/0x250   ? cache_tag_flush_range+0x5d/0x250   intel_iommu_tlb_sync+0x29/0x40   intel_iommu_unmap_pages+0xfe/0x160   __iommu_unmap+0xd8/0x1a0   vfio_unmap_unpin+0x182/0x340 [vfio_iommu_type1]   vfio_remove_dma+0x2a/0xb0 [vfio_iommu_type1]   vfio_iommu_type1_ioctl+0xafa/0x18e0 [vfio_iommu_type1]  Move cache_tag_unassign_domain() before iommu_disable_pci_caps() to fix it.","modified":"2026-09-15T09:03:17.204492594Z","published":"2024-12-27T15:15:26.797Z","upstream":["CVE-2024-56669"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2024-56669"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-56669.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.12.6-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2024-56669.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}