{"id":"DEBIAN-CVE-2023-52910","details":"In the Linux kernel, the following vulnerability has been resolved:  iommu/iova: Fix alloc iova overflows issue  In __alloc_and_insert_iova_range, there is an issue that retry_pfn overflows. The value of iovad-\u003eanchor.pfn_hi is ~0UL, then when iovad-\u003ecached_node is iovad-\u003eanchor, curr_iova-\u003epfn_hi + 1 will overflow. As a result, if the retry logic is executed, low_pfn is updated to 0, and then new_pfn \u003c low_pfn returns false to make the allocation successful.  This issue occurs in the following two situations: 1. The first iova size exceeds the domain size. When initializing iova domain, iovad-\u003ecached_node is assigned as iovad-\u003eanchor. For example, the iova domain size is 10M, start_pfn is 0x1_F000_0000, and the iova size allocated for the first time is 11M. The following is the log information, new-\u003epfn_lo is smaller than iovad-\u003ecached_node.  Example log as follows: [  223.798112][T1705487] sh: [name:iova&]__alloc_and_insert_iova_range start_pfn:0x1f0000,retry_pfn:0x0,size:0xb00,limit_pfn:0x1f0a00 [  223.799590][T1705487] sh: [name:iova&]__alloc_and_insert_iova_range success start_pfn:0x1f0000,new-\u003epfn_lo:0x1efe00,new-\u003epfn_hi:0x1f08ff  2. The node with the largest iova-\u003epfn_lo value in the iova domain is deleted, iovad-\u003ecached_node will be updated to iovad-\u003eanchor, and then the alloc iova size exceeds the maximum iova size that can be allocated in the domain.  After judging that retry_pfn is less than limit_pfn, call retry_pfn+1 to fix the overflow issue.","modified":"2026-09-15T09:02:49.277702745Z","published":"2024-08-21T07:15:06.910Z","upstream":["CVE-2023-52910"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-52910"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-52910.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-52910.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-52910.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:N/I:N/A:H"}]}