From bippy-d175d3acf727 Mon Sep 17 00:00:00 2001 From: Greg Kroah-Hartman To: Reply-to: , Subject: CVE-2023-52801: iommufd: Fix missing update of domains_itree after splitting iopt_area Description =========== In the Linux kernel, the following vulnerability has been resolved: iommufd: Fix missing update of domains_itree after splitting iopt_area In iopt_area_split(), if the original iopt_area has filled a domain and is linked to domains_itree, pages_nodes have to be properly reinserted. Otherwise the domains_itree becomes corrupted and we will UAF. The Linux kernel CVE team has assigned CVE-2023-52801 to this issue. Affected and fixed versions =========================== Issue introduced in 6.2 with commit 51fe6141f0f6 and fixed in 6.5.13 with commit 836db2e7e456 Issue introduced in 6.2 with commit 51fe6141f0f6 and fixed in 6.6.3 with commit fcb32111f01d Issue introduced in 6.2 with commit 51fe6141f0f6 and fixed in 6.7 with commit e7250ab7ca49 Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2023-52801 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: drivers/iommu/iommufd/io_pagetable.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/836db2e7e4565d8218923b3552304a1637e2f28d https://git.kernel.org/stable/c/fcb32111f01ddf3cbd04644cde1773428e31de6a https://git.kernel.org/stable/c/e7250ab7ca4998fe026f2149805b03e09dc32498