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Date: Mon, 25 Mar 2024 10:16:53 +0100 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-cve-announce@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org> Subject: CVE-2021-47177: iommu/vt-d: Fix sysfs leak in alloc_iommu() Description =========== In the Linux kernel, the following vulnerability has been resolved: iommu/vt-d: Fix sysfs leak in alloc_iommu() iommu_device_sysfs_add() is called before, so is has to be cleaned on subsequent errors. The Linux kernel CVE team has assigned CVE-2021-47177 to this issue. Affected and fixed versions =========================== Issue introduced in 4.11 with commit 39ab9555c2411 and fixed in 4.14.235 with commit 22da9f497838 Issue introduced in 4.11 with commit 39ab9555c2411 and fixed in 4.19.193 with commit 2ec5e9bb6b05 Issue introduced in 4.11 with commit 39ab9555c2411 and fixed in 5.4.124 with commit 044bbe8b92ab Issue introduced in 4.11 with commit 39ab9555c2411 and fixed in 5.10.42 with commit f01134321d04 Issue introduced in 4.11 with commit 39ab9555c2411 and fixed in 5.12.9 with commit ca466561eef3 Issue introduced in 4.11 with commit 39ab9555c2411 and fixed in 5.13 with commit 0ee74d5a4863 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-2021-47177 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/intel/dmar.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/22da9f4978381a99f1abaeaf6c9b83be6ab5ddd8 https://git.kernel.org/stable/c/2ec5e9bb6b0560c90d315559c28a99723c80b996 https://git.kernel.org/stable/c/044bbe8b92ab4e542de7f6c93c88ea65cccd8e29 https://git.kernel.org/stable/c/f01134321d04f47c718bb41b799bcdeda27873d2 https://git.kernel.org/stable/c/ca466561eef36d1ec657673e3944eb6340bddb5b https://git.kernel.org/stable/c/0ee74d5a48635c848c20f152d0d488bf84641304
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