| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-21770: iommu: Fix potential memory leak in iopf_queue_remove_device() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| iommu: Fix potential memory leak in iopf_queue_remove_device() |
| |
| The iopf_queue_remove_device() helper removes a device from the per-iommu |
| iopf queue when PRI is disabled on the device. It responds to all |
| outstanding iopf's with an IOMMU_PAGE_RESP_INVALID code and detaches the |
| device from the queue. |
| |
| However, it fails to release the group structure that represents a group |
| of iopf's awaiting for a response after responding to the hardware. This |
| can cause a memory leak if iopf_queue_remove_device() is called with |
| pending iopf's. |
| |
| Fix it by calling iopf_free_group() after the iopf group is responded. |
| |
| The Linux kernel CVE team has assigned CVE-2025-21770 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.9 with commit 19911232713573a2ebea84a25bd4d71d024ed86b and fixed in 6.12.16 with commit db60d2d896a17decd58d143eef92cf22eb0a0176 |
| Issue introduced in 6.9 with commit 19911232713573a2ebea84a25bd4d71d024ed86b and fixed in 6.13.4 with commit 90d5429cd2921ca2714684ed525898d431bb9283 |
| Issue introduced in 6.9 with commit 19911232713573a2ebea84a25bd4d71d024ed86b and fixed in 6.14 with commit 9759ae2cee7cd42b95f1c48aa3749bd02b5ddb08 |
| |
| 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-2025-21770 |
| 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/io-pgfault.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/db60d2d896a17decd58d143eef92cf22eb0a0176 |
| https://git.kernel.org/stable/c/90d5429cd2921ca2714684ed525898d431bb9283 |
| https://git.kernel.org/stable/c/9759ae2cee7cd42b95f1c48aa3749bd02b5ddb08 |
