| 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-2024-50080: ublk: don't allow user copy for unprivileged device |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ublk: don't allow user copy for unprivileged device |
| |
| UBLK_F_USER_COPY requires userspace to call write() on ublk char |
| device for filling request buffer, and unprivileged device can't |
| be trusted. |
| |
| So don't allow user copy for unprivileged device. |
| |
| The Linux kernel CVE team has assigned CVE-2024-50080 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.5 with commit 1172d5b8beca6b899deb9f7f2850e7e47ec16198 and fixed in 6.6.58 with commit 6414ab5c9c9c068eca6dc4fd3a036bc4b83164dc |
| Issue introduced in 6.5 with commit 1172d5b8beca6b899deb9f7f2850e7e47ec16198 and fixed in 6.11.5 with commit 8f3d5686a2409877c5e8e2540774d24ed2b4a4ce |
| Issue introduced in 6.5 with commit 1172d5b8beca6b899deb9f7f2850e7e47ec16198 and fixed in 6.12 with commit 42aafd8b48adac1c3b20fe5892b1b91b80c1a1e6 |
| |
| 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-2024-50080 |
| 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/block/ublk_drv.c |
| include/uapi/linux/ublk_cmd.h |
| |
| |
| 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/6414ab5c9c9c068eca6dc4fd3a036bc4b83164dc |
| https://git.kernel.org/stable/c/8f3d5686a2409877c5e8e2540774d24ed2b4a4ce |
| https://git.kernel.org/stable/c/42aafd8b48adac1c3b20fe5892b1b91b80c1a1e6 |
