| 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-2021-47049: Drivers: hv: vmbus: Use after free in __vmbus_open() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| Drivers: hv: vmbus: Use after free in __vmbus_open() |
| |
| The "open_info" variable is added to the &vmbus_connection.chn_msg_list, |
| but the error handling frees "open_info" without removing it from the |
| list. This will result in a use after free. First remove it from the |
| list, and then free it. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47049 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.14 with commit 6f3d791f300618caf82a2be0c27456edd76d5164 and fixed in 5.10.37 with commit d5c7b42c9f56ca46b286daa537d181bd7f69214f |
| Issue introduced in 4.14 with commit 6f3d791f300618caf82a2be0c27456edd76d5164 and fixed in 5.11.21 with commit f37dd5d1b5d38a79a4f7b8dd7bbb705505f05560 |
| Issue introduced in 4.14 with commit 6f3d791f300618caf82a2be0c27456edd76d5164 and fixed in 5.12.4 with commit 2728f289b3270b0e273292b46c534421a33bbfd5 |
| Issue introduced in 4.14 with commit 6f3d791f300618caf82a2be0c27456edd76d5164 and fixed in 5.13 with commit 3e9bf43f7f7a46f21ec071cb47be92d0874c48da |
| Issue introduced in 4.13.9 with commit 6b32d45bd59982751beb8220e442b40b2706647f |
| |
| 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-2021-47049 |
| 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/hv/channel.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/d5c7b42c9f56ca46b286daa537d181bd7f69214f |
| https://git.kernel.org/stable/c/f37dd5d1b5d38a79a4f7b8dd7bbb705505f05560 |
| https://git.kernel.org/stable/c/2728f289b3270b0e273292b46c534421a33bbfd5 |
| https://git.kernel.org/stable/c/3e9bf43f7f7a46f21ec071cb47be92d0874c48da |
