| 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-2023-52493: bus: mhi: host: Drop chan lock before queuing buffers |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| bus: mhi: host: Drop chan lock before queuing buffers |
| |
| Ensure read and write locks for the channel are not taken in succession by |
| dropping the read lock from parse_xfer_event() such that a callback given |
| to client can potentially queue buffers and acquire the write lock in that |
| process. Any queueing of buffers should be done without channel read lock |
| acquired as it can result in multiple locks and a soft lockup. |
| |
| [mani: added fixes tag and cc'ed stable] |
| |
| The Linux kernel CVE team has assigned CVE-2023-52493 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.7 with commit 1d3173a3bae7039b765a0956e3e4bf846dbaacb8 and fixed in 5.10.210 with commit 20a6dea2d1c68d4e03c6bb50bc12e72e226b5c0e |
| Issue introduced in 5.7 with commit 1d3173a3bae7039b765a0956e3e4bf846dbaacb8 and fixed in 5.15.149 with commit 6e4c84316e2b70709f0d00c33ba3358d9fc8eece |
| Issue introduced in 5.7 with commit 1d3173a3bae7039b765a0956e3e4bf846dbaacb8 and fixed in 6.1.76 with commit 3c5ec66b4b3f6816f3a6161538672e389e537690 |
| Issue introduced in 5.7 with commit 1d3173a3bae7039b765a0956e3e4bf846dbaacb8 and fixed in 6.6.15 with commit eaefb9464031215d63c0a8a7e2bfaa00736aa17e |
| Issue introduced in 5.7 with commit 1d3173a3bae7039b765a0956e3e4bf846dbaacb8 and fixed in 6.7.3 with commit b8eff20d87092e14cac976d057cb0aea2f1d0830 |
| Issue introduced in 5.7 with commit 1d3173a3bae7039b765a0956e3e4bf846dbaacb8 and fixed in 6.8 with commit 01bd694ac2f682fb8017e16148b928482bc8fa4b |
| |
| 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-2023-52493 |
| 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/bus/mhi/host/main.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/20a6dea2d1c68d4e03c6bb50bc12e72e226b5c0e |
| https://git.kernel.org/stable/c/6e4c84316e2b70709f0d00c33ba3358d9fc8eece |
| https://git.kernel.org/stable/c/3c5ec66b4b3f6816f3a6161538672e389e537690 |
| https://git.kernel.org/stable/c/eaefb9464031215d63c0a8a7e2bfaa00736aa17e |
| https://git.kernel.org/stable/c/b8eff20d87092e14cac976d057cb0aea2f1d0830 |
| https://git.kernel.org/stable/c/01bd694ac2f682fb8017e16148b928482bc8fa4b |
