| 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-2023-52494: bus: mhi: host: Add alignment check for event ring read pointer |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| bus: mhi: host: Add alignment check for event ring read pointer |
| |
| Though we do check the event ring read pointer by "is_valid_ring_ptr" |
| to make sure it is in the buffer range, but there is another risk the |
| pointer may be not aligned. Since we are expecting event ring elements |
| are 128 bits(struct mhi_ring_element) aligned, an unaligned read pointer |
| could lead to multiple issues like DoS or ring buffer memory corruption. |
| |
| So add a alignment check for event ring read pointer. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52494 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.13 with commit ec32332df7645e0ba463a08d483fe97665167071 and fixed in 5.15.149 with commit 94991728c84f8df54fd9eec9b85855ef9057ea08 |
| Issue introduced in 5.13 with commit ec32332df7645e0ba463a08d483fe97665167071 and fixed in 6.1.76 with commit 2df39ac8f813860f79782807c3f7acff40b3c551 |
| Issue introduced in 5.13 with commit ec32332df7645e0ba463a08d483fe97665167071 and fixed in 6.6.15 with commit a9ebfc405fe1be145f414eafadcbf09506082010 |
| Issue introduced in 5.13 with commit ec32332df7645e0ba463a08d483fe97665167071 and fixed in 6.7.3 with commit ecf8320111822a1ae5d5fc512953eab46d543d0b |
| Issue introduced in 5.13 with commit ec32332df7645e0ba463a08d483fe97665167071 and fixed in 6.8 with commit eff9704f5332a13b08fbdbe0f84059c9e7051d5f |
| Issue introduced in 5.10.36 with commit a1d2bd164c1c78f87968b7883964175ec41c32ae |
| Issue introduced in 5.11.20 with commit fd5f40fc887485a8b9a6806a640a0d8e0ef1afb6 |
| Issue introduced in 5.12.3 with commit 76879a980cd5ede4cb9a638999fb80d37bc09db5 |
| |
| 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-2023-52494 |
| 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/94991728c84f8df54fd9eec9b85855ef9057ea08 |
| https://git.kernel.org/stable/c/2df39ac8f813860f79782807c3f7acff40b3c551 |
| https://git.kernel.org/stable/c/a9ebfc405fe1be145f414eafadcbf09506082010 |
| https://git.kernel.org/stable/c/ecf8320111822a1ae5d5fc512953eab46d543d0b |
| https://git.kernel.org/stable/c/eff9704f5332a13b08fbdbe0f84059c9e7051d5f |
