| 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-2024-49568: net/smc: check v2_ext_offset/eid_cnt/ism_gid_cnt when receiving proposal msg |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net/smc: check v2_ext_offset/eid_cnt/ism_gid_cnt when receiving proposal msg |
| |
| When receiving proposal msg in server, the fields v2_ext_offset/ |
| eid_cnt/ism_gid_cnt in proposal msg are from the remote client |
| and can not be fully trusted. Especially the field v2_ext_offset, |
| once exceed the max value, there has the chance to access wrong |
| address, and crash may happen. |
| |
| This patch checks the fields v2_ext_offset/eid_cnt/ism_gid_cnt |
| before using them. |
| |
| The Linux kernel CVE team has assigned CVE-2024-49568 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.10 with commit 8c3dca341aea885249e08856c4380300b75d2cf5 and fixed in 6.6.68 with commit 295a92e3df32e72aff0f4bc25c310e349d07ffbf |
| Issue introduced in 5.10 with commit 8c3dca341aea885249e08856c4380300b75d2cf5 and fixed in 6.12.7 with commit 42f6beb2d5779429417b5f8115a4e3fa695d2a6c |
| Issue introduced in 5.10 with commit 8c3dca341aea885249e08856c4380300b75d2cf5 and fixed in 6.13 with commit 7863c9f3d24ba49dbead7e03dfbe40deb5888fdf |
| |
| 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-2024-49568 |
| 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: |
| net/smc/af_smc.c |
| net/smc/smc_clc.c |
| net/smc/smc_clc.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/295a92e3df32e72aff0f4bc25c310e349d07ffbf |
| https://git.kernel.org/stable/c/42f6beb2d5779429417b5f8115a4e3fa695d2a6c |
| https://git.kernel.org/stable/c/7863c9f3d24ba49dbead7e03dfbe40deb5888fdf |
