| From bippy-7c5fe7eed585 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-2025-21947: ksmbd: fix type confusion via race condition when using ipc_msg_send_request |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| ksmbd: fix type confusion via race condition when using ipc_msg_send_request |
| |
| req->handle is allocated using ksmbd_acquire_id(&ipc_ida), based on |
| ida_alloc. req->handle from ksmbd_ipc_login_request and |
| FSCTL_PIPE_TRANSCEIVE ioctl can be same and it could lead to type confusion |
| between messages, resulting in access to unexpected parts of memory after |
| an incorrect delivery. ksmbd check type of ipc response but missing add |
| continue to check next ipc reponse. |
| |
| The Linux kernel CVE team has assigned CVE-2025-21947 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.1.131 with commit 6321bbda4244b93802d61cfe0887883aae322f4b |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.6.83 with commit 76861630b29e51373e73e7b00ad0d467b6941162 |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.12.19 with commit 3cb2b2e41541fe6f9cc55ca22d4c0bd260498aea |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.13.7 with commit 1e8833c03a38e1d5d5df6484e3f670a2fd38fb76 |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.14 with commit e2ff19f0b7a30e03516e6eb73b948e27a55bc9d2 |
| |
| 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-2025-21947 |
| 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: |
| fs/smb/server/transport_ipc.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/6321bbda4244b93802d61cfe0887883aae322f4b |
| https://git.kernel.org/stable/c/76861630b29e51373e73e7b00ad0d467b6941162 |
| https://git.kernel.org/stable/c/3cb2b2e41541fe6f9cc55ca22d4c0bd260498aea |
| https://git.kernel.org/stable/c/1e8833c03a38e1d5d5df6484e3f670a2fd38fb76 |
| https://git.kernel.org/stable/c/e2ff19f0b7a30e03516e6eb73b948e27a55bc9d2 |
