| 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-2024-40992: RDMA/rxe: Fix responder length checking for UD request packets |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| RDMA/rxe: Fix responder length checking for UD request packets |
| |
| According to the IBA specification: |
| If a UD request packet is detected with an invalid length, the request |
| shall be an invalid request and it shall be silently dropped by |
| the responder. The responder then waits for a new request packet. |
| |
| commit 689c5421bfe0 ("RDMA/rxe: Fix incorrect responder length checking") |
| defers responder length check for UD QPs in function `copy_data`. |
| But it introduces a regression issue for UD QPs. |
| |
| When the packet size is too large to fit in the receive buffer. |
| `copy_data` will return error code -EINVAL. Then `send_data_in` |
| will return RESPST_ERR_MALFORMED_WQE. UD QP will transfer into |
| ERROR state. |
| |
| The Linux kernel CVE team has assigned CVE-2024-40992 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.2 with commit 689c5421bfe0eac65526bd97a466b9590a6aad3c and fixed in 6.6.36 with commit 163868ec1f6c610d16da9e458fe1dd7d5de97341 |
| Issue introduced in 6.2 with commit 689c5421bfe0eac65526bd97a466b9590a6aad3c and fixed in 6.9.7 with commit 943c94f41dfe36536dc9aaa12c9efdf548ceb996 |
| Issue introduced in 6.2 with commit 689c5421bfe0eac65526bd97a466b9590a6aad3c and fixed in 6.10 with commit f67ac0061c7614c1548963d3ef1ee1606efd8636 |
| |
| 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-2024-40992 |
| 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/infiniband/sw/rxe/rxe_resp.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/163868ec1f6c610d16da9e458fe1dd7d5de97341 |
| https://git.kernel.org/stable/c/943c94f41dfe36536dc9aaa12c9efdf548ceb996 |
| https://git.kernel.org/stable/c/f67ac0061c7614c1548963d3ef1ee1606efd8636 |
