| 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-2024-42099: s390/dasd: Fix invalid dereferencing of indirect CCW data pointer |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| s390/dasd: Fix invalid dereferencing of indirect CCW data pointer |
| |
| Fix invalid dereferencing of indirect CCW data pointer in |
| dasd_eckd_dump_sense() that leads to a kernel panic in error cases. |
| |
| When using indirect addressing for DASD CCWs (IDAW) the CCW CDA pointer |
| does not contain the data address itself but a pointer to the IDAL. |
| This needs to be translated from physical to virtual as well before |
| using it. |
| |
| This dereferencing is also used for dasd_page_cache and also fixed |
| although it is very unlikely that this code path ever gets used. |
| |
| The Linux kernel CVE team has assigned CVE-2024-42099 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.9 with commit c0bd39601c13ab08e961d77a90dfeeff56056353 and fixed in 6.9.9 with commit c116475f7d6410b1e6d399207ac75de6cf9c3652 |
| Issue introduced in 6.9 with commit c0bd39601c13ab08e961d77a90dfeeff56056353 and fixed in 6.10 with commit b3a58f3b90f564f42a5c35778d8c5107b2c2150b |
| |
| 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-2024-42099 |
| 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/s390/block/dasd_eckd.c |
| drivers/s390/block/dasd_fba.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/c116475f7d6410b1e6d399207ac75de6cf9c3652 |
| https://git.kernel.org/stable/c/b3a58f3b90f564f42a5c35778d8c5107b2c2150b |
