| 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-2021-47138: cxgb4: avoid accessing registers when clearing filters |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| cxgb4: avoid accessing registers when clearing filters |
| |
| Hardware register having the server TID base can contain |
| invalid values when adapter is in bad state (for example, |
| due to AER fatal error). Reading these invalid values in the |
| register can lead to out-of-bound memory access. So, fix |
| by using the saved server TID base when clearing filters. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47138 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.2 with commit b1a79360ee862f8ada4798ad2346fa45bb41b527 and fixed in 5.4.124 with commit 0bf49b3c8d8b3a43ce09f1b2db70e5484d31fcdf |
| Issue introduced in 5.2 with commit b1a79360ee862f8ada4798ad2346fa45bb41b527 and fixed in 5.10.42 with commit 02f03883fdb10ad7e66717c70ea163a8d27ae6e7 |
| Issue introduced in 5.2 with commit b1a79360ee862f8ada4798ad2346fa45bb41b527 and fixed in 5.12.9 with commit 285207a558ab456aa7d8aa877ecc7e91fcc51710 |
| Issue introduced in 5.2 with commit b1a79360ee862f8ada4798ad2346fa45bb41b527 and fixed in 5.13 with commit 88c380df84fbd03f9b137c2b9d0a44b9f2f553b0 |
| |
| 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-2021-47138 |
| 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/net/ethernet/chelsio/cxgb4/cxgb4_filter.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/0bf49b3c8d8b3a43ce09f1b2db70e5484d31fcdf |
| https://git.kernel.org/stable/c/02f03883fdb10ad7e66717c70ea163a8d27ae6e7 |
| https://git.kernel.org/stable/c/285207a558ab456aa7d8aa877ecc7e91fcc51710 |
| https://git.kernel.org/stable/c/88c380df84fbd03f9b137c2b9d0a44b9f2f553b0 |
