| 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-2021-47141: gve: Add NULL pointer checks when freeing irqs. |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| gve: Add NULL pointer checks when freeing irqs. |
| |
| When freeing notification blocks, we index priv->msix_vectors. |
| If we failed to allocate priv->msix_vectors (see abort_with_msix_vectors) |
| this could lead to a NULL pointer dereference if the driver is unloaded. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47141 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.3 with commit 893ce44df56580fb878ca5af9c4a5fd87567da50 and fixed in 5.4.124 with commit 821149ee88c206fa37e79c1868cc270518484876 |
| Issue introduced in 5.3 with commit 893ce44df56580fb878ca5af9c4a5fd87567da50 and fixed in 5.10.42 with commit da21a35c00ff1a1794d4f166d3b3fa8db4d0f6fb |
| Issue introduced in 5.3 with commit 893ce44df56580fb878ca5af9c4a5fd87567da50 and fixed in 5.12.9 with commit 5278c75266c5094d3c0958793bf12fc90300e580 |
| Issue introduced in 5.3 with commit 893ce44df56580fb878ca5af9c4a5fd87567da50 and fixed in 5.13 with commit 5218e919c8d06279884aa0baf76778a6817d5b93 |
| |
| 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-2021-47141 |
| 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/google/gve/gve_main.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/821149ee88c206fa37e79c1868cc270518484876 |
| https://git.kernel.org/stable/c/da21a35c00ff1a1794d4f166d3b3fa8db4d0f6fb |
| https://git.kernel.org/stable/c/5278c75266c5094d3c0958793bf12fc90300e580 |
| https://git.kernel.org/stable/c/5218e919c8d06279884aa0baf76778a6817d5b93 |
