| 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-2021-47296: KVM: PPC: Fix kvm_arch_vcpu_ioctl vcpu_load leak |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| KVM: PPC: Fix kvm_arch_vcpu_ioctl vcpu_load leak |
| |
| vcpu_put is not called if the user copy fails. This can result in preempt |
| notifier corruption and crashes, among other issues. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47296 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.18 with commit b3cebfe8c1cadf1817939dcc3688a2504a69c662 and fixed in 4.19.199 with commit 9bafc34dc4ad0cef18727c557f21ed3c3304df50 |
| Issue introduced in 4.18 with commit b3cebfe8c1cadf1817939dcc3688a2504a69c662 and fixed in 5.4.136 with commit f38527f1890543cdfca8dfd06f75f9887cce6151 |
| Issue introduced in 4.18 with commit b3cebfe8c1cadf1817939dcc3688a2504a69c662 and fixed in 5.10.54 with commit e14ef1095387f764d95614d3ec9e4d07c82a3533 |
| Issue introduced in 4.18 with commit b3cebfe8c1cadf1817939dcc3688a2504a69c662 and fixed in 5.13.6 with commit a4a488915feaad38345cc01b80d52e8200ff5209 |
| Issue introduced in 4.18 with commit b3cebfe8c1cadf1817939dcc3688a2504a69c662 and fixed in 5.14 with commit bc4188a2f56e821ea057aca6bf444e138d06c252 |
| |
| 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-2021-47296 |
| 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: |
| arch/powerpc/kvm/powerpc.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/9bafc34dc4ad0cef18727c557f21ed3c3304df50 |
| https://git.kernel.org/stable/c/f38527f1890543cdfca8dfd06f75f9887cce6151 |
| https://git.kernel.org/stable/c/e14ef1095387f764d95614d3ec9e4d07c82a3533 |
| https://git.kernel.org/stable/c/a4a488915feaad38345cc01b80d52e8200ff5209 |
| https://git.kernel.org/stable/c/bc4188a2f56e821ea057aca6bf444e138d06c252 |
