| 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-2021-47373: irqchip/gic-v3-its: Fix potential VPE leak on error |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| irqchip/gic-v3-its: Fix potential VPE leak on error |
| |
| In its_vpe_irq_domain_alloc, when its_vpe_init() returns an error, |
| there is an off-by-one in the number of VPEs to be freed. |
| |
| Fix it by simply passing the number of VPEs allocated, which is the |
| index of the loop iterating over the VPEs. |
| |
| [maz: fixed commit message] |
| |
| The Linux kernel CVE team has assigned CVE-2021-47373 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.14 with commit 7d75bbb4bc1ad90386776459d37e4ddfe605671e and fixed in 4.14.249 with commit 7d39992d45acd6f2d6b2f62389c55b61fb3d486b |
| Issue introduced in 4.14 with commit 7d75bbb4bc1ad90386776459d37e4ddfe605671e and fixed in 4.19.209 with commit 5701e8bff314c155e7afdc467b1e0389d86853d0 |
| Issue introduced in 4.14 with commit 7d75bbb4bc1ad90386776459d37e4ddfe605671e and fixed in 5.4.150 with commit 42d3711c23781045e7a5cd28536c774b9a66d20b |
| Issue introduced in 4.14 with commit 7d75bbb4bc1ad90386776459d37e4ddfe605671e and fixed in 5.10.70 with commit 568662e37f927e3dc3e475f3ff7cf4ab7719c5e7 |
| Issue introduced in 4.14 with commit 7d75bbb4bc1ad90386776459d37e4ddfe605671e and fixed in 5.14.9 with commit e0c1c2e5da19685a20557a50f10c6aa4fa26aa84 |
| Issue introduced in 4.14 with commit 7d75bbb4bc1ad90386776459d37e4ddfe605671e and fixed in 5.15 with commit 280bef512933b2dda01d681d8cbe499b98fc5bdd |
| |
| 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-2021-47373 |
| 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/irqchip/irq-gic-v3-its.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/7d39992d45acd6f2d6b2f62389c55b61fb3d486b |
| https://git.kernel.org/stable/c/5701e8bff314c155e7afdc467b1e0389d86853d0 |
| https://git.kernel.org/stable/c/42d3711c23781045e7a5cd28536c774b9a66d20b |
| https://git.kernel.org/stable/c/568662e37f927e3dc3e475f3ff7cf4ab7719c5e7 |
| https://git.kernel.org/stable/c/e0c1c2e5da19685a20557a50f10c6aa4fa26aa84 |
| https://git.kernel.org/stable/c/280bef512933b2dda01d681d8cbe499b98fc5bdd |
