| 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-2024-26598: KVM: arm64: vgic-its: Avoid potential UAF in LPI translation cache |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| KVM: arm64: vgic-its: Avoid potential UAF in LPI translation cache |
| |
| There is a potential UAF scenario in the case of an LPI translation |
| cache hit racing with an operation that invalidates the cache, such |
| as a DISCARD ITS command. The root of the problem is that |
| vgic_its_check_cache() does not elevate the refcount on the vgic_irq |
| before dropping the lock that serializes refcount changes. |
| |
| Have vgic_its_check_cache() raise the refcount on the returned vgic_irq |
| and add the corresponding decrement after queueing the interrupt. |
| |
| The Linux kernel CVE team has assigned CVE-2024-26598 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 5.4.269 with commit d04acadb6490aa3314f9c9e087691e55de153b88 |
| Fixed in 5.10.209 with commit ba7be666740847d967822bed15500656b26bc703 |
| Fixed in 5.15.148 with commit 12c2759ab1343c124ed46ba48f27bd1ef5d2dff4 |
| Fixed in 6.1.75 with commit dba788e25f05209adf2b0175eb1691dc89fb1ba6 |
| Fixed in 6.6.14 with commit 65b201bf3e9af1b0254243a5881390eda56f72d1 |
| Fixed in 6.7.2 with commit dd3956a1b3dd11f46488c928cb890d6937d1ca80 |
| Fixed in 6.8 with commit ad362fe07fecf0aba839ff2cc59a3617bd42c33f |
| |
| 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-2024-26598 |
| 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/arm64/kvm/vgic/vgic-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/d04acadb6490aa3314f9c9e087691e55de153b88 |
| https://git.kernel.org/stable/c/ba7be666740847d967822bed15500656b26bc703 |
| https://git.kernel.org/stable/c/12c2759ab1343c124ed46ba48f27bd1ef5d2dff4 |
| https://git.kernel.org/stable/c/dba788e25f05209adf2b0175eb1691dc89fb1ba6 |
| https://git.kernel.org/stable/c/65b201bf3e9af1b0254243a5881390eda56f72d1 |
| https://git.kernel.org/stable/c/dd3956a1b3dd11f46488c928cb890d6937d1ca80 |
| https://git.kernel.org/stable/c/ad362fe07fecf0aba839ff2cc59a3617bd42c33f |
