| 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-2022-49289: uaccess: fix integer overflow on access_ok() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| uaccess: fix integer overflow on access_ok() |
| |
| Three architectures check the end of a user access against the |
| address limit without taking a possible overflow into account. |
| Passing a negative length or another overflow in here returns |
| success when it should not. |
| |
| Use the most common correct implementation here, which optimizes |
| for a constant 'size' argument, and turns the common case into a |
| single comparison. |
| |
| The Linux kernel CVE team has assigned CVE-2022-49289 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.2 with commit 7567746e1c0d66ac0ef8a9d8816ca694462c7370 and fixed in 5.15.32 with commit e65d28d4e9bf90a35ba79c06661a572a38391dec |
| Issue introduced in 3.2 with commit 7567746e1c0d66ac0ef8a9d8816ca694462c7370 and fixed in 5.16.18 with commit 99801e2f457824955da4aadaa035913a6dede03a |
| Issue introduced in 3.2 with commit 7567746e1c0d66ac0ef8a9d8816ca694462c7370 and fixed in 5.17.1 with commit a1ad747fc1a0e06d1bf26b996ee8a56b5c8d02d8 |
| Issue introduced in 3.2 with commit 7567746e1c0d66ac0ef8a9d8816ca694462c7370 and fixed in 5.18 with commit 222ca305c9fd39e5ed8104da25c09b2b79a516a8 |
| |
| 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-2022-49289 |
| 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/csky/include/asm/uaccess.h |
| arch/hexagon/include/asm/uaccess.h |
| arch/microblaze/include/asm/uaccess.h |
| |
| |
| 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/e65d28d4e9bf90a35ba79c06661a572a38391dec |
| https://git.kernel.org/stable/c/99801e2f457824955da4aadaa035913a6dede03a |
| https://git.kernel.org/stable/c/a1ad747fc1a0e06d1bf26b996ee8a56b5c8d02d8 |
| https://git.kernel.org/stable/c/222ca305c9fd39e5ed8104da25c09b2b79a516a8 |
