| 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-2021-46934: i2c: validate user data in compat ioctl |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| i2c: validate user data in compat ioctl |
| |
| Wrong user data may cause warning in i2c_transfer(), ex: zero msgs. |
| Userspace should not be able to trigger warnings, so this patch adds |
| validation checks for user data in compact ioctl to prevent reported |
| warnings |
| |
| The Linux kernel CVE team has assigned CVE-2021-46934 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.15 with commit 7d5cb45655f2e9e37ef75d18f50c0072ef14a38b and fixed in 4.19.224 with commit 407c8708fb1bf2d4afc5337ef50635cf540c364b |
| Issue introduced in 4.15 with commit 7d5cb45655f2e9e37ef75d18f50c0072ef14a38b and fixed in 5.4.170 with commit 9e4a3f47eff476097e0c7faac04d1831fc70237d |
| Issue introduced in 4.15 with commit 7d5cb45655f2e9e37ef75d18f50c0072ef14a38b and fixed in 5.10.90 with commit 8d31cbab4c295d7010ebb729e9d02d0e9cece18f |
| Issue introduced in 4.15 with commit 7d5cb45655f2e9e37ef75d18f50c0072ef14a38b and fixed in 5.15.13 with commit f68599581067e8a5a8901ba9eb270b4519690e26 |
| Issue introduced in 4.15 with commit 7d5cb45655f2e9e37ef75d18f50c0072ef14a38b and fixed in 5.16 with commit bb436283e25aaf1533ce061605d23a9564447bdf |
| |
| 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-2021-46934 |
| 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/i2c/i2c-dev.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/407c8708fb1bf2d4afc5337ef50635cf540c364b |
| https://git.kernel.org/stable/c/9e4a3f47eff476097e0c7faac04d1831fc70237d |
| https://git.kernel.org/stable/c/8d31cbab4c295d7010ebb729e9d02d0e9cece18f |
| https://git.kernel.org/stable/c/f68599581067e8a5a8901ba9eb270b4519690e26 |
| https://git.kernel.org/stable/c/bb436283e25aaf1533ce061605d23a9564447bdf |
