| 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-2024-26777: fbdev: sis: Error out if pixclock equals zero |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| fbdev: sis: Error out if pixclock equals zero |
| |
| The userspace program could pass any values to the driver through |
| ioctl() interface. If the driver doesn't check the value of pixclock, |
| it may cause divide-by-zero error. |
| |
| In sisfb_check_var(), var->pixclock is used as a divisor to caculate |
| drate before it is checked against zero. Fix this by checking it |
| at the beginning. |
| |
| This is similar to CVE-2022-3061 in i740fb which was fixed by |
| commit 15cf0b8. |
| |
| The Linux kernel CVE team has assigned CVE-2024-26777 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 4.19.308 with commit 84246c35ca34207114055a87552a1c4289c8fd7e |
| Fixed in 5.4.270 with commit 6db07619d173765bd8622d63809cbfe361f04207 |
| Fixed in 5.10.211 with commit cd36da760bd1f78c63c7078407baf01dd724f313 |
| Fixed in 5.15.150 with commit df6e2088c6f4cad539cf67cba2d6764461e798d1 |
| Fixed in 6.1.80 with commit f329523f6a65c3bbce913ad35473d83a319d5d99 |
| Fixed in 6.6.19 with commit 99f1abc34a6dde248d2219d64aa493c76bbdd9eb |
| Fixed in 6.7.7 with commit 1d11dd3ea5d039c7da089f309f39c4cd363b924b |
| Fixed in 6.8 with commit e421946be7d9bf545147bea8419ef8239cb7ca52 |
| |
| 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-2024-26777 |
| 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/video/fbdev/sis/sis_main.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/84246c35ca34207114055a87552a1c4289c8fd7e |
| https://git.kernel.org/stable/c/6db07619d173765bd8622d63809cbfe361f04207 |
| https://git.kernel.org/stable/c/cd36da760bd1f78c63c7078407baf01dd724f313 |
| https://git.kernel.org/stable/c/df6e2088c6f4cad539cf67cba2d6764461e798d1 |
| https://git.kernel.org/stable/c/f329523f6a65c3bbce913ad35473d83a319d5d99 |
| https://git.kernel.org/stable/c/99f1abc34a6dde248d2219d64aa493c76bbdd9eb |
| https://git.kernel.org/stable/c/1d11dd3ea5d039c7da089f309f39c4cd363b924b |
| https://git.kernel.org/stable/c/e421946be7d9bf545147bea8419ef8239cb7ca52 |
