| 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-2024-57953: rtc: tps6594: Fix integer overflow on 32bit systems |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| rtc: tps6594: Fix integer overflow on 32bit systems |
| |
| The problem is this multiply in tps6594_rtc_set_offset() |
| |
| tmp = offset * TICKS_PER_HOUR; |
| |
| The "tmp" variable is an s64 but "offset" is a long in the |
| (-277774)-277774 range. On 32bit systems a long can hold numbers up to |
| approximately two billion. The number of TICKS_PER_HOUR is really large, |
| (32768 * 3600) or roughly a hundred million. When you start multiplying |
| by a hundred million it doesn't take long to overflow the two billion |
| mark. |
| |
| Probably the safest way to fix this is to change the type of |
| TICKS_PER_HOUR to long long because it's such a large number. |
| |
| The Linux kernel CVE team has assigned CVE-2024-57953 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.8 with commit 9f67c1e63976d3403f0b250b03ffe959c890f9db and fixed in 6.12.13 with commit 5127f3cbfc78a7b301b86328247230bec47e0bb3 |
| Issue introduced in 6.8 with commit 9f67c1e63976d3403f0b250b03ffe959c890f9db and fixed in 6.13.2 with commit 53b0c7b15accb18d15d95c7fe68f61630ebfd1ca |
| Issue introduced in 6.8 with commit 9f67c1e63976d3403f0b250b03ffe959c890f9db and fixed in 6.14 with commit 09c4a610153286cef54d4f0c85398f4e32fc227e |
| |
| 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-2024-57953 |
| 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/rtc/rtc-tps6594.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/5127f3cbfc78a7b301b86328247230bec47e0bb3 |
| https://git.kernel.org/stable/c/53b0c7b15accb18d15d95c7fe68f61630ebfd1ca |
| https://git.kernel.org/stable/c/09c4a610153286cef54d4f0c85398f4e32fc227e |
