| 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-2024-36898: gpiolib: cdev: fix uninitialised kfifo |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| gpiolib: cdev: fix uninitialised kfifo |
| |
| If a line is requested with debounce, and that results in debouncing |
| in software, and the line is subsequently reconfigured to enable edge |
| detection then the allocation of the kfifo to contain edge events is |
| overlooked. This results in events being written to and read from an |
| uninitialised kfifo. Read events are returned to userspace. |
| |
| Initialise the kfifo in the case where the software debounce is |
| already active. |
| |
| The Linux kernel CVE team has assigned CVE-2024-36898 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.10 with commit 65cff70464068a823b3f4a28074000febdce0630 and fixed in 6.1.91 with commit 1a51e24404d77bb3307c1e39eee0d8e86febb1a5 |
| Issue introduced in 5.10 with commit 65cff70464068a823b3f4a28074000febdce0630 and fixed in 6.6.31 with commit 883e4bbf06eb5fb7482679e4edb201093e9f55a2 |
| Issue introduced in 5.10 with commit 65cff70464068a823b3f4a28074000febdce0630 and fixed in 6.8.10 with commit bd7139a70ee8d8ea872b223e043730cf6f5e2b0e |
| Issue introduced in 5.10 with commit 65cff70464068a823b3f4a28074000febdce0630 and fixed in 6.9 with commit ee0166b637a5e376118e9659e5b4148080f1d27e |
| |
| 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-2024-36898 |
| 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/gpio/gpiolib-cdev.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/1a51e24404d77bb3307c1e39eee0d8e86febb1a5 |
| https://git.kernel.org/stable/c/883e4bbf06eb5fb7482679e4edb201093e9f55a2 |
| https://git.kernel.org/stable/c/bd7139a70ee8d8ea872b223e043730cf6f5e2b0e |
| https://git.kernel.org/stable/c/ee0166b637a5e376118e9659e5b4148080f1d27e |
