| 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-2025-21783: gpiolib: Fix crash on error in gpiochip_get_ngpios() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| gpiolib: Fix crash on error in gpiochip_get_ngpios() |
| |
| The gpiochip_get_ngpios() uses chip_*() macros to print messages. |
| However these macros rely on gpiodev to be initialised and set, |
| which is not the case when called via bgpio_init(). In such a case |
| the printing messages will crash on NULL pointer dereference. |
| Replace chip_*() macros by the respective dev_*() ones to avoid |
| such crash. |
| |
| The Linux kernel CVE team has assigned CVE-2025-21783 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.6 with commit 55b2395e4e92adc492c6b30ac109eb78250dcd9d and fixed in 6.6.79 with commit 4d9b2b62e1136d10f661ec4c0c268140b6f74f4f |
| Issue introduced in 6.6 with commit 55b2395e4e92adc492c6b30ac109eb78250dcd9d and fixed in 6.12.16 with commit a7052afa9eae2239e25943baa8817a6a56e8aa68 |
| Issue introduced in 6.6 with commit 55b2395e4e92adc492c6b30ac109eb78250dcd9d and fixed in 6.13.4 with commit 189fb76215e479c10731baabb50f1a352d2078f5 |
| Issue introduced in 6.6 with commit 55b2395e4e92adc492c6b30ac109eb78250dcd9d and fixed in 6.14 with commit 7b4aebeecbbd5b5fe73e35fad3f62ed21aa7ef44 |
| |
| 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-2025-21783 |
| 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.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/4d9b2b62e1136d10f661ec4c0c268140b6f74f4f |
| https://git.kernel.org/stable/c/a7052afa9eae2239e25943baa8817a6a56e8aa68 |
| https://git.kernel.org/stable/c/189fb76215e479c10731baabb50f1a352d2078f5 |
| https://git.kernel.org/stable/c/7b4aebeecbbd5b5fe73e35fad3f62ed21aa7ef44 |
