| 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-2024-50238: phy: qcom: qmp-usbc: fix NULL-deref on runtime suspend |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| phy: qcom: qmp-usbc: fix NULL-deref on runtime suspend |
| |
| Commit 413db06c05e7 ("phy: qcom-qmp-usb: clean up probe initialisation") |
| removed most users of the platform device driver data from the |
| qcom-qmp-usb driver, but mistakenly also removed the initialisation |
| despite the data still being used in the runtime PM callbacks. This bug |
| was later reproduced when the driver was copied to create the qmp-usbc |
| driver. |
| |
| Restore the driver data initialisation at probe to avoid a NULL-pointer |
| dereference on runtime suspend. |
| |
| Apparently no one uses runtime PM, which currently needs to be enabled |
| manually through sysfs, with these drivers. |
| |
| The Linux kernel CVE team has assigned CVE-2024-50238 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.9 with commit 19281571a4d5b6049dad9318db081af48818b1d2 and fixed in 6.11.7 with commit c7086dc0539b1b2b61c8c735186698bca4858246 |
| Issue introduced in 6.9 with commit 19281571a4d5b6049dad9318db081af48818b1d2 and fixed in 6.12 with commit 34c21f94fa1e147a19b54b6adf0c93a623b70dd8 |
| Issue introduced in 6.8.2 with commit bdb35fcff34af08fc7a7cb92f99ff1442e975cb1 |
| |
| 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-2024-50238 |
| 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/phy/qualcomm/phy-qcom-qmp-usbc.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/c7086dc0539b1b2b61c8c735186698bca4858246 |
| https://git.kernel.org/stable/c/34c21f94fa1e147a19b54b6adf0c93a623b70dd8 |
