| 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-2021-47653: media: davinci: vpif: fix use-after-free on driver unbind |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| media: davinci: vpif: fix use-after-free on driver unbind |
| |
| The driver allocates and registers two platform device structures during |
| probe, but the devices were never deregistered on driver unbind. |
| |
| This results in a use-after-free on driver unbind as the device |
| structures were allocated using devres and would be freed by driver |
| core when remove() returns. |
| |
| Fix this by adding the missing deregistration calls to the remove() |
| callback and failing probe on registration errors. |
| |
| Note that the platform device structures must be freed using a proper |
| release callback to avoid leaking associated resources like device |
| names. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47653 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 4.13 with commit 479f7a1181058689435baddc16a6a42e1a8ff0e8 and fixed in 5.15.54 with commit 6512c3c39cb6b573b791ce45365818a38b76afbe |
| Issue introduced in 4.13 with commit 479f7a1181058689435baddc16a6a42e1a8ff0e8 and fixed in 5.16.19 with commit b5a3bb7f6f164eb6ee74ef4898dcd019b2063448 |
| Issue introduced in 4.13 with commit 479f7a1181058689435baddc16a6a42e1a8ff0e8 and fixed in 5.17.2 with commit 9ffc602e14d7b9f7e7cb2f67e18dfef9ef8af676 |
| Issue introduced in 4.13 with commit 479f7a1181058689435baddc16a6a42e1a8ff0e8 and fixed in 5.18 with commit 43acb728bbc40169d2e2425e84a80068270974be |
| |
| 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-2021-47653 |
| 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/media/platform/davinci/vpif.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/6512c3c39cb6b573b791ce45365818a38b76afbe |
| https://git.kernel.org/stable/c/b5a3bb7f6f164eb6ee74ef4898dcd019b2063448 |
| https://git.kernel.org/stable/c/9ffc602e14d7b9f7e7cb2f67e18dfef9ef8af676 |
| https://git.kernel.org/stable/c/43acb728bbc40169d2e2425e84a80068270974be |
