| 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-2024-46741: misc: fastrpc: Fix double free of 'buf' in error path |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| misc: fastrpc: Fix double free of 'buf' in error path |
| |
| smatch warning: |
| drivers/misc/fastrpc.c:1926 fastrpc_req_mmap() error: double free of 'buf' |
| |
| In fastrpc_req_mmap() error path, the fastrpc buffer is freed in |
| fastrpc_req_munmap_impl() if unmap is successful. |
| |
| But in the end, there is an unconditional call to fastrpc_buf_free(). |
| So the above case triggers the double free of fastrpc buf. |
| |
| The Linux kernel CVE team has assigned CVE-2024-46741 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.2 with commit 72fa6f7820c4cf96c5f7aabc4e54bdf52d1e2ac2 and fixed in 6.6.51 with commit f77dc8a75859e559f3238a6d906206259227985e |
| Issue introduced in 6.2 with commit 72fa6f7820c4cf96c5f7aabc4e54bdf52d1e2ac2 and fixed in 6.10.10 with commit bfc1704d909dc9911a558b1a5833d3d61a43a1f2 |
| Issue introduced in 6.2 with commit 72fa6f7820c4cf96c5f7aabc4e54bdf52d1e2ac2 and fixed in 6.11 with commit e8c276d4dc0e19ee48385f74426aebc855b49aaf |
| |
| 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-2024-46741 |
| 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/misc/fastrpc.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/f77dc8a75859e559f3238a6d906206259227985e |
| https://git.kernel.org/stable/c/bfc1704d909dc9911a558b1a5833d3d61a43a1f2 |
| https://git.kernel.org/stable/c/e8c276d4dc0e19ee48385f74426aebc855b49aaf |
