| 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-2023-52902: nommu: fix memory leak in do_mmap() error path |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| nommu: fix memory leak in do_mmap() error path |
| |
| The preallocation of the maple tree nodes may leak if the error path to |
| "error_just_free" is taken. Fix this by moving the freeing of the maple |
| tree nodes to a shared location for all error paths. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52902 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.1 with commit 8220543df1489ef96c3d4e8b0b3b03c340e3943e and fixed in 6.1.8 with commit 1442d51026c58e7c11dd5f9b19650632a48676d4 |
| Issue introduced in 6.1 with commit 8220543df1489ef96c3d4e8b0b3b03c340e3943e and fixed in 6.2 with commit 7f31cced5724e6d414fe750aa1cd7e7b578ec22f |
| |
| 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-2023-52902 |
| 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: |
| mm/nommu.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/1442d51026c58e7c11dd5f9b19650632a48676d4 |
| https://git.kernel.org/stable/c/7f31cced5724e6d414fe750aa1cd7e7b578ec22f |
