| 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-2023-52937: HV: hv_balloon: fix memory leak with using debugfs_lookup() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| HV: hv_balloon: fix memory leak with using debugfs_lookup() |
| |
| When calling debugfs_lookup() the result must have dput() called on it, |
| otherwise the memory will leak over time. To make things simpler, just |
| call debugfs_lookup_and_remove() instead which handles all of the logic |
| at once. |
| |
| The Linux kernel CVE team has assigned CVE-2023-52937 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.0 with commit d180e0a1be6cea2b7436fadbd1c96aecdf3c46c7 and fixed in 6.1.11 with commit 0b570a059cf42ad6e2eb632f47c23813d58d8303 |
| Issue introduced in 6.0 with commit d180e0a1be6cea2b7436fadbd1c96aecdf3c46c7 and fixed in 6.2 with commit 6dfb0771429a63db8561d44147f2bb76f93e1c86 |
| |
| 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-2023-52937 |
| 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/hv/hv_balloon.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/0b570a059cf42ad6e2eb632f47c23813d58d8303 |
| https://git.kernel.org/stable/c/6dfb0771429a63db8561d44147f2bb76f93e1c86 |
