| 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-2024-35869: smb: client: guarantee refcounted children from parent session |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| smb: client: guarantee refcounted children from parent session |
| |
| Avoid potential use-after-free bugs when walking DFS referrals, |
| mounting and performing DFS failover by ensuring that all children |
| from parent @tcon->ses are also refcounted. They're all needed across |
| the entire DFS mount. Get rid of @tcon->dfs_ses_list while we're at |
| it, too. |
| |
| The Linux kernel CVE team has assigned CVE-2024-35869 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 6.6.29 with commit 645f332c6b63499cc76197f9b6bffcc659ba64cc |
| Fixed in 6.8.5 with commit e1db9ae87b7148c021daee1fcc4bc71b2ac58a79 |
| Fixed in 6.9 with commit 062a7f0ff46eb57aff526897bd2bebfdb1d3046a |
| |
| 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-2024-35869 |
| 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: |
| fs/smb/client/cifsglob.h |
| fs/smb/client/cifsproto.h |
| fs/smb/client/connect.c |
| fs/smb/client/dfs.c |
| fs/smb/client/dfs.h |
| fs/smb/client/dfs_cache.c |
| fs/smb/client/misc.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/645f332c6b63499cc76197f9b6bffcc659ba64cc |
| https://git.kernel.org/stable/c/e1db9ae87b7148c021daee1fcc4bc71b2ac58a79 |
| https://git.kernel.org/stable/c/062a7f0ff46eb57aff526897bd2bebfdb1d3046a |
