| From bippy-1.1.0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@kernel.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-46742: smb/server: fix potential null-ptr-deref of lease_ctx_info in smb2_open() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| smb/server: fix potential null-ptr-deref of lease_ctx_info in smb2_open() |
| |
| null-ptr-deref will occur when (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) |
| and parse_lease_state() return NULL. |
| |
| Fix this by check if 'lease_ctx_info' is NULL. |
| |
| Additionally, remove the redundant parentheses in |
| parse_durable_handle_context(). |
| |
| The Linux kernel CVE team has assigned CVE-2024-46742 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 5.15.181 with commit 878f32878351104448b86ef5b85d1f8ed6f599fb |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.1.135 with commit ec28c35029b7930f31117f9284874b63bea4f31b |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.6.51 with commit 07f384c5be1f8633b13f0a22616e227570450bc6 |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.10.10 with commit 3b692794b81f2ecad69a4adbba687f3836824ada |
| Issue introduced in 5.15 with commit 0626e6641f6b467447c81dd7678a69c66f7746cf and fixed in 6.11 with commit 4e8771a3666c8f216eefd6bd2fd50121c6c437db |
| |
| 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-2024-46742 |
| 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/server/oplock.c |
| fs/smb/server/smb2pdu.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/878f32878351104448b86ef5b85d1f8ed6f599fb |
| https://git.kernel.org/stable/c/ec28c35029b7930f31117f9284874b63bea4f31b |
| https://git.kernel.org/stable/c/07f384c5be1f8633b13f0a22616e227570450bc6 |
| https://git.kernel.org/stable/c/3b692794b81f2ecad69a4adbba687f3836824ada |
| https://git.kernel.org/stable/c/4e8771a3666c8f216eefd6bd2fd50121c6c437db |
