| 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-2024-50092: net: netconsole: fix wrong warning |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| net: netconsole: fix wrong warning |
| |
| A warning is triggered when there is insufficient space in the buffer |
| for userdata. However, this is not an issue since userdata will be sent |
| in the next iteration. |
| |
| Current warning message: |
| |
| ------------[ cut here ]------------ |
| WARNING: CPU: 13 PID: 3013042 at drivers/net/netconsole.c:1122 write_ext_msg+0x3b6/0x3d0 |
| ? write_ext_msg+0x3b6/0x3d0 |
| console_flush_all+0x1e9/0x330 |
| |
| The code incorrectly issues a warning when this_chunk is zero, which is |
| a valid scenario. The warning should only be triggered when this_chunk |
| is negative. |
| |
| The Linux kernel CVE team has assigned CVE-2024-50092 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.9 with commit 1ec9daf950936c2a1c591596e83c09ce2eb12ade and fixed in 6.11.4 with commit 712a3af3710263444217df54e7f337f99df198d2 |
| Issue introduced in 6.9 with commit 1ec9daf950936c2a1c591596e83c09ce2eb12ade and fixed in 6.12 with commit d94785bb46b6167382b1de3290eccc91fa98df53 |
| |
| 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-2024-50092 |
| 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/net/netconsole.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/712a3af3710263444217df54e7f337f99df198d2 |
| https://git.kernel.org/stable/c/d94785bb46b6167382b1de3290eccc91fa98df53 |
