| 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-2024-44940: fou: remove warn in gue_gro_receive on unsupported protocol |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| fou: remove warn in gue_gro_receive on unsupported protocol |
| |
| Drop the WARN_ON_ONCE inn gue_gro_receive if the encapsulated type is |
| not known or does not have a GRO handler. |
| |
| Such a packet is easily constructed. Syzbot generates them and sets |
| off this warning. |
| |
| Remove the warning as it is expected and not actionable. |
| |
| The warning was previously reduced from WARN_ON to WARN_ON_ONCE in |
| commit 270136613bf7 ("fou: Do WARN_ON_ONCE in gue_gro_receive for bad |
| proto callbacks"). |
| |
| The Linux kernel CVE team has assigned CVE-2024-44940 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 5.10.234 with commit a925a200299a6dfc7c172f54da6f374edc930053 |
| Fixed in 5.15.174 with commit b1453a5616c7bd8acd90633ceba4e59105ba3b51 |
| Fixed in 6.1.107 with commit 5a2e37bc648a2503bf6d687aed27b9f4455d82eb |
| Fixed in 6.6.47 with commit 3db4395332e7050ef9ddeb3052e6b5019f2a2a59 |
| Fixed in 6.10.6 with commit 440ab7f97261bc28501636a13998e1b1946d2e79 |
| Fixed in 6.11 with commit dd89a81d850fa9a65f67b4527c0e420d15bf836c |
| |
| 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-2024-44940 |
| 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: |
| net/ipv4/fou_core.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/a925a200299a6dfc7c172f54da6f374edc930053 |
| https://git.kernel.org/stable/c/b1453a5616c7bd8acd90633ceba4e59105ba3b51 |
| https://git.kernel.org/stable/c/5a2e37bc648a2503bf6d687aed27b9f4455d82eb |
| https://git.kernel.org/stable/c/3db4395332e7050ef9ddeb3052e6b5019f2a2a59 |
| https://git.kernel.org/stable/c/440ab7f97261bc28501636a13998e1b1946d2e79 |
| https://git.kernel.org/stable/c/dd89a81d850fa9a65f67b4527c0e420d15bf836c |
