| 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-2024-26693: wifi: iwlwifi: mvm: fix a crash when we run out of stations |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| wifi: iwlwifi: mvm: fix a crash when we run out of stations |
| |
| A DoS tool that injects loads of authentication frames made our AP |
| crash. The iwl_mvm_is_dup() function couldn't find the per-queue |
| dup_data which was not allocated. |
| |
| The root cause for that is that we ran out of stations in the firmware |
| and we didn't really add the station to the firmware, yet we didn't |
| return an error to mac80211. |
| Mac80211 was thinking that we have the station and because of that, |
| sta_info::uploaded was set to 1. This allowed |
| ieee80211_find_sta_by_ifaddr() to return a valid station object, but |
| that ieee80211_sta didn't have any iwl_mvm_sta object initialized and |
| that caused the crash mentioned earlier when we got Rx on that station. |
| |
| The Linux kernel CVE team has assigned CVE-2024-26693 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.4 with commit 57974a55d995468a9a476e24693eb741c649b25f and fixed in 6.6.18 with commit 00f4eb31b8193f6070ce24df636883f9c104ca95 |
| Issue introduced in 6.4 with commit 57974a55d995468a9a476e24693eb741c649b25f and fixed in 6.7.6 with commit c12f0f4d4caf23b1bfdc2602b6b70d56bdcd6aa7 |
| Issue introduced in 6.4 with commit 57974a55d995468a9a476e24693eb741c649b25f and fixed in 6.8 with commit b7198383ef2debe748118996f627452281cf27d7 |
| |
| 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-2024-26693 |
| 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/wireless/intel/iwlwifi/mvm/mac80211.c |
| drivers/net/wireless/intel/iwlwifi/mvm/rxmq.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/00f4eb31b8193f6070ce24df636883f9c104ca95 |
| https://git.kernel.org/stable/c/c12f0f4d4caf23b1bfdc2602b6b70d56bdcd6aa7 |
| https://git.kernel.org/stable/c/b7198383ef2debe748118996f627452281cf27d7 |
