| 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-2024-26897: wifi: ath9k: delay all of ath9k_wmi_event_tasklet() until init is complete |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| wifi: ath9k: delay all of ath9k_wmi_event_tasklet() until init is complete |
| |
| The ath9k_wmi_event_tasklet() used in ath9k_htc assumes that all the data |
| structures have been fully initialised by the time it runs. However, because of |
| the order in which things are initialised, this is not guaranteed to be the |
| case, because the device is exposed to the USB subsystem before the ath9k driver |
| initialisation is completed. |
| |
| We already committed a partial fix for this in commit: |
| 8b3046abc99e ("ath9k_htc: fix NULL pointer dereference at ath9k_htc_tx_get_packet()") |
| |
| However, that commit only aborted the WMI_TXSTATUS_EVENTID command in the event |
| tasklet, pairing it with an "initialisation complete" bit in the TX struct. It |
| seems syzbot managed to trigger the race for one of the other commands as well, |
| so let's just move the existing synchronisation bit to cover the whole |
| tasklet (setting it at the end of ath9k_htc_probe_device() instead of inside |
| ath9k_tx_init()). |
| |
| The Linux kernel CVE team has assigned CVE-2024-26897 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.10.136 with commit 78c8397132dd4735ac6a7b5a651302f0b9f264ad and fixed in 5.10.214 with commit 1bc5461a21c56a36e2a7d81e152b90ce019a3905 |
| Issue introduced in 5.15.17 with commit 735aefae7b68025cd04c482a940c0f6fc6797a63 and fixed in 5.15.153 with commit f8ff4b4df71e87f609be0cc37d92e918107f9b90 |
| Issue introduced in 5.17 with commit 8b3046abc99eefe11438090bcc4ec3a3994b55d0 and fixed in 6.1.83 with commit 74d0639261dd795dce958d1b14815bdcbb48a715 |
| Issue introduced in 5.17 with commit 8b3046abc99eefe11438090bcc4ec3a3994b55d0 and fixed in 6.6.23 with commit a015fbf698c8957aa5fbeefc5c59dd2cf3107298 |
| Issue introduced in 5.17 with commit 8b3046abc99eefe11438090bcc4ec3a3994b55d0 and fixed in 6.7.11 with commit ac90e22e735bac44f74b5161fb096fbeb0ff8bc2 |
| Issue introduced in 5.17 with commit 8b3046abc99eefe11438090bcc4ec3a3994b55d0 and fixed in 6.8.2 with commit 4afa0246656d5680c8a4c3fb37ba6570c4ab819b |
| Issue introduced in 5.17 with commit 8b3046abc99eefe11438090bcc4ec3a3994b55d0 and fixed in 6.9 with commit 24355fcb0d4cbcb6ddda262596558e8cfba70f11 |
| Issue introduced in 5.16.3 with commit 7bbc1a50a7963f14048f0e54b0b73159f86d4ea3 |
| |
| 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-2024-26897 |
| 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/ath/ath9k/htc.h |
| drivers/net/wireless/ath/ath9k/htc_drv_init.c |
| drivers/net/wireless/ath/ath9k/htc_drv_txrx.c |
| drivers/net/wireless/ath/ath9k/wmi.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/1bc5461a21c56a36e2a7d81e152b90ce019a3905 |
| https://git.kernel.org/stable/c/f8ff4b4df71e87f609be0cc37d92e918107f9b90 |
| https://git.kernel.org/stable/c/74d0639261dd795dce958d1b14815bdcbb48a715 |
| https://git.kernel.org/stable/c/a015fbf698c8957aa5fbeefc5c59dd2cf3107298 |
| https://git.kernel.org/stable/c/ac90e22e735bac44f74b5161fb096fbeb0ff8bc2 |
| https://git.kernel.org/stable/c/4afa0246656d5680c8a4c3fb37ba6570c4ab819b |
| https://git.kernel.org/stable/c/24355fcb0d4cbcb6ddda262596558e8cfba70f11 |
