| 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-2023-53071: wifi: mt76: do not run mt76_unregister_device() on unregistered hw |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| wifi: mt76: do not run mt76_unregister_device() on unregistered hw |
| |
| Trying to probe a mt7921e pci card without firmware results in a |
| successful probe where ieee80211_register_hw hasn't been called. When |
| removing the driver, ieee802111_unregister_hw is called unconditionally |
| leading to a kernel NULL pointer dereference. |
| Fix the issue running mt76_unregister_device routine just for registered |
| hw. |
| |
| The Linux kernel CVE team has assigned CVE-2023-53071 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.18 with commit 1c71e03afe4b457a15e50de40006b927dfc00755 and fixed in 6.1.113 with commit dffe86df26aee01a5fc56a175b7a7f157961e370 |
| Issue introduced in 5.18 with commit 1c71e03afe4b457a15e50de40006b927dfc00755 and fixed in 6.2.9 with commit 2d34f27714c97a9786a30b3bb54944d6d8ed612f |
| Issue introduced in 5.18 with commit 1c71e03afe4b457a15e50de40006b927dfc00755 and fixed in 6.3 with commit 41130c32f3a18fcc930316da17f3a5f3bc326aa1 |
| |
| 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-2023-53071 |
| 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/mediatek/mt76/mac80211.c |
| drivers/net/wireless/mediatek/mt76/mt76.h |
| |
| |
| 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/dffe86df26aee01a5fc56a175b7a7f157961e370 |
| https://git.kernel.org/stable/c/2d34f27714c97a9786a30b3bb54944d6d8ed612f |
| https://git.kernel.org/stable/c/41130c32f3a18fcc930316da17f3a5f3bc326aa1 |
