| 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-2021-47602: mac80211: track only QoS data frames for admission control |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| mac80211: track only QoS data frames for admission control |
| |
| For admission control, obviously all of that only works for |
| QoS data frames, otherwise we cannot even access the QoS |
| field in the header. |
| |
| Syzbot reported (see below) an uninitialized value here due |
| to a status of a non-QoS nullfunc packet, which isn't even |
| long enough to contain the QoS header. |
| |
| Fix this to only do anything for QoS data packets. |
| |
| The Linux kernel CVE team has assigned CVE-2021-47602 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 3.19 with commit 02219b3abca59fca81711bfe7ee78df7abad97ce and fixed in 4.19.222 with commit 69f054d6642c8f6173724ce17e7ee3ff66b8f682 |
| Issue introduced in 3.19 with commit 02219b3abca59fca81711bfe7ee78df7abad97ce and fixed in 5.4.168 with commit 46b9e29db2012a4d2a40a26101862e002ccf387b |
| Issue introduced in 3.19 with commit 02219b3abca59fca81711bfe7ee78df7abad97ce and fixed in 5.10.88 with commit eed897a22230e3231a740eddd7d6d95ba476625f |
| Issue introduced in 3.19 with commit 02219b3abca59fca81711bfe7ee78df7abad97ce and fixed in 5.15.11 with commit 42d08e97b196479f593499e887a9ab81446a34b9 |
| Issue introduced in 3.19 with commit 02219b3abca59fca81711bfe7ee78df7abad97ce and fixed in 5.16 with commit d5e568c3a4ec2ddd23e7dc5ad5b0c64e4f22981a |
| |
| 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-2021-47602 |
| 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/mac80211/mlme.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/69f054d6642c8f6173724ce17e7ee3ff66b8f682 |
| https://git.kernel.org/stable/c/46b9e29db2012a4d2a40a26101862e002ccf387b |
| https://git.kernel.org/stable/c/eed897a22230e3231a740eddd7d6d95ba476625f |
| https://git.kernel.org/stable/c/42d08e97b196479f593499e887a9ab81446a34b9 |
| https://git.kernel.org/stable/c/d5e568c3a4ec2ddd23e7dc5ad5b0c64e4f22981a |
