| 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-2021-47251: mac80211: fix skb length check in ieee80211_scan_rx() |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| mac80211: fix skb length check in ieee80211_scan_rx() |
| |
| Replace hard-coded compile-time constants for header length check |
| with dynamic determination based on the frame type. Otherwise, we |
| hit a validation WARN_ON in cfg80211 later. |
| |
| [style fixes, reword commit message] |
| |
| The Linux kernel CVE team has assigned CVE-2021-47251 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.10 with commit cd418ba63f0c2f6157f35a41c9accc6ecb52590a and fixed in 5.10.46 with commit 5a1cd67a801cf5ef989c4783e07b86a25b143126 |
| Issue introduced in 5.10 with commit cd418ba63f0c2f6157f35a41c9accc6ecb52590a and fixed in 5.12.13 with commit d1b949c70206178b12027f66edc088d40375b5cb |
| Issue introduced in 5.10 with commit cd418ba63f0c2f6157f35a41c9accc6ecb52590a and fixed in 5.13 with commit e298aa358f0ca658406d524b6639fe389cb6e11e |
| |
| 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-2021-47251 |
| 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/scan.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/5a1cd67a801cf5ef989c4783e07b86a25b143126 |
| https://git.kernel.org/stable/c/d1b949c70206178b12027f66edc088d40375b5cb |
| https://git.kernel.org/stable/c/e298aa358f0ca658406d524b6639fe389cb6e11e |
