| 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-2024-26683: wifi: cfg80211: detect stuck ECSA element in probe resp |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| wifi: cfg80211: detect stuck ECSA element in probe resp |
| |
| We recently added some validation that we don't try to |
| connect to an AP that is currently in a channel switch |
| process, since that might want the channel to be quiet |
| or we might not be able to connect in time to hear the |
| switching in a beacon. This was in commit c09c4f31998b |
| ("wifi: mac80211: don't connect to an AP while it's in |
| a CSA process"). |
| |
| However, we promptly got a report that this caused new |
| connection failures, and it turns out that the AP that |
| we now cannot connect to is permanently advertising an |
| extended channel switch announcement, even with quiet. |
| The AP in question was an Asus RT-AC53, with firmware |
| 3.0.0.4.380_10760-g21a5898. |
| |
| As a first step, attempt to detect that we're dealing |
| with such a situation, so mac80211 can use this later. |
| |
| The Linux kernel CVE team has assigned CVE-2024-26683 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.7 with commit c09c4f31998bac6d73508e38812518aceb069b68 and fixed in 6.7.5 with commit ce112c941c2b172afba3e913a90c380647d53975 |
| Issue introduced in 6.7 with commit c09c4f31998bac6d73508e38812518aceb069b68 and fixed in 6.8 with commit 177fbbcb4ed6b306c1626a277fac3fb1c495a4c7 |
| |
| 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-2024-26683 |
| 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: |
| include/net/cfg80211.h |
| net/wireless/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/ce112c941c2b172afba3e913a90c380647d53975 |
| https://git.kernel.org/stable/c/177fbbcb4ed6b306c1626a277fac3fb1c495a4c7 |
