| 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-2024-57899: wifi: mac80211: fix mbss changed flags corruption on 32 bit systems |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| wifi: mac80211: fix mbss changed flags corruption on 32 bit systems |
| |
| On 32-bit systems, the size of an unsigned long is 4 bytes, |
| while a u64 is 8 bytes. Therefore, when using |
| or_each_set_bit(bit, &bits, sizeof(changed) * BITS_PER_BYTE), |
| the code is incorrectly searching for a bit in a 32-bit |
| variable that is expected to be 64 bits in size, |
| leading to incorrect bit finding. |
| |
| Solution: Ensure that the size of the bits variable is correctly |
| adjusted for each architecture. |
| |
| Call Trace: |
| ? show_regs+0x54/0x58 |
| ? __warn+0x6b/0xd4 |
| ? ieee80211_link_info_change_notify+0xcc/0xd4 [mac80211] |
| ? report_bug+0x113/0x150 |
| ? exc_overflow+0x30/0x30 |
| ? handle_bug+0x27/0x44 |
| ? exc_invalid_op+0x18/0x50 |
| ? handle_exception+0xf6/0xf6 |
| ? exc_overflow+0x30/0x30 |
| ? ieee80211_link_info_change_notify+0xcc/0xd4 [mac80211] |
| ? exc_overflow+0x30/0x30 |
| ? ieee80211_link_info_change_notify+0xcc/0xd4 [mac80211] |
| ? ieee80211_mesh_work+0xff/0x260 [mac80211] |
| ? cfg80211_wiphy_work+0x72/0x98 [cfg80211] |
| ? process_one_work+0xf1/0x1fc |
| ? worker_thread+0x2c0/0x3b4 |
| ? kthread+0xc7/0xf0 |
| ? mod_delayed_work_on+0x4c/0x4c |
| ? kthread_complete_and_exit+0x14/0x14 |
| ? ret_from_fork+0x24/0x38 |
| ? kthread_complete_and_exit+0x14/0x14 |
| ? ret_from_fork_asm+0xf/0x14 |
| ? entry_INT80_32+0xf0/0xf0 |
| |
| [restore no-op path for no changes] |
| |
| The Linux kernel CVE team has assigned CVE-2024-57899 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Fixed in 6.6.70 with commit 86772872f9f5097cd03d0e1c6813238bd38c250b |
| Fixed in 6.12.9 with commit 36b739637d7042843f9df57212ecee6ed6e0d4b2 |
| Fixed in 6.13 with commit 49dba1ded8dd5a6a12748631403240b2ab245c34 |
| |
| 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-2024-57899 |
| 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/mesh.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/86772872f9f5097cd03d0e1c6813238bd38c250b |
| https://git.kernel.org/stable/c/36b739637d7042843f9df57212ecee6ed6e0d4b2 |
| https://git.kernel.org/stable/c/49dba1ded8dd5a6a12748631403240b2ab245c34 |
