CVE-2024-57899 wifi: mac80211: fix mbss changed flags corruption on 32 bit systems
A bit-size mismatch in the Linux kernel's mac80211 subsystem on 32-bit systems causes incorrect bit finding, leading to system crashes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2024-57899?
CVE-2024-57899 is a high-severity vulnerability in Linux kernel, published on 15 Jan 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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]
Which versions are affected by CVE-2024-57899?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-57899?
Apply the vendor's patch.
Is CVE-2024-57899 being exploited?
There is no known exploitation of CVE-2024-57899 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-68576, BELL-CVE-2024-57899, DEBIAN-CVE-2024-57899, GHSA-g55c-36vw-j7gr, ROOT-OS-DEBIAN-11-CVE-2024-57899, ROOT-OS-DEBIAN-12-CVE-2024-57899 and 2 more.