PT-2024-8010 · Linux+8 · Linux Kernel+8
Syzbot
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Published
2024-08-05
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Updated
2026-03-14
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CVE-2024-44934
CVSS v3.1
7.8
High
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 6.6.50
Description
A use-after-free vulnerability has been identified in the Linux kernel, specifically in the net/bridge/br multicast.c module. This issue arises because the bridge does not ensure that all previous garbage collection cycles have been completed before removing a port. As a result, a port can be freed while group timers are still running, leading to a use-after-free condition. The vulnerability can be exploited to impact the confidentiality, integrity, and availability of protected information.
Recommendations
To resolve this issue, update the Linux kernel to version 6.6.50 or later. If updating is not feasible, consider temporarily disabling the
br multicast port group expired() function or restricting access to the vulnerable module until a patch is available. Additionally, ensure that all previous garbage collection cycles have finished before freeing a port by using flush work before freeing the port.Exploit
Fix
DoS
Use After Free
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Astra Linux
Debian
Linuxmint
Linux Kernel
Red Hat
Red Os
Suse
Ubuntu