PT-2024-35509 · Linux+4 · Linux Kernel+4
Published
2024-10-29
·
Updated
2025-09-29
·
CVE-2024-53044
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The issue arises when the
tc qdisc command is used with the same block index for both ingress and egress, causing the xa insert() function to fail. This failure leads to an irrecoverable state where the FLOW BLOCK BIND command is emitted but not followed by a corresponding FLOW BLOCK UNBIND. The problem is exacerbated by the fact that the clsact init() function obtains the same pointer for both ingress and egress blocks, resulting in the dev being added to the block->ports xarray twice. The estimated number of potentially affected devices is not provided. There is no information about real-world incidents where this issue was exploited.Recommendations
To fix the bug, the correct error teardown path needs to be filled, and
tcf block offload unbind() should be called when xa insert() fails. As a temporary workaround, consider rebooting the system or unbinding and rebinding the net device driver to recover from the irrecoverable state. At the moment, there is no information about a newer version that contains a fix for this vulnerability.Exploit
Found an issue in the description? Have something to add? Feel free to write us 👾
Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Linuxmint
Linux Kernel
Red Hat
Ubuntu