PT-2024-31361 · Linux+8 · Linux Kernel+8
Published
2024-08-20
·
Updated
2026-03-14
·
CVE-2024-45009
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 is related to the Linux kernel's handling of the
add addr accepted counter in the mptcp module. When a 'subflow' endpoint is removed, it triggers a RM ADDR and then the subflow closure. However, before the patch, the other peer would try to decrement the add addr accepted counter upon receiving the RM ADDR, which is incorrect because the attached subflows were not created upon the reception of an ADD ADDR. The solution is to decrement the counter only if the attached subflow was an MP JOIN to a remote id that was not 0, and initiated by the host receiving the RM ADDR. The WARN ON ONCE warning was added to help find the bug when running the "remove single subflow" subtest from the mptcp join.sh selftest.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
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Weakness Enumeration
Related Identifiers
Affected Products
Alt Linux
Astra Linux
Debian
Linuxmint
Linux Kernel
Red Hat
Red Os
Suse
Ubuntu