AZL-49263
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-49263.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/AZL-49263
- Upstream
- Published
- 2024-09-11T16:15:06Z
- Modified
- 2026-04-01T05:16:09.688590Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- CVE-2024-45010 affecting package kernel for versions less than 6.6.51.1-1
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
mptcp: pm: only mark 'subflow' endp as available
Adding the following warning ...
WARNONONCE(msk->pm.localaddrused == 0)
... before decrementing the localaddrused counter helped to find a bug when running the "remove single address" subtest from the mptcp_join.sh selftests.
Removing a 'signal' endpoint will trigger the removal of all subflows linked to this endpoint via mptcppmnlrmaddrorsubflow() with rmtype == MPTCPMIBRMSUBFLOW. This will decrement the localaddr_used counter, which is wrong in this case because this counter is linked to 'subflow' endpoints, and here it is a 'signal' endpoint that is being removed.
Now, the counter is decremented, only if the ID is being used outside of mptcppmnlrmaddrorsubflow(), only for 'subflow' endpoints, and if the ID is not 0 -- localaddrused is not taking into account these ones. This marking of the ID as being available, and the decrement is done no matter if a subflow using this ID is currently available, because the subflow could have been closed before.
- References