Linux MPTCP Subflow Management Logic Fix in pm_netlink.c

From this webpage screenshot, we can extract the following key information about the vulnerability: 1. Vulnerability Description: - Issue: and were incorrectly decremented because they are unrelated to the initial subflow. - Cause: These addresses are associated with the source and destination addresses of the initial subflow, which are known from the start not to be considered "additional local addresses used" or "ADD_ADDR accepted". 2. Fix: - Modification: No longer increment these addresses when a subflow entry is removed and re-added. - Impact: Without this fix, a subflow entry could not be removed and re-added more than once. 3. Reporting and Verification: - Reporter: Arinc UNAL - Verifiers: Mat Martineau and Paolo Abeni - Signers: Matthieu Baerts and Greg Kroah-Hartman 4. Patch Details: - File: - Modification Location: -627,12 +627,13 - Changes: - Removed the decrement operation for . - Added an increment operation for to ensure it is not incorrectly decremented when a subflow entry is removed and re-added. 5. Related Issues and Fixes: - Related Issue: https://github.com/multipath-tcp/mptcp_net-next/issues/512 - Fix Pull Request: https://github.com/multipath-tcp/mptcp_net-next/pull/512 This information indicates that the vulnerability relates to subflow management in the Multipath TCP (MPTCP) protocol, and the fix corrects the erroneous decrements of and when a subflow entry is removed and re-added.

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Linux MPTCP Subflow Management Logic Fix in pm_netlink.c