First published: Wed Sep 11 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: only decrement add_addr_accepted for MPJ req Adding the following warning ... WARN_ON_ONCE(msk->pm.add_addr_accepted == 0) ... before decrementing the add_addr_accepted counter helped to find a bug when running the "remove single subflow" subtest from the mptcp_join.sh selftest. Removing a 'subflow' endpoint will first trigger a RM_ADDR, then the subflow closure. Before this patch, and upon the reception of the RM_ADDR, the other peer will then try to decrement this add_addr_accepted. That's not correct because the attached subflows have not been created upon the reception of an ADD_ADDR. A way to solve that 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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Software | Affected Version | How to fix |
---|---|---|
Linux Linux kernel | >=5.10<5.15.167 | |
Linux Linux kernel | >=5.16<6.1.107 | |
Linux Linux kernel | >=6.2<6.6.48 | |
Linux Linux kernel | >=6.7<6.10.7 | |
Linux Linux kernel | =6.11-rc1 | |
Linux Linux kernel | =6.11-rc2 | |
Linux Linux kernel | =6.11-rc3 | |
Linux Linux kernel | =6.11-rc4 |
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