Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected d0876b2284cf8b34dd214b2d0aa21071c345da59 before 35b31f5549ede4070566b949781e83495906b43d; affected d0876b2284cf8b34dd214b2d0aa21071c345da59 before 85b866e4c4e63a1d7afb58f1e24273caad03d0b7; affected d0876b2284cf8b34dd214b2d0aa21071c345da59 before d20bf2c96d7ffd171299b32f562f70e5bf5dc608; affected d0876b2284cf8b34dd214b2d0aa21071c345da59 before 2060f1efab370b496c4903b840844ecaff324c3c; affected d0876b2284cf8b34dd214b2d0aa21071c345da59 before 1c1f721375989579e46741f59523e39ec9b2a9bd |
| Linux / Linux | affected 5.10; unaffected 0 before 5.10; unaffected 5.15.167 through 5.15.*; unaffected 6.1.107 through 6.1.*; unaffected 6.6.48 through 6.6.*; unaffected 6.10.7 through 6.10.*; unaffected 6.11 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/35b31f5549ede4070566b949781e83495906b43d
- https://git.kernel.org/stable/c/85b866e4c4e63a1d7afb58f1e24273caad03d0b7
- https://git.kernel.org/stable/c/d20bf2c96d7ffd171299b32f562f70e5bf5dc608
- https://git.kernel.org/stable/c/2060f1efab370b496c4903b840844ecaff324c3c
- https://git.kernel.org/stable/c/1c1f721375989579e46741f59523e39ec9b2a9bd
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.