Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: mptcp: avoid unneeded actions on subflow reset Once in a blue moon, the mptcp receive path can recursively call mptcp_data_ready() via state change under unlucky error conditions, and then try to hold the data lock again. Break the recursion loop explicitly checking for the exceptional condition. Add a new flag instead of using an existing one like 'closing', to exit early in subflow_state_change(), and explicitly flush the RX queue at reset time. This avoids unneeded processing to check for available data -- calling get_mapping_status() and more on a dying subflow -- but also in error reporting and worker scheduling. Note that we must consume the currently peeked skb before invoking mptcp_dss_corruption to avoid consuming it again after the eventual reset has freed it.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected fde99e972b8f88cebe619241d7aa43d288ef666a before 6d669c740933124eae3df8cfc15995af9bcc6aba; affected 12c1676d598e3b8dd92a033b623b792cc2ea1ec5 before 83a7dcdd2b1060484528da70a643125174d47e5a; affected 35668f8ec84f6c944676e48ecc6bbc5fc8e6fe25 before a370e56024df0b07e3120c45a9773ae123819fd6; affected b8be15d1ae7ea4eedd547c3b3141f592fbddcd30 before 1962841387087970d75ba8b8d4c2aa2d45705e50; affected e32d262c89e2b22cb0640223f953b548617ed8a6 before 4b7abdcb5ba832fafab679f0d998af39cbc99307; affected e32d262c89e2b22cb0640223f953b548617ed8a6 before b2dbcc1ed48b5ac070a41db4a52aade6823c4df0; affected e32d262c89e2b22cb0640223f953b548617ed8a6 before ce7e4ede01ed3e47a48c0f1ce1d87bf4864bee9f; affected e32d262c89e2b22cb0640223f953b548617ed8a6 before 2b0f561f21b27c40c91ea4975268a06092bd7e9c; affected 8bfd391bde685df7289b928ce8876a3583be4bfb; affected 5.10.228 before 5.10.271; affected 5.15.169 before 5.15.222; affected 6.1.113 before 6.1.189; affected 6.6.57 before 6.6.158; affected 6.11.4 before 6.12 |
| Linux / Linux | affected 6.12; unaffected 0 before 6.12; unaffected 5.10.271 through 5.10.*; unaffected 5.15.222 through 5.15.*; unaffected 6.1.189 through 6.1.*; unaffected 6.6.158 through 6.6.*; unaffected 6.12.111 through 6.12.*; unaffected 6.18.53 through 6.18.*; unaffected 7.2.7 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/6d669c740933124eae3df8cfc15995af9bcc6aba
- https://git.kernel.org/stable/c/83a7dcdd2b1060484528da70a643125174d47e5a
- https://git.kernel.org/stable/c/a370e56024df0b07e3120c45a9773ae123819fd6
- https://git.kernel.org/stable/c/1962841387087970d75ba8b8d4c2aa2d45705e50
- https://git.kernel.org/stable/c/4b7abdcb5ba832fafab679f0d998af39cbc99307
- https://git.kernel.org/stable/c/b2dbcc1ed48b5ac070a41db4a52aade6823c4df0
- https://git.kernel.org/stable/c/ce7e4ede01ed3e47a48c0f1ce1d87bf4864bee9f
- https://git.kernel.org/stable/c/2b0f561f21b27c40c91ea4975268a06092bd7e9c