| From bippy-5f407fcff5a0 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2024-46711: mptcp: pm: fix ID 0 endp usage after multiple re-creations |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| mptcp: pm: fix ID 0 endp usage after multiple re-creations |
| |
| 'local_addr_used' and 'add_addr_accepted' are decremented for addresses |
| not related to the initial subflow (ID0), because the source and |
| destination addresses of the initial subflows are known from the |
| beginning: they don't count as "additional local address being used" or |
| "ADD_ADDR being accepted". |
| |
| It is then required not to increment them when the entrypoint used by |
| the initial subflow is removed and re-added during a connection. Without |
| this modification, this entrypoint cannot be removed and re-added more |
| than once. |
| |
| The Linux kernel CVE team has assigned CVE-2024-46711 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 6.0 with commit 3ad14f54bd7448384458e69f0183843f683ecce8 and fixed in 6.1.109 with commit c9c744666f7308a4daba520191e29d395260bcfe |
| Issue introduced in 6.0 with commit 3ad14f54bd7448384458e69f0183843f683ecce8 and fixed in 6.6.49 with commit 53e2173172d26c0617b29dd83618b71664bed1fb |
| Issue introduced in 6.0 with commit 3ad14f54bd7448384458e69f0183843f683ecce8 and fixed in 6.10.8 with commit 119806ae4e46cf239db8e6ad92bc2fd3daae86dc |
| Issue introduced in 6.0 with commit 3ad14f54bd7448384458e69f0183843f683ecce8 and fixed in 6.11 with commit 9366922adc6a71378ca01f898c41be295309f044 |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2024-46711 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| net/mptcp/pm_netlink.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/c9c744666f7308a4daba520191e29d395260bcfe |
| https://git.kernel.org/stable/c/53e2173172d26c0617b29dd83618b71664bed1fb |
| https://git.kernel.org/stable/c/119806ae4e46cf239db8e6ad92bc2fd3daae86dc |
| https://git.kernel.org/stable/c/9366922adc6a71378ca01f898c41be295309f044 |
