| 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-2024-44974: mptcp: pm: avoid possible UaF when selecting endp |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| mptcp: pm: avoid possible UaF when selecting endp |
| |
| select_local_address() and select_signal_address() both select an |
| endpoint entry from the list inside an RCU protected section, but return |
| a reference to it, to be read later on. If the entry is dereferenced |
| after the RCU unlock, reading info could cause a Use-after-Free. |
| |
| A simple solution is to copy the required info while inside the RCU |
| protected section to avoid any risk of UaF later. The address ID might |
| need to be modified later to handle the ID0 case later, so a copy seems |
| OK to deal with. |
| |
| The Linux kernel CVE team has assigned CVE-2024-44974 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.7 with commit 01cacb00b35cb62b139f07d5f84bcf0eeda8eff6 and fixed in 5.10.226 with commit ddee5b4b6a1cc03c1e9921cf34382e094c2009f1 |
| Issue introduced in 5.7 with commit 01cacb00b35cb62b139f07d5f84bcf0eeda8eff6 and fixed in 5.15.167 with commit f2c865e9e3ca44fc06b5f73b29a954775e4dbb38 |
| Issue introduced in 5.7 with commit 01cacb00b35cb62b139f07d5f84bcf0eeda8eff6 and fixed in 6.1.109 with commit 2b4f46f9503633dade75cb796dd1949d0e6581a1 |
| Issue introduced in 5.7 with commit 01cacb00b35cb62b139f07d5f84bcf0eeda8eff6 and fixed in 6.6.48 with commit 9a9afbbc3fbfca4975eea4aa5b18556db5a0c0b8 |
| Issue introduced in 5.7 with commit 01cacb00b35cb62b139f07d5f84bcf0eeda8eff6 and fixed in 6.10.7 with commit 0201d65d9806d287a00e0ba96f0321835631f63f |
| Issue introduced in 5.7 with commit 01cacb00b35cb62b139f07d5f84bcf0eeda8eff6 and fixed in 6.11 with commit 48e50dcbcbaaf713d82bf2da5c16aeced94ad07d |
| |
| 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-2024-44974 |
| 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/ddee5b4b6a1cc03c1e9921cf34382e094c2009f1 |
| https://git.kernel.org/stable/c/f2c865e9e3ca44fc06b5f73b29a954775e4dbb38 |
| https://git.kernel.org/stable/c/2b4f46f9503633dade75cb796dd1949d0e6581a1 |
| https://git.kernel.org/stable/c/9a9afbbc3fbfca4975eea4aa5b18556db5a0c0b8 |
| https://git.kernel.org/stable/c/0201d65d9806d287a00e0ba96f0321835631f63f |
| https://git.kernel.org/stable/c/48e50dcbcbaaf713d82bf2da5c16aeced94ad07d |
