CVE-2024-44974

Published: September 5, 2024Last modified: September 5, 2024

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.

Severity score breakdown

Status

References

• https://git.kernel.org/stable/c/0201d65d9806d287a00e0ba96f0321835631f63f
• https://git.kernel.org/stable/c/2b4f46f9503633dade75cb796dd1949d0e6581a1
• https://git.kernel.org/stable/c/48e50dcbcbaaf713d82bf2da5c16aeced94ad07d
• https://git.kernel.org/stable/c/9a9afbbc3fbfca4975eea4aa5b18556db5a0c0b8
• https://git.kernel.org/stable/c/ddee5b4b6a1cc03c1e9921cf34382e094c2009f1
• https://git.kernel.org/stable/c/f2c865e9e3ca44fc06b5f73b29a954775e4dbb38