Use After Free Affecting kernel-cross-headers package, versions *
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Test your applications- Snyk ID SNYK-RHEL8-KERNELCROSSHEADERS-7909905
- published 5 Sep 2024
- disclosed 4 Sep 2024
Introduced: 4 Sep 2024
CVE-2024-44974 Open this link in a new tabHow to fix?
There is no fixed version for RHEL:8 kernel-cross-headers.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-cross-headers package and not the kernel-cross-headers package as distributed by RHEL.
See How to fix? for RHEL:8 relevant fixed versions and status.
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.
References
- https://access.redhat.com/security/cve/CVE-2024-44974
- https://git.kernel.org/stable/c/0201d65d9806d287a00e0ba96f0321835631f63f
- https://git.kernel.org/stable/c/48e50dcbcbaaf713d82bf2da5c16aeced94ad07d
- https://git.kernel.org/stable/c/9a9afbbc3fbfca4975eea4aa5b18556db5a0c0b8
- https://git.kernel.org/stable/c/2b4f46f9503633dade75cb796dd1949d0e6581a1
- https://git.kernel.org/stable/c/ddee5b4b6a1cc03c1e9921cf34382e094c2009f1
- https://git.kernel.org/stable/c/f2c865e9e3ca44fc06b5f73b29a954775e4dbb38