medium
5.5
CWE
369 362
Advisory Published
Updated

CVE-2024-53122: mptcp: cope racing subflow creation in mptcp_rcv_space_adjust

First published: Mon Dec 02 2024(Updated: )

In the Linux kernel, the following vulnerability has been resolved: mptcp: cope racing subflow creation in mptcp_rcv_space_adjust Additional active subflows - i.e. created by the in kernel path manager - are included into the subflow list before starting the 3whs. A racing recvmsg() spooling data received on an already established subflow would unconditionally call tcp_cleanup_rbuf() on all the current subflows, potentially hitting a divide by zero error on the newly created ones. Explicitly check that the subflow is in a suitable state before invoking tcp_cleanup_rbuf().

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Affected SoftwareAffected VersionHow to fix
Linux Kernel>=5.10<6.1.119
Linux Kernel>=6.2<6.6.63
Linux Kernel>=6.7<6.11.10
Linux Kernel=6.12-rc1
Linux Kernel=6.12-rc2
Linux Kernel=6.12-rc3
Linux Kernel=6.12-rc4
Linux Kernel=6.12-rc5
Linux Kernel=6.12-rc6
Linux Kernel=6.12-rc7
debian/linux<=5.10.223-1<=5.10.234-1
6.1.129-1
6.1.128-1
6.12.20-1
6.12.21-1
debian/linux-6.1
6.1.129-1~deb11u1

Remedy

https://git.kernel.org/stable/c/24995851d58c4a205ad0ffa7b2f21e479a9c8527

Remedy

https://git.kernel.org/stable/c/aad6412c63baa39dd813e81f16a14d976b3de2e8

Remedy

https://git.kernel.org/stable/c/ce7356ae35943cc6494cc692e62d51a734062b7d

Remedy

https://git.kernel.org/stable/c/ff825ab2f455299c0c7287550915a8878e2a66e0

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2024-53122?

    CVE-2024-53122 has been classified with a moderate severity level due to potential impacts on network stability.

  • How do I fix CVE-2024-53122?

    To address CVE-2024-53122, update the Linux kernel to version 6.1.119 or later, or apply the relevant patches provided by your distribution.

  • Which versions of the Linux kernel are affected by CVE-2024-53122?

    CVE-2024-53122 affects Linux kernel versions between 5.10 and 6.11.10, as well as specific 6.12 release candidates.

  • What areas of the Linux kernel are impacted by CVE-2024-53122?

    CVE-2024-53122 impacts the multipath TCP implementation, specifically related to subflow creation.

  • Is CVE-2024-53122 exploitable remotely?

    Yes, CVE-2024-53122 could potentially be exploited remotely, which raises concerns for systems exposed to untrusted networks.

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