Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: mptcp: fix data stream corruption Maxim reported several issues when forcing a TCP transparent proxy to use the MPTCP protocol for the inbound connections. He also provided a clean reproducer. The problem boils down to 'mptcp_frag_can_collapse_to()' assuming that only MPTCP will use the given page_frag. If others - e.g. the plain TCP protocol - allocate page fragments, we can end-up re-using already allocated memory for mptcp_data_frag. Fix the issue ensuring that the to-be-expanded data fragment is located at the current page frag end. v1 -> v2: - added missing fixes tag (Mat)
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.7, < 5.10.42 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/18e7f0580da15cac1e79d73683ada5a9e70980f8Patch
- https://git.kernel.org/stable/c/29249eac5225429b898f278230a6ca2baa1ae154Patch
- https://git.kernel.org/stable/c/3267a061096efc91eda52c2a0c61ba76e46e4b34Patch
- https://git.kernel.org/stable/c/18e7f0580da15cac1e79d73683ada5a9e70980f8Patch
- https://git.kernel.org/stable/c/29249eac5225429b898f278230a6ca2baa1ae154Patch
- https://git.kernel.org/stable/c/3267a061096efc91eda52c2a0c61ba76e46e4b34Patch
FAQ
What is CVE-2021-47152?
CVE-2021-47152 is a vulnerability with a CVSS score of 5.5 (MEDIUM). In the Linux kernel, the following vulnerability has been resolved: mptcp: fix data stream corruption Maxim reported several issues when forcing a TCP transparent proxy to use the MPTCP protocol for...
How severe is CVE-2021-47152?
CVE-2021-47152 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-47152?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.