CVE-2021-47152
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.
Does this matter?
Lower severity and a low EPSS score (0.24%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.24% probability · 15th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-787
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
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
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.