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redhatcveRedhat.comRH:CVE-2021-47244
HistoryMay 23, 2024 - 2:03 p.m.

CVE-2021-47244

2024-05-2314:03:08
redhat.com
access.redhat.com
1
linux kernel
cve-2021-47244
mptcp
out of bounds
tcp options
vulnerability
mitigation

6.6 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

15.5%

In the Linux kernel, the following vulnerability has been resolved: mptcp: Fix out of bounds when parsing TCP options The TCP option parser in mptcp (mptcp_get_options) could read one byte out of bounds. When the length is 1, the execution flow gets into the loop, reads one byte of the opcode, and if the opcode is neither TCPOPT_EOL nor TCPOPT_NOP, it reads one more byte, which exceeds the length of 1. This fix is inspired by commit 9609dad263f8 (“ipv4: tcp_input: fix stack out of bounds when parsing TCP options.”).

6.6 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

15.5%