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CVE-2021-47244

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CVE-2021-47244

Published: May 21, 2024

Modified: May 11, 2026

PUBLISHED

Description

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.").

VendorProductVersions

Linux

Linux

affected
cec37a6e41aae7bf3df9a3da783380a4d9325fd8 - < 73eeba71dc9932970befa009e68272a3d5ec4a58
affected
cec37a6e41aae7bf3df9a3da783380a4d9325fd8 - < 76e02b8905d0691e89e104a882f3bba7dd0f6037
affected
cec37a6e41aae7bf3df9a3da783380a4d9325fd8 - < 07718be265680dcf496347d475ce1a5442f55ad7

Linux

Linux

affected
5.6
unaffected
0 - < 5.6
unaffected
5.10.46 - <= 5.10.*
unaffected
5.12.13 - <= 5.12.*
unaffected
5.13 - <= *

References

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