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CVE PROGRAM SOURCE RECORD8.2 High

CVE-2021-47244

mptcp: Fix out of bounds when parsing TCP options

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Status
Published
Published
Updated
Assigning organization
Linux

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.").

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • cec37a6e41aae7bf3df9a3da783380a4d9325fd8 to < 73eeba71dc9932970befa009e68272a3d5ec4a58affected
  • cec37a6e41aae7bf3df9a3da783380a4d9325fd8 to < 76e02b8905d0691e89e104a882f3bba7dd0f6037affected
  • cec37a6e41aae7bf3df9a3da783380a4d9325fd8 to < 07718be265680dcf496347d475ce1a5442f55ad7affected

Linux Linux

Default version status: affected

  • 5.6affected
  • 0 to < 5.6unaffected
  • 5.10.46 to ≤ 5.10.*unaffected
  • 5.12.13 to ≤ 5.12.*unaffected
  • 5.13 to ≤ *unaffected

References