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Red Hat: CVE-2024-40931: kernel: mptcp: ensure snd_una is properly initialized on connect (Multiple Advisories)

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Red Hat: CVE-2024-40931: kernel: mptcp: ensure snd_una is properly initialized on connect (Multiple Advisories)

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
07/12/2024
Created
09/26/2024
Added
09/25/2024
Modified
12/12/2024

Description

In the Linux kernel, the following vulnerability has been resolved: mptcp: ensure snd_una is properly initialized on connect This is strictly related to commit fb7a0d334894 ("mptcp: ensure snd_nxt is properly initialized on connect"). It turns out that syzkaller can trigger the retransmit after fallback and before processing any other incoming packet - so that snd_una is still left uninitialized. Address the issue explicitly initializing snd_una together with snd_nxt and write_seq.

Solution(s)

  • redhat-upgrade-kernel
  • redhat-upgrade-kernel-rt

References

  • CVE-2024-40931
  • RHSA-2024:7000
  • RHSA-2024:7001
  • RHSA-2024:8617
  • RHSA-2024:9497
  • RHSA-2024:9498
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