CVE-2024-40931: mptcp: ensure snd_una is properly initialized on connect

Published Jul 12, 2024
·
Updated

In the Linux kernel, the following vulnerability has been resolved:

mptcp: ensure snduna is properly initialized on connect

This is strictly related to commit fb7a0d334894 ("mptcp: ensure sndnxt 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 snduna is still left uninitialized.

Address the issue explicitly initializing snduna together with sndnxt and writeseq.

Affected Software

20 affected componentsFixes available
Linux Linux kernel>=5.9<5.10.221
Linux Linux kernel>=5.11<5.15.162
Linux Linux kernel>=5.16<6.1.95
Linux Linux kernel>=6.2<6.6.35
Linux Linux kernel>=6.7<6.9.6
Linux Linux kernel=6.10-rc1
Linux Linux kernel=6.10-rc2
Linux Linux kernel=6.10-rc3
IBM Security Verify Governance<=ISVG 10.0.2
IBM Security Verify Governance, Identity Manager Software Stack<=ISVG 10.0.2
IBM Security Verify Governance, Identity Manager Virtual Appliance<=ISVG 10.0.2
IBM Security Verify Governance Identity Manager Container<=ISVG 10.0.2
debian/linux
5.10.223-15.10.234-16.1.129-16.1.135-16.12.25-1
debian/linux-6.1
6.1.129-1~deb11u1
redhat/kernel<5.10.221
5.10.221
redhat/kernel<5.15.162
5.15.162
redhat/kernel<6.1.95
6.1.95
redhat/kernel<6.6.35
6.6.35
redhat/kernel<6.9.6
6.9.6
redhat/kernel<6.10
6.10

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade debian/linux to a version that resolves this vulnerability.

    Fixed in 5.10.223-1Fixed in 5.10.234-1Fixed in 6.1.129-1Fixed in 6.1.135-1Fixed in 6.12.25-1
  2. Upgrade

    Upgrade debian/linux-6.1 to a version that resolves this vulnerability.

    Fixed in 6.1.129-1~deb11u1
  3. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 5.10.221
  4. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 5.15.162
  5. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 6.1.95
  6. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 6.6.35
  7. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 6.9.6
  8. Upgrade

    Upgrade redhat/kernel to a version that resolves this vulnerability.

    Fixed in 6.10

Event History

Jul 12, 2024
CVE Published
via MITRE·12:25 PM
Data Sourced
via MITRE·12:25 PM
Description
Data Sourced
via NVD·01:15 PM
RemedyDescriptionSeverityWeaknessAffected Software
Apr 27, 2025
Data Sourced
via Ubuntu·05:24 PM
RemedyDescriptionSeverityAffected Software

Parent advisories

This vulnerability appears in the following advisories.

Frequently Asked Questions

1

What is the severity of CVE-2024-40931?

CVE-2024-40931 has a medium severity rating due to its potential impact on system stability.

2

How do I fix CVE-2024-40931?

To fix CVE-2024-40931, you should update the Linux kernel to one of the recommended versions specified in the advisory.

3

What systems are affected by CVE-2024-40931?

CVE-2024-40931 affects specific versions of the Linux kernel across Red Hat and Debian distributions.

4

Can CVE-2024-40931 be exploited remotely?

CVE-2024-40931 can potentially be exploited remotely if specific conditions are met.

5

What is MPTCP in relation to CVE-2024-40931?

MPTCP, or MultiPath TCP, is a protocol whose improper handling in the Linux kernel is addressed by CVE-2024-40931.

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