CVE-2024-40931: mptcp: ensure snd_una is properly initialized on connect
First published: Fri Jul 12 2024(Updated: )
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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| 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 |
| Linux Kernel | >=5.9<5.10.221 | |
| Linux Kernel | >=5.11<5.15.162 | |
| Linux Kernel | >=5.16<6.1.95 | |
| Linux Kernel | >=6.2<6.6.35 | |
| Linux Kernel | >=6.7<6.9.6 | |
| Linux Kernel | =6.10-rc1 | |
| Linux Kernel | =6.10-rc2 | |
| Linux Kernel | =6.10-rc3 | |
| IBM Security Verify Governance - Identity Manager | <=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 | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.128-1 6.12.21-1 6.12.22-1 | |
| debian/linux-6.1 | 6.1.129-1~deb11u1 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
- https://access.redhat.com/errata/RHSA-2024:7001
- https://access.redhat.com/errata/RHSA-2024:7000
- https://access.redhat.com/errata/RHSA-2024:8617
- https://access.redhat.com/errata/RHSA-2024:9498
- https://access.redhat.com/errata/RHSA-2024:9497
- https://bugzilla.redhat.com/show_bug.cgi?id=2297515
- https://git.kernel.org/stable/c/208cd22ef5e57f82d38ec11c1a1703f9401d6dde
- https://git.kernel.org/stable/c/7b9c7fc8600b64a86e4b47b2d190bba380267726
- https://git.kernel.org/stable/c/f03c46eabb3a67bd2993e237ab5517f00a5f1813
- https://git.kernel.org/stable/c/f1f0a46f8bb8890b90ab7194f0a0c8fe2a3fb57f
- https://git.kernel.org/stable/c/ef473bf1dd7e8dd08bcc04b9e2d1bfed69a0a7ce
- https://git.kernel.org/stable/c/8031b58c3a9b1db3ef68b3bd749fbee2e1e1aaa3
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-40931
- https://nvd.nist.gov/vuln/detail/CVE-2024-40931
- https://launchpad.net/bugs/cve/CVE-2024-40931
- https://security-tracker.debian.org/tracker/CVE-2024-40931
- https://ubuntu.com/security/CVE-2024-40931
- https://git.kernel.org/linus/8031b58c3a9b1db3ef68b3bd749fbee2e1e1aaa3
- https://www.ibm.com/support/pages/node/7230443 (Advisory)
Frequently Asked Questions
What is the severity of CVE-2024-40931?
CVE-2024-40931 has a medium severity rating due to its potential impact on system stability.
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.
What systems are affected by CVE-2024-40931?
CVE-2024-40931 affects specific versions of the Linux kernel across Red Hat and Debian distributions.
Can CVE-2024-40931 be exploited remotely?
CVE-2024-40931 can potentially be exploited remotely if specific conditions are met.
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.
- agent/title
- agent/type
- agent/author
- agent/first-publish-date
- collector/redhat-bugzilla
- source/Red Hat
- alias/CVE-2024-40931
- agent/software-canonical-lookup
- collector/mitre-cve
- source/MITRE
- agent/trending
- agent/severity
- agent/weakness
- agent/remedy
- collector/nvd-api
- source/NVD
- collector/nvd-cve
- collector/usn-cve
- source/Ubuntu
- agent/description
- collector/security-tracker-debian
- source/Debian
- agent/last-modified-date
- agent/references
- agent/source
- agent/softwarecombine
- agent/tags
- agent/event
- collector/ibm-support
- source/IBM
- package-manager/redhat
- vendor/linux
- canonical/linux kernel
- version/linux kernel/5.9
- version/linux kernel/5.11
- version/linux kernel/5.16
- version/linux kernel/6.2
- version/linux kernel/6.7
- version/linux kernel/6.10-rc1
- version/linux kernel/6.10-rc2
- version/linux kernel/6.10-rc3
- package-manager/debian
- vendor/ibm
- canonical/ibm security verify governance - identity manager
- version/ibm security verify governance - identity manager/isvg 10.0.2
- canonical/ibm security verify governance, identity manager software stack
- version/ibm security verify governance, identity manager software stack/isvg 10.0.2
- canonical/ibm security verify governance, identity manager virtual appliance
- version/ibm security verify governance, identity manager virtual appliance/isvg 10.0.2
- canonical/ibm security verify governance identity manager container
- version/ibm security verify governance identity manager container/isvg 10.0.2