CVE-2024-40931

MEDIUM EPSS 16.5%
Published Jul 12, 20241y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Jul 12, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
16.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-908

Affected Products 8

VendorProductVersionRange
linuxlinux_kernel*≥5.9  –  <5.10.221
linuxlinux_kernel*≥5.11  –  <5.15.162
linuxlinux_kernel*≥5.16  –  <6.1.95
linuxlinux_kernel*≥6.2  –  <6.6.35
linuxlinux_kernel*≥6.7  –  <6.9.6
linuxlinux_kernel6.10any
linuxlinux_kernel6.10any
linuxlinux_kernel6.10any

References 7

  • git.kernel.org https://git.kernel.org/stable/c/208cd22ef5e57f82d38ec11c1a1703f9401d6dde
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7b9c7fc8600b64a86e4b47b2d190bba380267726
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8031b58c3a9b1db3ef68b3bd749fbee2e1e1aaa3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ef473bf1dd7e8dd08bcc04b9e2d1bfed69a0a7ce
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f03c46eabb3a67bd2993e237ab5517f00a5f1813
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f1f0a46f8bb8890b90ab7194f0a0c8fe2a3fb57f
    Patch
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/208cd22ef5e57f82d38ec11c1a1703f9401d6dde
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7b9c7fc8600b64a86e4b47b2d190bba380267726
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8031b58c3a9b1db3ef68b3bd749fbee2e1e1aaa3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ef473bf1dd7e8dd08bcc04b9e2d1bfed69a0a7ce
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f03c46eabb3a67bd2993e237ab5517f00a5f1813
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f1f0a46f8bb8890b90ab7194f0a0c8fe2a3fb57f
    Patch