CVE-2024-40931 Affecting bpftool package, versions <0:7.3.0-427.42.1.el9_4


Severity

Recommended
medium

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.04% (12th percentile)

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  • Snyk IDSNYK-ORACLE9-BPFTOOL-7948433
  • published14 Sept 2024
  • disclosed12 Jul 2024

Introduced: 12 Jul 2024

CVE-2024-40931  (opens in a new tab)

How to fix?

Upgrade Oracle:9 bpftool to version 0:7.3.0-427.42.1.el9_4 or higher.
This issue was patched in ELSA-2024-8617.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bpftool package and not the bpftool package as distributed by Oracle. See How to fix? for Oracle:9 relevant fixed versions and status.

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 Scores

version 3.1