Use After Free Affecting bpftool package, versions <0:3.10.0-1160.36.2.el7


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.82% (53rd percentile)

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  • Snyk IDSNYK-RHEL7-BPFTOOL-7976389
  • published14 Sept 2024
  • disclosed22 Mar 2021

Introduced: 22 Mar 2021

CVE-2021-33034  (opens in a new tab)
CWE-416  (opens in a new tab)

How to fix?

Upgrade RHEL:7 bpftool to version 0:3.10.0-1160.36.2.el7 or higher.
This issue was patched in RHSA-2021:2725.

NVD Description

Note: Versions mentioned in the description apply only to the upstream bpftool package and not the bpftool package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

In the Linux kernel before 5.12.4, net/bluetooth/hci_event.c has a use-after-free when destroying an hci_chan, aka CID-5c4c8c954409. This leads to writing an arbitrary value.

CVSS Base Scores

version 3.1