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Fencer Intel
medium 6.5

CVE-2020-24490 json

Improper buffer restrictions in BlueZ may allow an unauthenticated user to potentially enable denial of service via adjacent access.

published 5y ago modified 4mo ago also EUVD-2020-17210

cvss
6.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.2%
EPSS 2.2% chance of exploitation in 30 days, percentile 82%
public exploits
0
none known

Summary

Improper buffer restrictions in BlueZ may allow an unauthenticated user to potentially enable denial of service via adjacent access. This affects all Linux kernel versions that support BlueZ.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 5.7.17-1

debian advisories DEBIAN-CVE-2020-24490

  • linux Ubuntu 18.04 LTS 4.15.0-122.124
  • linux Ubuntu 20.04 LTS 5.4.0-52.57
  • linux Ubuntu 22.04 LTS 5.15.0-130.140
  • linux Ubuntu 24.04 LTS 6.8.0-35.35
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1076.83
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1009.9
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1074.83
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1008.9

ubuntu advisories UBUNTU-CVE-2020-24490

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel RHEL 8 4.18.0-240.1.1.el8_3
  • perf RHEL 8 4.18.0-240.1.1.el8_3
  • bpftool RHEL 8 4.18.0-240.1.1.el8_3
  • kernel-core RHEL 8 4.18.0-240.1.1.el8_3
  • kernel-tools RHEL 8 4.18.0-240.1.1.el8_3
  • python3-perf RHEL 8 4.18.0-240.1.1.el8_3
  • kernel-modules RHEL 8 4.18.0-240.1.1.el8_3
  • kernel-zfcpdump RHEL 8 4.18.0-240.1.1.el8_3

red hat advisories RHSA-2020:4685RHSA-2020:4686

  • sca-patterns-hae SLE Module for Server Applications 15 SP3, openSUSE Leap 15.3 1.5.1-150300.10.3.1
  • sca-patterns-base SLE Module for Server Applications 15 SP3, openSUSE Leap 15.3 1.5.0-150300.10.3.1
  • sca-patterns-suma SLE Module for Server Applications 15 SP3, openSUSE Leap 15.3 1.5.0-150300.9.3.1
  • sca-server-report SLE Module for Server Applications 15 SP3, openSUSE Leap 15.3 1.5.1-150300.11.3.1
  • sca-patterns-sle11 SLE Module for Server Applications 15 SP3, openSUSE Leap 15.3 1.5.1-150300.18.3.1
  • sca-patterns-sle12 SLE Module for Server Applications 15 SP3, openSUSE Leap 15.3 1.5.1-150300.3.3.1
  • sca-patterns-sle15 SLE Module for Server Applications 15 SP3, openSUSE Leap 15.3 1.5.1-150300.14.3.1
  • kernel-rt Real Time Module 15 SP2 5.3.18-16.1

suse advisories SUSE-FU-2022:4496-1SUSE-SU-2020:3522-1SUSE-SU-2020:3491-1SUSE-SU-2020:3389-1SUSE-SU-2020:2980-1

  • kernel-rt openSUSE Leap 15.2 5.3.18-lp152.3.5.1
  • kernel-syms-rt openSUSE Leap 15.2 5.3.18-lp152.3.5.1
  • kernel-rt_debug openSUSE Leap 15.2 5.3.18-lp152.3.5.1
  • kernel-source-rt openSUSE Leap 15.2 5.3.18-lp152.3.5.1
  • kernel-default-base openSUSE Leap 15.2 5.3.18-lp152.50.1.lp152.8.10.1
  • kernel-syms openSUSE Leap 15.2 5.3.18-lp152.47.1
  • kernel-obs-qa openSUSE Leap 15.2 5.3.18-lp152.47.1
  • kernel-source openSUSE Leap 15.2 5.3.18-lp152.47.2

opensuse advisories openSUSE-SU-2021:0242-1openSUSE-SU-2020:2112-1openSUSE-SU-2020:1698-1

  • linux Arch Linux 5.9.1.arch1-1
  • linux-zen Arch Linux 5.9.1.zen2-1
  • linux-lts Arch Linux 5.4.72-1
  • linux-hardened Arch Linux 5.8.16.a-1

arch linux advisories AVG-1248AVG-1249AVG-1250AVG-1251

Is CVE-2020-24490 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-24490 updated cvss 7.1

kernel: net: bluetooth: heap buffer overflow when processing extended advertising report events

  • Red Hat CodeReady Linux Builder (v. 8) kernel-debuginfo-common-x86_64 4.18.0-240.1.1.el8_3, kernel-debuginfo-common-aarch64 4.18.0-240.1.1.el8_3, kernel-debuginfo-common-ppc64le 4.18.0-240.1.1.el8_3 Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-240.1.1.el8_3, kernel 4.18.0-240.1.1.el8_3, bpftool 4.18.0-240.1.1.el8_3, kernel-core 4.18.0-240.1.1.el8_3, kernel-tools 4.18.0-240.1.1.el8_3, python3-perf 4.18.0-240.1.1.el8_3, +15 more
    fixed: vendor fix RHSA-2020:4685
  • Red Hat Enterprise Linux Real Time (v. 8) kernel-rt 4.18.0-240.1.1.rt7.55.el8_3, kernel-rt-core 4.18.0-240.1.1.rt7.55.el8_3, kernel-rt-modules 4.18.0-240.1.1.rt7.55.el8_3, kernel-rt-debug-core 4.18.0-240.1.1.rt7.55.el8_3, kernel-rt-debug-modules 4.18.0-240.1.1.rt7.55.el8_3, kernel-rt-modules-extra 4.18.0-240.1.1.rt7.55.el8_3, +2 more Red Hat Enterprise Linux Real Time for NFV (v. 8) kernel-rt 4.18.0-240.1.1.rt7.55.el8_3, kernel-rt-kvm 4.18.0-240.1.1.rt7.55.el8_3, kernel-rt-core 4.18.0-240.1.1.rt7.55.el8_3, kernel-rt-modules 4.18.0-240.1.1.rt7.55.el8_3, kernel-rt-debug-kvm 4.18.0-240.1.1.rt7.55.el8_3, kernel-rt-debug-core 4.18.0-240.1.1.rt7.55.el8_3, +4 more
    fixed: vendor fix RHSA-2020:4686
  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, kernel-alt, python-perf, +9 more Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.24% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 3.1 6.5 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 3.3 AV:A/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • n/a BlueZ Advisory

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.