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Fencer Vulns
high 8.8

CVE-2019-8922 json

A heap-based buffer overflow was discovered in bluetoothd in BlueZ through 5.48.

published 2021-11-29 4 y ago modified 2026-06-17 4 mo ago also EUVD-2019-18310

cvss
8.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.5%
EPSS 1.5% chance of exploitation in 30 days, percentile 74%
public exploits
0
none known

Summary

A heap-based buffer overflow was discovered in bluetoothd in BlueZ through 5.48. There isn't any check on whether there is enough space in the destination buffer. The function simply appends all data passed to it. The values of all attributes that are requested are appended to the output buffer. There are no size checks whatsoever, resulting in a simple heap overflow if one can craft a request where the response is large enough to overflow the preallocated buffer. This issue exists in service_attr_req gets called by process_request (in sdpd-request.c), which also allocates the response buffer.

Patch / fix

  • bluez Debian 14, Debian 13, Debian 12 5.54-1

debian advisories DEBIAN-CVE-2019-8922

  • bluez Ubuntu 18.04 LTS 5.48-0ubuntu3.7
  • bluez Ubuntu Pro 16.04 LTS 5.37-0ubuntu5.3+esm5

ubuntu advisories UBUNTU-CVE-2019-8922

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

  • bluez SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLES 15 SP2-BCL +6 more 5.48-150200.13.17.1
  • bluez SLES for SAP 15 SP1, SLES for SAP 15, SLES 15-LTSS +7 more 5.48-150000.5.41.1
  • bluez SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLES 15 SP2-BCL +6 more 5.48-150200.13.8.1
  • bluez SLES for SAP 12 SP5, SLES for SAP 12 SP4, SLES 12 SP5 +7 more 5.13-5.26.1
  • bluez SLES for SAP 15 SP1, SLES for SAP 15, SLES 15-LTSS +7 more 5.48-150000.5.34.1

suse advisories SUSE-SU-2022:3691-1SUSE-SU-2022:3687-1SUSE-SU-2022:2948-1SUSE-SU-2022:2900-1SUSE-SU-2022:2864-1

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-2019-8922 updated cvss 8.8

bluez: heap-based buffer overflow via crafted request

  • Red Hat Enterprise Linux 6 bluez, bluez-alsa, bluez-cups, bluez-libs, bluez-compat, bluez-gstreamer
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux 7 bluez, bluez-cups, bluez-libs, bluez-hid2hci
    affected: no fix planned “Will not fix”
  • Red Hat Enterprise Linux 8 bluez, bluez-cups, bluez-libs, bluez-obexd, bluez-hid2hci Red Hat Enterprise Linux 9 bluez, bluez-cups, bluez-libs, bluez-obexd
    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

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
6 mo ago

Exploit prediction

1.52% chance of exploitation in the next 30 days, higher than 74% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • ssd-disclosure.com https://ssd-disclosure.com/ssd-advisory-linux-bluez-information-leak-and-heap-overflow/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 8.8 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 3.1 8.8 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA 3.1 8.8 CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 5.8 AV:A/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness

References

Sources

Fencer Vulns 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.