CVE-2020-26555: bluetooth bluetooth_core_specification Incorrect Authorization

Modified

AliasesUBUNTU-CVE-2020-26555

Published 24-05-2021Last modified 04-11-2025

Vulnerability summary

CVE-2020-26555 is a medium (CVSS 5.4) Incorrect Authorization vulnerability in bluetooth bluetooth_core_specification. EPSS estimates a 0.88% chance of exploitation in the next 30 days, higher than 59.1% of scored vulnerabilities.

Priority

Routine

Not severe (CVSS 5.4, adjacent network); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?

CVSS score

5.4/10

010

Medium · v3.1 (NVD)

EPSS score

0.88%

0%100%

Low · 0.00 pp in 30 days

KEVNot listedNot listed by any tracked catalog.

RansomwareNot flaggedNo ransomware use recorded.

Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 19 · Related 14

MGASA-2023-0328 MGASA-2023-0331 RHSA-2024:2394 RHSA-2024:4211 RHSA-2024:4352 SUSE-SU-2024:0110-1+13 more

Timeline

24-05-2021
PublishedVulnerability first disclosed.
04-11-2025
Last modifiedVulnerability information updated.

Description

Bluetooth legacy BR/EDR PIN code pairing in Bluetooth Core Specification 1.0B through 5.2 may permit an unauthenticated nearby device to spoof the BD_ADDR of the peer device to complete pairing without knowledge of the PIN.

CVSS metrics

3 scores · 2 sources · 2 versions

v3.15.4v2.04.8

EPSS trend

Probability

0.88%

Chance of exploitation in the next 30 days

Percentile

59%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.88% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs

CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

CWE-863Incorrect AuthorizationThe product performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check.

Affected systems

Version check

Known conditions: adjacent network, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu62 products

linuxAll versions (No fix recorded) | < 4.4.0-219.252 | < 4.15.0-151.157 | < 5.4.0-80.90
linux-aws< 4.4.0-1099.104 | < 4.4.0-1135.149 | < 4.15.0-1109.116 | < 5.4.0-1054.57
linux-aws-5.0All versions (No fix recorded)
linux-aws-5.11All versions (No fix recorded)
linux-aws-5.3All versions (No fix recorded)

linux-aws-5.4< 5.4.0-1054.57~18.04.1
linux-aws-5.8All versions (No fix recorded)
linux-aws-fips< 4.15.0-2051.53 | All versions (No fix recorded) | < 5.4.0-1069.73+fips2
linux-aws-hwe< 4.15.0-1109.116~16.04.1
linux-azure< 4.15.0-1121.134~14.04.1 | < 4.15.0-1121.134~16.04.1 | All versions (No fix recorded) | < 5.4.0-1055.57
linux-azure-4.15< 4.15.0-1121.134
linux-azure-5.11All versions (No fix recorded)
linux-azure-5.3All versions (No fix recorded)
linux-azure-5.4< 5.4.0-1055.57~18.04.1
linux-azure-5.8All versions (No fix recorded)
linux-azure-edgeAll versions (No fix recorded)
linux-azure-fde-5.15< 5.15.0-1114.123~20.04.1
linux-azure-fips< 4.15.0-2033.37 | All versions (No fix recorded) | < 5.4.0-1073.76+fips1
linux-bluefield< 5.4.0-1016.19
linux-dell300x< 4.15.0-1027.32
linux-fips< 4.4.0-1069.75 | All versions (No fix recorded) | < 4.15.0-1066.75 | < 5.4.0-1031.36
linux-gcp< 4.15.0-1106.120~16.04.1 | All versions (No fix recorded) | < 5.4.0-1049.53
linux-gcp-4.15< 4.15.0-1106.120
linux-gcp-5.11All versions (No fix recorded)
linux-gcp-5.3All versions (No fix recorded)
linux-gcp-5.4< 5.4.0-1049.53~18.04.1
linux-gcp-5.8All versions (No fix recorded)
linux-gcp-edgeAll versions (No fix recorded)
linux-gcp-fips< 4.15.0-2016.18 | All versions (No fix recorded) | < 5.4.0-1067.71~20.04.1
linux-gke< 5.4.0-1049.52
linux-gke-4.15All versions (No fix recorded)
linux-gke-5.4< 5.4.0-1049.52~18.04.1
linux-gkeop< 5.4.0-1021.22
linux-gkeop-5.4< 5.4.0-1021.22~18.04.1
linux-hwe< 4.15.0-151.157~16.04.1 | All versions (No fix recorded)
linux-hwe-5.11All versions (No fix recorded)
linux-hwe-5.4< 5.4.0-80.90~18.04.1
linux-hwe-5.8All versions (No fix recorded)
linux-hwe-edgeAll versions (No fix recorded)
linux-intel-5.13All versions (No fix recorded)
linux-intel-iot-realtimeAll versions (No fix recorded)
linux-kvm< 4.4.0-1100.109 | < 4.15.0-1097.99 | < 5.4.0-1044.46
linux-lts-xenial< 4.4.0-219.252~14.04.1
linux-oemAll versions (No fix recorded)
linux-oem-5.10All versions (No fix recorded)
linux-oem-5.13All versions (No fix recorded)
linux-oem-5.6All versions (No fix recorded)
linux-oracle< 4.15.0-1078.86~16.04.1 | < 4.15.0-1078.86 | < 5.4.0-1052.56
linux-oracle-5.0All versions (No fix recorded)
linux-oracle-5.11All versions (No fix recorded)
linux-oracle-5.3All versions (No fix recorded)
linux-oracle-5.4< 5.4.0-1052.56~18.04.1
linux-oracle-5.8All versions (No fix recorded)
linux-raspi< 5.4.0-1041.45
linux-raspi-5.4< 5.4.0-1041.45~18.04.1
linux-raspi-realtimeAll versions (No fix recorded)
linux-raspi2< 4.15.0-1092.98 | All versions (No fix recorded)
linux-realtimeAll versions (No fix recorded)
linux-riscvAll versions (No fix recorded)
linux-riscv-5.11All versions (No fix recorded)
linux-riscv-5.8All versions (No fix recorded)
linux-snapdragon< 4.15.0-1109.118

Show all 62

Intel15 products

Show all 15

Bluetooth1 product

bluetooth_core_specification≥ 1.1b, ≤ 5.2

Fedoraproject1 product

fedoraEOL34

4 vendors · 79 products

References

11 links

www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/reporting-security/X Refsource MISCREPORTVendor Advisory
kb.cert.org/vuls/id/799380X Refsource MISCREPORTThird Party AdvisoryUS Government Resource
lists.fedoraproject.org/archives/…Vendor AdvisoryX Refsource FEDORA
www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00520.htmlX Refsource CONFIRMThird Party Advisory
www.kb.cert.org/vuls/id/799380
ubuntu.com/security/CVE-2020-26555REPORT
www.bluetooth.com/learn-about-bluetooth/key-attributes/bluetooth-security/impersonation-pin-pairing/REPORT
bugzilla.redhat.com/show_bug.cgi?id=1918601REPORT
ubuntu.com/security/notices/USN-5343-1Advisory
lore.kernel.org/lkml/20231001084934.GA16906@linux-691t/T/REPORT

Show all 11 references

www.cve.org/CVERecord?id=CVE-2020-26555REPORT