8.8

CVE-2022-49138: Bluetooth: hci_event: Ignore multiple conn complete events

Modified
AliasesUBUNTU-CVE-2022-49138DEBIAN-CVE-2022-49138
Published 26-02-2025Last modified 05-08-2026

Vulnerability summary

CVE-2022-49138 is a high (CVSS 8.8) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 34.2% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.8, adjacent network); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.40%
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 10 · Related 10
SUSE-SU-2025:02588-1SUSE-SU-2025:02846-1SUSE-SU-2025:02849-1SUSE-SU-2025:02851-1SUSE-SU-2025:02852-1SUSE-SU-2025:03615-1

Timeline

  1. 26-02-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: Ignore multiple conn complete events When one of the three connection complete events is received multiple times for the same handle, the device is registered multiple times which leads to memory corruptions. Therefore, consequent events for a single connection are ignored. The conn->state can hold different values, therefore HCI_CONN_HANDLE_UNSET is introduced to identify new connections. To make sure the events do not contain this or another invalid handle HCI_CONN_HANDLE_MAX and checks are introduced. Buglink: https://bugzilla.kernel.org/show_bug.cgi?id=215497

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.40%

Chance of exploitation in the next 30 days

Percentile

34%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.40% 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

Affected systems

Version check

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

Ubuntu117 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 7d0db0a373195385a2e0b19d1f5e4b186fdcffac, < aa1ca580e3ffe62a2c5ea1c095b609b2943c5269 | ≥ 7d0db0a373195385a2e0b19d1f5e4b186fdcffac, < d5ebaa7c5f6f688959e8d40840b2249ede63b8ed | 2.6.27
  • linux_kernel< 5.17.3
Debian1 product
  • linux< 5.17.3-1

3 vendors · 120 products

References

6 links