8.8

CVE-2026-46056: Bluetooth: hci_event: fix potential UAF in SSP passkey handlers

Modified
AliasesUBUNTU-CVE-2026-46056DEBIAN-CVE-2026-46056
Published 27-05-2026Last modified 19-10-2026

Vulnerability summary

CVE-2026-46056 is a high (CVSS 8.8) Use After Free vulnerability in linux. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 20.8% 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
0.28%
0%100%
Low · -0.13 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 56 · Related 45
OPENSUSE-SU-2026:10954-1OPENSUSE-SU-2026:21555-1RHSA-2026:26427RHSA-2026:26428RHSA-2026:27288RHSA-2026:27789

Timeline

  1. 27-05-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_event: fix potential UAF in SSP passkey handlers hci_conn lookup and field access must be covered by hdev lock in hci_user_passkey_notify_evt() and hci_keypress_notify_evt(), otherwise the connection can be freed concurrently. Extend the hci_dev_lock critical section to cover all conn usage in both handlers. Keep the existing keypress notification behavior unchanged by routing the early exits through a common unlock path.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.28%

Chance of exploitation in the next 30 days

Percentile

21%

Versus all other CVEs

30-day change

Decrease -0.13 pp

From 0.41% 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.

Ubuntu159 products
  • linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 6.8.0-136.136 | < 7.0.0-27.27
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 6.8.0-1061.64 | < 7.0.0-1008.8
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 92a25256f142d55e25f9959441cea6ddeabae57e, < ea18732d2614557e59f4c0d8cdbe6611aeab33b7 | ≥ 92a25256f142d55e25f9959441cea6ddeabae57e, < d28311539ac9f65e29308ea219ecaa48aa5e76e5 | ≥ 92a25256f142d55e25f9959441cea6ddeabae57e, < b6ae482f88654db407c8c17619d4b62959b903ef | ≥ 92a25256f142d55e25f9959441cea6ddeabae57e, < 204028af77a265e31ceb4ba7f643349a3cca72b2 | ≥ 92a25256f142d55e25f9959441cea6ddeabae57e, < 01a6431766c35dfedb86e0cb5d3fc80c6d604a47 | ≥ 92a25256f142d55e25f9959441cea6ddeabae57e, < e08d75753db17aa943d7622f09d9c217b5bfd3b8 | ≥ 92a25256f142d55e25f9959441cea6ddeabae57e, < 8c6443bb9257b780986fb67ec08565bf48ecb8d7 | ≥ 92a25256f142d55e25f9959441cea6ddeabae57e, < 85fa3512048793076eef658f66489112dcc91993 | 3.7
  • linux_kernel≥ 3.7, < 6.1.175 | ≥ 6.2, < 6.6.140 | ≥ 6.7, < 6.12.86 | ≥ 6.13, < 6.18.27 | ≥ 6.19, < 7.0.4
Debian1 product
  • linux< 6.1.176-1 | < 6.12.86-1 | < 7.0.4-1

3 vendors · 162 products

References

40 links
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