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CVE-2026-74528: Bluetooth: hci_sync: hold conn in hci_past_sync() callback

Received
AliasesUBUNTU-CVE-2026-74528DEBIAN-CVE-2026-74528
Published 15-08-2026Last modified 17-08-2026

Vulnerability summary

CVE-2026-74528 is a high (CVSS 8.0) vulnerability in linux. EPSS estimates a 0.36% chance of exploitation in the next 30 days, higher than 29.7% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8, adjacent network); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.0/10
010
High · v3.1 (CVE.org)
EPSS score
0.36%
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 2 · Related 2
USN-8959-1USN-8960-1

Timeline

  1. 15-08-2026
    PublishedVulnerability first disclosed.
  2. 17-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: hold conn in hci_past_sync() callback Avoids giving freed pointers to hci_conn_valid(), which kmalloc may have reused. Hold refcount to avoid that.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.36%

Chance of exploitation in the next 30 days

Percentile

30%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.36% on 06-10-2026

06-10-202605-11-2026

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

No weakness data has been published for this record.

Affected systems

Version check

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

Ubuntu115 products
  • linuxAll versions (No fix recorded) | < 7.0.0-42.42
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 7.0.0-1016.17
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 7.1.8-1
Linux1 product
  • linux≥ d3413703d5f8b7d1e6f514f9440ed5da1bc30796, < e6792adef614b389141b142e30ee549e4a47dd7d | ≥ d3413703d5f8b7d1e6f514f9440ed5da1bc30796, < abf9753edf3f88282c44a605f3945d8d4f8dd86c | 6.19

3 vendors · 117 products

References

8 links