01 Record

CVE-2026-74534

Bluetooth: ISO: fix refcounting of iso_conn

HighPUBLISHEDCNA: Linux

CNA base score8.8 CVSS v3.xCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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02 Description

Bluetooth: ISO: fix refcounting of iso_conn

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.24% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 15.2% of scored records. A rank, not a probability.

NVD base score

8.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

NVD analysis status

Received. NVD last modified this record on 2026-10-23.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published: 2026-08-15 12:27Z2 MO AGO
Last updated: 2026-10-23 08:20Z6 DAYS AGO
Reserved: 2026-08-15
Assigning CNA: Linux
Record state: PUBLISHED
Severity: High (CVSS 8.8)
CNA CVSS vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weaknesses: No CWE assigned
Data version: 5.2
Document digest: 83f49953e4bd127719fa63f67764795b1558ecfcdece399f52625e531d98c3f9

05 Affected products

VendorProductVersionsPlatforms

LinuxLinuxa58d0f5dac322e16cc75334d000666512341bde5 to < 42c8bd6ac81e21200bb90f1eaf43d19352eec6d7, dc26097bdb864a0d5955b9a25e43376ffc1af99b to < 3b921533e8aa95b77aadcf31737595578e735f3c, dc26097bdb864a0d5955b9a25e43376ffc1af99b to < 8208b4939afb0a1977fffe902c3ca42fe0f3baaa, dc26097bdb864a0d5955b9a25e43376ffc1af99b to < fdfde532ab1caa165fcd8985001157ac8b4db365, f53e7489273dc2bb307bf50f319b3762d45534f0, 6.12.2 to < 6.12.113, 6.11.11 to < 6.12, 6.13—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/42c8bd6ac81e21200bb90f1eaf43d19352eec6d7
git.kernel.orghttps://git.kernel.org/stable/c/3b921533e8aa95b77aadcf31737595578e735f3c
git.kernel.orghttps://git.kernel.org/stable/c/8208b4939afb0a1977fffe902c3ca42fe0f3baaa
git.kernel.orghttps://git.kernel.org/stable/c/fdfde532ab1caa165fcd8985001157ac8b4db365

07 Fixed in

Debian 13

linux
Fixed in 6.12.113-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

linux
Fixed in 7.1.8-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.