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CVE-2026-74530

Bluetooth: hci_sync: hold conn in hci_connect_big_sync() callback

HIGH
8.8
CVSS Score
Published: August 15, 2026 at 12:27 PM UTC
Updated: October 21, 2026 at 01:19 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
HIGH8.8
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: hold conn in hci_connect_big_sync() callback There is theoretical UAF if the conn is freed while the hci_sync task is running. Hold refcount to avoid that. Handle NULL hcon, return 0 + do nothing to match the previous behavior.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
90%
024421cf39923927ab2b5fe895d1d922b9abe67f24421cf39923927ab2b5fe895d1d922b9abe67f6.12.286.14.66.15620810ac1f7f1133a9ac403e132b3ad6995ddf39ee0586ad64a805eaf1a9a10100e908627a561e34
Vendor states this is fixed in 2d91e6244b69d752503b2d44020d8b0e323dbd38 (fixed)
Vendor states this is fixed in 56e78b670356caab0b607e8aad4cf819a1909d07 (fixed)
Vendor states this is fixed in 6.12.114 (unaffected)
Affected range stops below 6.13, so it looks safe — our inference, not a vendor statement
Vendor states this is fixed in 6.15 (unaffected)
Vendor states this is fixed in 6.18.57 (unaffected)
Vendor states this is fixed in 7.1.8 (unaffected)
Vendor states this is fixed in 7.2 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (4)

Source: cverecord
https://git.kernel.org/stable/c/2d91e6244b69d752503b2d44020d8b0e323dbd38
Source: cverecord
https://git.kernel.org/stable/c/56e78b670356caab0b607e8aad4cf819a1909d07
Source: cverecord
https://git.kernel.org/stable/c/ff5625d27415ace5667bf87ebc16c3a0a98db22f
Source: cverecord
https://git.kernel.org/stable/c/117d8bcaf1abc348185e8ab6a4ba9f8f516849a0

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.8HIGHLinux
Vector?

Quick Info

StatusRECEIVED

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