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Linux Kernel EUVDEUVD-2026-59732

| CVE-2026-74539 HIGH
2026-08-15 Linux GHSA-c98p-qcxp-3m7h
Information Disclosure Linux Red Hat Suse
8.0
CVSS 3.1 · Vendor: Linux
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Severity by source

Vendor (Linux) PRIMARY
8.0 HIGH
AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
vuln.today AI
6.4 MEDIUM

Race condition requires precise timing (AC:H); getname is a read path making I:H unjustified; AV:A and PR:L retained per Bluetooth ISO socket requirements.

3.1 AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H
4.0 AV:A/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
7.0 HIGH
AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Red Hat
5.5 MEDIUM
qualitative

Primary rating from Vendor (Linux).

CVSS VectorVendor: Linux

CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

5
Analysis Generated
Aug 17, 2026 - 12:16 vuln.today
CVSS changed
Aug 17, 2026 - 06:22 NVD
8.0 (HIGH)
Patch available
Aug 15, 2026 - 13:04 EUVD
CVE Published
Aug 15, 2026 - 12:27 cve.org
UNKNOWN (no severity yet)
CVE Published
Aug 15, 2026 - 12:27 cve.org
HIGH 8.0

DescriptionCVE.org

In the Linux kernel, the following vulnerability has been resolved:

Bluetooth: ISO: lock sk in iso_sock_getname

Accessing iso_pi(sk)->conn requires lock_sock, which is not held here.

Fix by adding the lock/release.

AnalysisAI

Missing socket lock in the Linux kernel Bluetooth ISO subsystem exposes a race condition in iso_sock_getname that allows a low-privileged adjacent attacker to trigger a use-after-free or null-pointer dereference via concurrent connection teardown. Systems running affected kernel versions with Bluetooth ISO (Isochronous) sockets enabled are vulnerable to kernel crashes or memory disclosure. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Recon
Gain adjacent Bluetooth or local access
Delivery
Open BTPROTO_ISO socket with low-privileged account
Exploit
Initiate ISO connection to establish iso_pi(sk)->conn
Install
Trigger concurrent connection teardown from second thread
C2
Call iso_sock_getname without lock during teardown window
Execute
Dereference freed conn pointer
Impact
Kernel panic or memory disclosure
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Vulnerability AssessmentAI

Exploitation Exploitation requires: (1) the target kernel must be built with Bluetooth ISO support (CONFIG_BT_LE_L2CAP_CORE or equivalent ISO socket support compiled in); (2) the attacker must hold a low-privileged account capable of creating AF_BLUETOOTH sockets with BTPROTO_ISO - typically any unprivileged user on systems without strict socket creation restrictions; (3) the attacker must be able to race iso_sock_getname against a concurrent connection teardown, requiring either local thread control or coordination with a remote Bluetooth peer disconnecting. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The NVD-assigned CVSS 8.0 (AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H) overstates practical risk in several dimensions. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker with low-privileged local access (or an adjacent Bluetooth peer that can induce socket operations) opens a Bluetooth ISO socket and calls getname while concurrently tearing down the connection from another thread. If the conn pointer is freed between the unlocked read and its dereference inside iso_sock_getname, the kernel dereferences a dangling pointer, resulting in a kernel panic (denial of service) or controlled memory disclosure. …
Remediation The primary fix is to upgrade to a patched Linux kernel version: 6.18.44, 7.1.8, or 7.2-rc6, which include the lock_sock/release_sock pairing in iso_sock_getname. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, audit systems inventory to identify Linux deployments with Bluetooth ISO socket support enabled, prioritizing production Bluetooth-dependent infrastructure. …

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Not-Affected
SUSE Linux Enterprise Desktop 15 SP7 Not-Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Not-Affected
SUSE Linux Enterprise High Availability Extension 15 SP7 Not-Affected
SUSE Linux Enterprise High Availability Extension 16.0 Not-Affected

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EUVD-2026-59732 vulnerability details – vuln.today
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