What is CVE-2024-26806?

CVE-2024-26806 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Improper Locking flaw (CWE-667), affecting Linux kernel versions from 6.7 onward and patched in 6.7.9 and 6.8. CVE-2024-26806 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2024-26806?

CVE-2024-26806 has a CVSS score of 5.5 out of 10, rated Medium severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2024-26806?

Yes, CVE-2024-26806 has been patched. Fixed versions include 6.7.9 and 6.8. If you are running Linux kernel 6.7 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2024-26806 actively exploited?

CVE-2024-26806 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Improper Locking (CWE-667)?

The product does not properly acquire or release a lock, which can lead to unexpected behaviour. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/667.html

CVE-2024-26806

Medium

In the Linux kernel, the following vulnerability has been resolved: spi: cadence-qspi: remove system-wide suspend helper calls from runtime PM hooks The ->runtime_suspend() and ->runtime_resume() callbacks are not expected to call spi_controller_suspend() and spi_controller_resume(). Remove calls to those in the cadence-qspi driver. Those helpers have two roles currently: - They stop/start the queue, including dealing with the kworker. - They toggle the SPI controller SPI_CONTROLLER_SUSPENDED flag. It requires acquiring ctlr->bus_lock_mutex. Step one is irrelevant because cadence-qspi is not queued. Step two however has two implications: - A deadlock occurs, because ->runtime_resume() is called in a context where the lock is already taken (in the ->exec_op() callback, where the usage count is incremented). - It would disallow all operations once the device is auto-suspended. Here is a brief call tree highlighting the mutex deadlock: spi_mem_exec_op() ... spi_mem_access_start() mutex_lock(&ctlr->bus_lock_mutex) cqspi_exec_mem_op() pm_runtime_resume_and_get() cqspi_resume() spi_controller_resume() mutex_lock(&ctlr->bus_lock_mutex) ... spi_mem_access_end() mutex_unlock(&ctlr->bus_lock_mutex) ...

Package Linux Kernel

Published 2024-04-04

Last modified 2025-03-27

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

5.5

out of 10

Medium

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Weakness type

CWE-667

CVE-2024-26806 is a Improper Locking vulnerability

What is Improper Locking?

The product does not properly acquire or release a lock, which can lead to unexpected behaviour. Learn more on MITRE CWE

Affected versions

Linux kernel versions 6.7 and later are affected. Fixed in 6.7.9, 6.8 and their respective stable series.

Affected from

≥ 6.7

Fixed in

✓ 6.7.9 6.7.x ✓ 6.8

References

2 total

Kernel Git
https://git.kernel.org/stable/c/041562ebc4759c9932b59a06527f8753b86da365

Patch
Kernel Git
https://git.kernel.org/stable/c/959043afe53ae80633e810416cee6076da6e91c6

Patch

Details

CVE ID CVE-2024-26806

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-04-04

Modified 2025-03-27

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2024-26806?

CVE-2024-26806 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Improper Locking flaw (CWE-667) . It affects Linux kernel versions from 6.7 onward and has been patched in 6.7.9 and 6.8. CVE-2024-26806 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2024-26806?

CVE-2024-26806 has a CVSS score of 5.5 out of 10, rated Medium severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2024-26806?

Yes. CVE-2024-26806 has been patched. Fixed versions include 6.7.9 and 6.8. If you are running Linux kernel 6.7 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2024-26806 actively exploited?

No. CVE-2024-26806 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.