What is CVE-2024-26899?

CVE-2024-26899 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 6.7.11, 6.8.2 and 6.9. CVE-2024-26899 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2024-26899?

CVE-2024-26899 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-2024-26899?

Yes, CVE-2024-26899 has been patched. Fixed versions include 6.7.11, 6.8.2 and 6.9. 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-2024-26899 actively exploited?

CVE-2024-26899 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-2024-26899

Medium

In the Linux kernel, the following vulnerability has been resolved: block: fix deadlock between bd_link_disk_holder and partition scan 'open_mutex' of gendisk is used to protect open/close block devices. But in bd_link_disk_holder(), it is used to protect the creation of symlink between holding disk and slave bdev, which introduces some issues. When bd_link_disk_holder() is called, the driver is usually in the process of initialization/modification and may suspend submitting io. At this time, any io hold 'open_mutex', such as scanning partitions, can cause deadlocks. For example, in raid: T1 T2 bdev_open_by_dev lock open_mutex [1] ... efi_partition ... md_submit_bio md_ioctl mddev_syspend -> suspend all io md_add_new_disk bind_rdev_to_array bd_link_disk_holder try lock open_mutex [2] md_handle_request -> wait mddev_resume T1 scan partition, T2 add a new device to raid. T1 waits for T2 to resume mddev, but T2 waits for open_mutex held by T1. Deadlock occurs. Fix it by introducing a local mutex 'blk_holder_mutex' to replace 'open_mutex'.

Package Linux Kernel

Published 2024-04-17

Last modified 2024-11-21

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-2024-26899 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 6.7.11, 6.8.2, 6.9 and their respective stable series.

Affected from

≥ 6.7

Fixed in

✓ 6.7.11 6.7.x ✓ 6.8.2 6.8.x ✓ 6.9

References

3 total

Kernel Git
https://git.kernel.org/stable/c/03f12122b20b6e6028e9ed69030a49f9cffcbb75

Patch
Kernel Git
https://git.kernel.org/stable/c/1e5c5b0abaee7b62a10b9707a62083b71ad21f62

Patch
Kernel Git
https://git.kernel.org/stable/c/5a87c1f7993bc8ac358a3766bac5dc7126e01e98

Patch

Details

CVE ID CVE-2024-26899

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-04-17

Modified 2024-11-21

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2024-26899?

CVE-2024-26899 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 6.7.11, 6.8.2 and 6.9. CVE-2024-26899 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2024-26899?

CVE-2024-26899 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-2024-26899?

Yes. CVE-2024-26899 has been patched. Fixed versions include 6.7.11, 6.8.2 and 6.9. 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-2024-26899 actively exploited?

No. CVE-2024-26899 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.