What is CVE-2024-36966?

CVE-2024-36966 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, classified as a Access of Uninitialized Pointer flaw (CWE-824), affecting Linux kernel versions from 6.6 onward and patched in 6.6.32, 6.8.11 and 6.9. CVE-2024-36966 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2024-36966?

CVE-2024-36966 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-2024-36966?

Yes, CVE-2024-36966 has been patched. Fixed versions include 6.6.32, 6.8.11 and 6.9. If you are running Linux kernel 6.6 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2024-36966 actively exploited?

CVE-2024-36966 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is Access of Uninitialized Pointer (CWE-824)?

The product accesses or uses a pointer that has not been initialised, leading to undefined behaviour. See MITRE CWE for full details: https://cwe.mitre.org/data/definitions/824.html

CVE-2024-36966

Medium

In the Linux kernel, the following vulnerability has been resolved: erofs: reliably distinguish block based and fscache mode When erofs_kill_sb() is called in block dev based mode, s_bdev may not have been initialised yet, and if CONFIG_EROFS_FS_ONDEMAND is enabled, it will be mistaken for fscache mode, and then attempt to free an anon_dev that has never been allocated, triggering the following warning: ============================================ ida_free called for id=0 which is not allocated. WARNING: CPU: 14 PID: 926 at lib/idr.c:525 ida_free+0x134/0x140 Modules linked in: CPU: 14 PID: 926 Comm: mount Not tainted 6.9.0-rc3-dirty #630 RIP: 0010:ida_free+0x134/0x140 Call Trace: <TASK> erofs_kill_sb+0x81/0x90 deactivate_locked_super+0x35/0x80 get_tree_bdev+0x136/0x1e0 vfs_get_tree+0x2c/0xf0 do_new_mount+0x190/0x2f0 [...] ============================================ Now when erofs_kill_sb() is called, erofs_sb_info must have been initialised, so use sbi->fsid to distinguish between the two modes.

Package Linux Kernel

Published 2024-06-08

Last modified 2025-10-01

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-824

CVE-2024-36966 is a Access of Uninitialized Pointer vulnerability

What is Access of Uninitialized Pointer?

The product accesses or uses a pointer that has not been initialised, leading to undefined behaviour. Learn more on MITRE CWE

Affected versions

Linux kernel versions 6.6 and later are affected. Fixed in 6.6.32, 6.8.11, 6.9 and their respective stable series.

Affected from

≥ 6.6

Fixed in

✓ 6.6.32 6.6.x ✓ 6.8.11 6.8.x ✓ 6.9

References

3 total

Kernel Git
https://git.kernel.org/stable/c/7af2ae1b1531feab5d38ec9c8f472dc6cceb4606

Patch
Kernel Git
https://git.kernel.org/stable/c/dcdd49701e429c55b3644fd70fc58d85745f8cfe

Patch
Kernel Git
https://git.kernel.org/stable/c/f9b877a7ee312ec8ce17598a7ef85cb820d7c371

Patch

Details

CVE ID CVE-2024-36966

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-06-08

Modified 2025-10-01

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2024-36966?

CVE-2024-36966 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 , classified as an Access of Uninitialized Pointer flaw (CWE-824) . It affects Linux kernel versions from 6.6 onward and has been patched in 6.6.32, 6.8.11 and 6.9. CVE-2024-36966 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2024-36966?

CVE-2024-36966 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-2024-36966?

Yes. CVE-2024-36966 has been patched. Fixed versions include 6.6.32, 6.8.11 and 6.9. If you are running Linux kernel 6.6 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2024-36966 actively exploited?

No. CVE-2024-36966 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.