What is CVE-2024-44973?

CVE-2024-44973 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10, affecting Linux kernel versions from 6.8 onward and patched in 6.10.5 and 6.11. CVE-2024-44973 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2024-44973?

CVE-2024-44973 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-2024-44973?

Yes, CVE-2024-44973 has been patched. Fixed versions include 6.10.5 and 6.11. If you are running Linux kernel 6.8 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2024-44973 actively exploited?

CVE-2024-44973 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2024-44973

Medium

In the Linux kernel, the following vulnerability has been resolved: mm, slub: do not call do_slab_free for kfence object In 782f8906f805 the freeing of kfence objects was moved from deep inside do_slab_free to the wrapper functions outside. This is a nice change, but unfortunately it missed one spot in __kmem_cache_free_bulk. This results in a crash like this: BUG skbuff_head_cache (Tainted: G S B E ): Padding overwritten. 0xffff88907fea0f00-0xffff88907fea0fff @offset=3840 slab_err (mm/slub.c:1129) free_to_partial_list (mm/slub.c:? mm/slub.c:4036) slab_pad_check (mm/slub.c:864 mm/slub.c:1290) check_slab (mm/slub.c:?) free_to_partial_list (mm/slub.c:3171 mm/slub.c:4036) kmem_cache_alloc_bulk (mm/slub.c:? mm/slub.c:4495 mm/slub.c:4586 mm/slub.c:4635) napi_build_skb (net/core/skbuff.c:348 net/core/skbuff.c:527 net/core/skbuff.c:549) All the other callers to do_slab_free appear to be ok. Add a kfence_free check in __kmem_cache_free_bulk to avoid the crash.

Package Linux Kernel

Published 2024-09-04

Last modified 2024-10-03

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

Affected versions

Linux kernel versions 6.8 and later are affected. Fixed in 6.10.5, 6.11 and their respective stable series.

Affected from

≥ 6.8

Fixed in

✓ 6.10.5 6.10.x ✓ 6.11

References

The following references provide additional information about CVE-2024-44973 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/a371d558e6f3aed977a8a7346350557de5d25190
Patch
Kernel patch commit
https://git.kernel.org/stable/c/b35cd7f1e969aaa63e6716d82480f6b8a3230949
Patch

Details

CVE ID CVE-2024-44973

Severity Medium

CVSS score 5.5 / 10

CVSS version 3.1

Published 2024-09-04

Modified 2024-10-03

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2024-44973?

CVE-2024-44973 is a Medium severity Linux kernel vulnerability with a CVSS score of 5.5 out of 10 . It affects Linux kernel versions from 6.8 onward and has been patched in 6.10.5 and 6.11. CVE-2024-44973 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2024-44973?

CVE-2024-44973 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-2024-44973?

Yes — CVE-2024-44973 has been patched. Fixed versions include 6.10.5 and 6.11. If you are running Linux kernel 6.8 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2024-44973 actively exploited?

No — CVE-2024-44973 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.