What is CVE-2024-42233?

CVE-2024-42233 is a Low severity Linux kernel vulnerability with a CVSS score of 3.3 out of 10, affecting Linux kernel versions from 6.9 onward and patched in 6.9.10 and 6.10. CVE-2024-42233 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2024-42233?

CVE-2024-42233 has a CVSS score of 3.3 out of 10, rated Low severity. The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.

Is there a patch available for CVE-2024-42233?

Yes, CVE-2024-42233 has been patched. Fixed versions include 6.9.10 and 6.10. If you are running Linux kernel 6.9 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2024-42233 actively exploited?

CVE-2024-42233 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2024-42233

Low

In the Linux kernel, the following vulnerability has been resolved: filemap: replace pte_offset_map() with pte_offset_map_nolock() The vmf->ptl in filemap_fault_recheck_pte_none() is still set from handle_pte_fault(). But at the same time, we did a pte_unmap(vmf->pte). After a pte_unmap(vmf->pte) unmap and rcu_read_unlock(), the page table may be racily changed and vmf->ptl maybe fails to protect the actual page table. Fix this by replacing pte_offset_map() with pte_offset_map_nolock(). As David said, the PTL pointer might be stale so if we continue to use it infilemap_fault_recheck_pte_none(), it might trigger UAF. Also, if the PTL fails, the issue fixed by commit 58f327f2ce80 ("filemap: avoid unnecessary major faults in filemap_fault()") might reappear.

Package Linux Kernel

Published 2024-08-07

Last modified 2024-08-08

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

3.3

out of 10

Low

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

None

Vector string

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

Affected versions

Linux kernel versions 6.9 and later are affected. Fixed in 6.9.10, 6.10 and their respective stable series.

Affected from

≥ 6.9

Fixed in

✓ 6.9.10 6.9.x ✓ 6.10

References

2 total

Kernel Git
https://git.kernel.org/stable/c/24be02a42181f0707be0498045c4c4b13273b16d

Patch
Kernel Git
https://git.kernel.org/stable/c/6a6c2aec1a89506595801b4cf7e8eef035f33748

Patch

Details

CVE ID CVE-2024-42233

Severity Low

CVSS score 3.3 / 10

CVSS version 3.1

Published 2024-08-07

Modified 2024-08-08

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2024-42233?

CVE-2024-42233 is a Low severity Linux kernel vulnerability with a CVSS score of 3.3 out of 10 . It affects Linux kernel versions from 6.9 onward and has been patched in 6.9.10 and 6.10. CVE-2024-42233 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2024-42233?

CVE-2024-42233 has a CVSS score of 3.3 out of 10, rated Low severity (CVSS 3.1). The vector string is CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N.
Is there a patch available for CVE-2024-42233?

Yes. CVE-2024-42233 has been patched. Fixed versions include 6.9.10 and 6.10. If you are running Linux kernel 6.9 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2024-42233 actively exploited?

No. CVE-2024-42233 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.