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. 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?

No patch is currently available for CVE-2024-42233. Monitor the NIST NVD and your Linux distribution's security advisories for updates.

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

Awaiting data

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

References

The following references provide additional information about CVE-2024-42233 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/24be02a42181f0707be0498045c4c4b13273b16d
Patch
Kernel patch commit
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 Awaiting data

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 . 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?

No patch is currently available for CVE-2024-42233. Monitor the NIST NVD and your Linux distribution's security advisories for updates.
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.