Vulnerability · CVE-2025-40057

In the Linux kernel, the following vulnerability has been resolved: ptp: Add a upper bound on max_vclocks syzbot reported WARNING in max_vclocks_store.

Published Oct 28, 2025 · catalog updated Oct 21, 2026 · In the Linux kernel,

Open the advisory

Exploitation likelihood is not on this record for CVE-2025-40057. A missing EPSS score is not a low risk. Compare In the Linux kernel, with the linked advisory before you change production.

Gaps on this record

The stored product name is a package slug. The name on this page is taken from the title (In the Linux kernel,).
No version range is stored. A customer cannot check an installed version against this record.
No vendor fix or required action is stored. Compare the linked advisory before you change production.
EPSS is missing. A missing score is not a low risk.

Severity: Unknown—
Known exploitation: Not in CISA/VulnCheck KEV
EPSS: Awaiting synchronization with FIRST
Remediation: Not established
Affected products: See sources for product scope

In the Linux kernel, the following vulnerability has been resolved: ptp: Add a upper bound on max_vclocks syzbot reported WARNING in max_vclocks_store. This occurs when the argument max is too large for kcalloc to handle. Extend the guard to guard against values that are too large for kcalloc

No affected version ranges are stored yet. Use the vendor advisory before you decide this record does not apply.

How to fix CVE-2025-40057

Recommended remediation
No required-action text, fix commit, or clear fixed-version range is stored yet.
Official advisories
- CVE.org · cve.org
- NIST NVD · nvd.nist.gov

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for CVE-2025-40057. A missing EPSS score is not a low risk. Compare In the Linux kernel, with the linked advisory before you change production.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

Oct 28, 2025 · NIST NVD
Detected
In the Linux kernel, the following vulnerability has been resolved: ptp: Add a upper bound on max_vclocks syzbot reported WARNING in max_vclocks_store. This occurs when the argument max is too large for kcalloc to handle. Extend the guard to guard against values that are too large for kcalloc
Oct 21, 2026 · NIST NVD
Updated
In the Linux kernel, the following vulnerability has been resolved: ptp: Add a upper bound on max_vclocks syzbot reported WARNING in max_vclocks_store. This occurs when the argument max is too large for kcalloc to handle. Extend the guard to guard against values that are too large for kcalloc

Sources

CVE.orgVulnerability recordCVE-2025-40057
Official CVE identifier
cve.org
NIST NVDVulnerability recordCVE-2025-40057
In the Linux kernel, the following vulnerability has been resolved: ptp: Add a upper bound on max_vclocks syzbot reported WARNING in max_vclocks_store. This occurs when the argument max is too large for kcalloc to handle. Extend the guard to guard against values that are too
nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 21, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.