Is CVE-2025-40364 in the CISA KEV catalog?

No. CVE-2025-40364 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2025-40364?

CVE-2025-40364 has a CVSS v3 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2025-40364?

CVE-2025-40364 has an EPSS score of 0.23% (14th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2025-40364?

Upgrade linux on debian 12 to 6.1.129-1 or later.

CVE & CISA-KEV Catalog

CVE-2025-40364

HIGH

7.8

CVSS v3

NVD

Description

In the Linux kernel, the following vulnerability has been resolved: io_uring: fix io_req_prep_async with provided buffers io_req_prep_async() can import provided buffers, commit the ring state by giving up on that before, it'll be reimported later if needed.

How to fix

Remediation Available

linuxDebian

Fixed in:6.1.129-1CVE-2025-40364

Fixed in:6.12.15-1CVE-2025-40364

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

0.23%probability of exploitation in 30 days

14thpercentile

Low risk: more likely to be exploited than 14% of all known CVEs.

References

Patch7

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-11-17.