CVE-2025-21927

nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu()

Description

In the Linux kernel, the following vulnerability has been resolved: nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu() nvme_tcp_recv_pdu() doesn't check the validity of the header length. When header digests are enabled, a target might send a packet with an invalid header length (e.g. 255), causing nvme_tcp_verify_hdgst() to access memory outside the allocated area and cause memory corruptions by overwriting it with the calculated digest. Fix this by rejecting packets with an unexpected header length.

Category

7.8
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.02%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Frequently Asked Questions

What is the severity of CVE-2025-21927?
CVE-2025-21927 has been scored as a high severity vulnerability.
How to fix CVE-2025-21927?
To fix CVE-2025-21927, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-21927 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-21927 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-21927?
CVE-2025-21927 affects Linux Linux, Linux Linux.
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