CVE-2025-21988
Linux Kernel vulnerability
- Published2 Apr 2025
Description
In the Linux kernel, the following vulnerability has been resolved: fs/netfs/read_collect: add to next->prev_donated If multiple subrequests donate data to the same "next" request (depending on the subrequest completion order), each of them would overwrite the `prev_donated` field, causing data corruption and a BUG() crash ("Can't donate prior to front").
CVSS 3.1 breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HAffected products
Remediation
References
Frequently asked
Is CVE-2025-21988 being actively exploited?
CVE-2025-21988 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.39%.
How severe is CVE-2025-21988?
CVE-2025-21988 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.39% probability of exploitation.
Which products are affected by CVE-2025-21988?
Affected products include Linux Kernel.
How do I fix CVE-2025-21988?
Upgrade affected software to a fixed version, for example Linux Kernel 6.12.20 or later, then confirm no affected versions remain in your inventory.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2025-21988 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.