CVE-2025-21988

low-risk
Published 2025-04-02

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").

Do I need to act?

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0.07% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
5
CVSS 5.5/10 Medium
LOCAL / LOW complexity

Affected Products (1)

Affected Vendors

Linux

References (3)

Patch https://git.kernel.org/stable/c/62b9ad7e52d4777f7e775ee1f0ad2452f6041024
Patch https://git.kernel.org/stable/c/e25cec3b76aba47a49138d2162fc809c6cd49c9e
Patch https://git.kernel.org/stable/c/e2d46f2ec332533816417b60933954173f602121
23
/ 100
low-risk
Severity 18/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal