Medium severity5.5NVD Advisory· Published Apr 2, 2025· Updated Jun 17, 2026

CVE-2025-21988

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").

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Linux/Kernelllm-fuzzy2 versions
(expand)+ 1 more
- (no CPE)
- (no CPE)range: 6.12
osv-coords
pkg:linux/kernel
Range: >= 6.12.0, < 6.12.20

Patches

Vulnerability mechanics

References

git.kernel.org/stable/c/62b9ad7e52d4777f7e775ee1f0ad2452f6041024nvdPatch
git.kernel.org/stable/c/e25cec3b76aba47a49138d2162fc809c6cd49c9envdPatch
git.kernel.org/stable/c/e2d46f2ec332533816417b60933954173f602121nvdPatch

News mentions

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cvss	0.358
epss	0.000
exploit	0.000
kev	0.000
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ransomware	0.000