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CVE-2025-21988

fs/netfs/read_collect: add to next->prev_donated

MEDIUM
5.5
CVSS Score
Published: April 2, 2025 at 12:53 PM UTC
Updated: August 5, 2026 at 12:44 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.4%

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").

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel· Linux
95%
6.12 ≤ v < 6.12.206.12 ≤ v < 6.13.86.12 ≤ v < 6.146.13 ≤ v < 6.13.86.12ee4cdf7ba857a894ad1650d6ab77669cbbfa329e
Vendor states this is fixed in 62b9ad7e52d4777f7e775ee1f0ad2452f6041024 (fixed)
Vendor states this is fixed in e25cec3b76aba47a49138d2162fc809c6cd49c9e (fixed)
Vendor states this is fixed in e2d46f2ec332533816417b60933954173f602121 (fixed)
Vendor states this is fixed in 6.12 (unaffected)
Vendor states this is fixed in 6.12.20 (unaffected)
Vendor states this is fixed in 6.13.8 (unaffected)
Vendor states this is fixed in 6.14 (unaffected)

References (3)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/e25cec3b76aba47a49138d2162fc809c6cd49c9e
Patch
Source: cverecord
https://git.kernel.org/stable/c/62b9ad7e52d4777f7e775ee1f0ad2452f6041024
Patch
Source: cverecord
https://git.kernel.org/stable/c/e2d46f2ec332533816417b60933954173f602121

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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