Answer in brief
CVE-2025-21988 records a Unknown severity vulnerability in fs/netfs/read_collect: add to next->prev_donated. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ee4cdf7ba857a894ad1650d6ab77669cbbfa329e <62b9ad7e52d4777f7e775ee1f0ad2452f6041024 || >=ee4cdf7ba857a894ad1650d6ab77669cbbfa329e <e25cec3b76aba47a49138d2162fc809c6cd49c9e || >=ee4cdf7ba857a894ad1650d6ab77669cbbfa329e <e2d46f2ec332533816417b60933954173f602121 | 62b9ad7e52d4777f7e775ee1f0ad2452f6041024, e25cec3b76aba47a49138d2162fc809c6cd49c9e, e2d46f2ec332533816417b60933954173f602121 |
| Linux/Linuxgeneric | 6.12 | Not reported |
Published upstream
Apr 2, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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").
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2025-21988 records a Unknown severity vulnerability in fs/netfs/read_collect: add to next->prev_donated. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=ee4cdf7ba857a894ad1650d6ab77669cbbfa329e <62b9ad7e52d4777f7e775ee1f0ad2452f6041024 || >=ee4cdf7ba857a894ad1650d6ab77669cbbfa329e <e25cec3b76aba47a49138d2162fc809c6cd49c9e || >=ee4cdf7ba857a894ad1650d6ab77669cbbfa329e <e2d46f2ec332533816417b60933954173f602121 | 62b9ad7e52d4777f7e775ee1f0ad2452f6041024, e25cec3b76aba47a49138d2162fc809c6cd49c9e, e2d46f2ec332533816417b60933954173f602121 |
| Linux/Linuxgeneric | 6.12 | Not reported |
Published upstream
Apr 2, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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").
Quoted source text, attributed separately from HOL analysis.