Answer in brief
CVE-2026-64357 records a Unknown severity vulnerability in xfs: fix exchmaps reservation limit check. 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 | >=966ceafc7a437105ecfe1cadb3747b2965a260ca <c597c8580d50127fc1221b5a5b653a94d49e23e3 || >=966ceafc7a437105ecfe1cadb3747b2965a260ca <a62ef2d13d6e7270dd5e88c6082bf2d0edcd5112 || >=966ceafc7a437105ecfe1cadb3747b2965a260ca <4707344b0d36d1012c8a1716e20167cd3afdd5f1 || >=966ceafc7a437105ecfe1cadb3747b2965a260ca <0a5213bbff62b51c7d4999ac8c7e11ea57d00d45 | c597c8580d50127fc1221b5a5b653a94d49e23e3, a62ef2d13d6e7270dd5e88c6082bf2d0edcd5112, 4707344b0d36d1012c8a1716e20167cd3afdd5f1, 0a5213bbff62b51c7d4999ac8c7e11ea57d00d45 |
| Linux/Linuxgeneric | 6.10 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 11, 2026
In the Linux kernel, the following vulnerability has been resolved: xfs: fix exchmaps reservation limit check xfs_exchmaps_estimate_overhead() adds the bmbt and rmapbt overhead to a local resblks variable, but the final UINT_MAX check still tests req->resblks. That is the reservation value from before the overhead was added. The computed value is stored back in req->resblks and later passed to xfs_trans_alloc(), whose block reservation argument is unsigned int. Check the computed reservation so the existing limit applies to the value that will be used.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-64357 records a Unknown severity vulnerability in xfs: fix exchmaps reservation limit check. 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 | >=966ceafc7a437105ecfe1cadb3747b2965a260ca <c597c8580d50127fc1221b5a5b653a94d49e23e3 || >=966ceafc7a437105ecfe1cadb3747b2965a260ca <a62ef2d13d6e7270dd5e88c6082bf2d0edcd5112 || >=966ceafc7a437105ecfe1cadb3747b2965a260ca <4707344b0d36d1012c8a1716e20167cd3afdd5f1 || >=966ceafc7a437105ecfe1cadb3747b2965a260ca <0a5213bbff62b51c7d4999ac8c7e11ea57d00d45 | c597c8580d50127fc1221b5a5b653a94d49e23e3, a62ef2d13d6e7270dd5e88c6082bf2d0edcd5112, 4707344b0d36d1012c8a1716e20167cd3afdd5f1, 0a5213bbff62b51c7d4999ac8c7e11ea57d00d45 |
| Linux/Linuxgeneric | 6.10 | Not reported |
Published upstream
Jul 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 11, 2026
In the Linux kernel, the following vulnerability has been resolved: xfs: fix exchmaps reservation limit check xfs_exchmaps_estimate_overhead() adds the bmbt and rmapbt overhead to a local resblks variable, but the final UINT_MAX check still tests req->resblks. That is the reservation value from before the overhead was added. The computed value is stored back in req->resblks and later passed to xfs_trans_alloc(), whose block reservation argument is unsigned int. Check the computed reservation so the existing limit applies to the value that will be used.
Quoted source text, attributed separately from HOL analysis.