# CVE-2025-58183

## Summary

- **CVE ID:** CVE-2025-58183
- **Severity:** MEDIUM
- **CVSS Score:** 4.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L)
- **CWE:** N/A
- **Published:** Oct 29, 2025
- **Last Modified:** Sep 14, 2026

## Description

tar.Reader does not set a maximum size on the number of sparse region data blocks in GNU tar pax 1.0 sparse files. A maliciously-crafted archive containing a large number of sparse regions can cause a Reader to read an unbounded amount of data from the archive into memory. When reading from a compressed source, a small compressed input can result in large allocations.

## Affected Products

- Go standard library — archive/tar (0)
- Go standard library — archive/tar (1.25.0)

## References

- [CNA](https://go.dev/cl/709861)
- [CNA](https://go.dev/issue/75677)
- [CNA](https://groups.google.com/g/golang-announce/c/4Emdl2iQ_bI)
- [CNA](https://pkg.go.dev/vuln/GO-2025-4014)
- [CVE](http://www.openwall.com/lists/oss-security/2025/10/08/1)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.41%
- **EPSS Percentile:** 35.1

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._