CVE-2025-58183

Unbounded allocation when parsing GNU sparse map in archive/tar

Published Oct 29, 2025 CVSS 3.1 · 4.3 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 3.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L'}

cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L'}

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 3.3, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Golang
Golang archive
Vendors & Products Golang
Golang archive
Type Values Removed Values Added
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.
Title Unbounded allocation when parsing GNU sparse map in archive/tar
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
Go
Published
Updated
Nov 4, 2025, 9:13 PM
Reserved
Aug 27, 2025, 2:50 PM
Status
Deferred
Published
Oct 29, 2025, 11:16 PM
Modified
Oct 8, 2026, 10:10 AM
Severity
Moderate
Public date
Oct 29, 2025, 10:10 PM